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imagettftext
(PHP 4, PHP 5, PHP 7)
imagettftext — 用 TrueType 字体向图像写入文本
说明
$image
, float $size
, float $angle
, int $x
, int $y
, int $color
, string $fontfile
, string $text
)
使用 TrueType 字体将 指定的 text 写入图像。
参数
-
image -
由图象创建函数(例如 imagecreatetruecolor() )返回的图象资源。
-
size -
字体的尺寸。根据 GD 的版本，为像素尺寸（GD1）或点（磅）尺寸（GD2）。
-
angle -
角度制表示的角度，0 度为从左向右读的文本。更高数值表示逆时针旋转。例如 90 度表示从下向上读的文本。
-
x -
由
x，y所表示的坐标定义了第一个字符的基本点（大概是字符的左下角）。这和 imagestring() 不同，其x，y定义了第一个字符的左上角。例如 "top left" 为 0, 0。 -
y -
Y 坐标。它设定了字体基线的位置，不是字符的最底端。
-
color -
颜色索引。使用负的颜色索引值具有关闭防锯齿的效果。见 imagecolorallocate() 。
-
fontfile -
是想要使用的 TrueType 字体的路径。
根据 PHP 所使用的 GD 库的不同，当
fontfile没有以 / 开头时则 .ttf 将被加到文件名之后并且会在库定义字体路径中尝试搜索该文件名。当使用的 GD 库版本低于 2.0.18 时，一个空格字符 而不是分号将被用来作为不同字体文件的“路径分隔符”。不小心使用了此特性将会导致一条警告信息：Warning: Could not find/open font。对受影响的版本来说唯一解决方案就是将字体移动到不包含空格的路径中去。
很多情况下字体都放在脚本的同一个目录下。下面的小技巧可以减轻包含的问题。
<?php
// Set the enviroment variable for GD
putenv ( 'GDFONTPATH=' . realpath ( '.' ));
// Name the font to be used (note the lack of the .ttf extension)
$font = 'SomeFont' ;
?> -
text -
UTF-8 编码的文本字符串。
可以包含十进制数字化字符表示（形式为：€）来访问字体中超过位置 127 的字符。UTF-8 编码的字符串可以直接传递。
命名实体，比如 © 是不支持的。可以考虑使用 html_entity_decode() 来解码命名实体为 UTF-8 字符。 （自 PHP 5.0.0 开始 html_entity_decode() 开始支持）
如果字符串中使用的某个字符不被字体支持，一个空心矩形将替换该字符。
返回值
返回一个含有 8 个单元的数组表示了文本外框的四个角，顺序为坐下角，右下角，右上角，左上角。这些点是相对于文本的而和角度无关，因此“左上角”指的是以水平方向看文字时其左上角。
更新日志
| 版本 | 说明 |
|---|---|
| 5.2.0 |
It is now possible to specify an hexadecimal entity in
text.
|
范例
Example #1 imagettftext() 例子
本例中的脚本将生成一个白色的 400x30 像素 PNG 图像，其中有黑色（带灰色阴影）Arial 字体写的“Testing...”。
<?php
// Set the content-type
header ( 'Content-Type: image/png' );
// Create the image
$im = imagecreatetruecolor ( 400 , 30 );
// Create some colors
$white = imagecolorallocate ( $im , 255 , 255 , 255 );
$grey = imagecolorallocate ( $im , 128 , 128 , 128 );
$black = imagecolorallocate ( $im , 0 , 0 , 0 );
imagefilledrectangle ( $im , 0 , 0 , 399 , 29 , $white );
// The text to draw
$text = 'Testing...' ;
// Replace path by your own font path
$font = 'arial.ttf' ;
// Add some shadow to the text
imagettftext ( $im , 20 , 0 , 11 , 21 , $grey , $font , $text );
// Add the text
imagettftext ( $im , 20 , 0 , 10 , 20 , $black , $font , $text );
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng ( $im );
imagedestroy ( $im );
?> 以上例程的输出类似于：
注释
Note:
本函数同时需要 GD 库和 » FreeType 库。.
参见
- imagettfbbox() - 取得使用 TrueType 字体的文本的范围
用户评论:
[#1] danielslcosta at gmail dot com [2015-07-01 19:27:05]
Note that imagettftext and imagettfbbox will keep file handles open for fonts used (at least in Windows, Apache 2, PHP 5.3.24) - there is a bug report on that but it's related to FreeType, so if you load several types of fonts, or temporary fonts, you may find your system reaching max handles open. Also, you won't be able to unlink it or remove folders that contain the font.
[#2] simbiat at bk dot ru [2015-05-02 14:15:52]
Another way to wrap and center using wordwrap and learning the number of lines in the result of that wordwrap
<?php
$text="privet privet privet privet privet privet2 privet2 privet2 privet2 privet2 privet3";
$text=wordwrap($text, 35, "\n", TRUE);
//setting the image header in order to proper display the image
header("Content-Type: image/png");
//try to create an image
$im = @imagecreate(460, 215)
or die("Cannot Initialize new GD image stream");
//set the background color of the image
$background_color = imagecolorallocate($im, 0x00, 0x00, 0x00);
//set the color for the text
$text_color = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
//adf the string to the image
$font = "verdana.ttf";
$font_size = 20;
$angle = 0;
$splittext = explode ( "\n" , $text );
$lines = count($splittext);
foreach ($splittext as $text) {
$text_box = imagettfbbox($font_size,$angle,$font,$text);
$text_width = abs(max($text_box[2], $text_box[4]));
$text_height = abs(max($text_box[5], $text_box[7]));
$x = (imagesx($im) - $text_width)/2;
$y = ((imagesy($im) + $text_height)/2)-($lines-2)*$text_height;
$lines=$lines-1;
imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font, $text);
}
imagepng($im);
imagedestroy($im);
?>
[#3] David [2014-10-15 12:06:01]
If you get:
"configure: error: freetype.h not found."
then do:
yum install freetype-devel
[#4] suyog at suyogdixit dot com [2013-10-30 10:46:40]
For your general edification: The following drop-in function will place a block of fully justified text onto a GD image. It is a little CPU heavy, so I suggest caching the output rather than doing it on-the-fly.
Arguments:
$image - the GD handle of the target canvas
$size - text size
$angle - slope of text (does not work very well), leave at 0 for horizontal text
$left - no. of pixels from left to start block
$top - no. of pixels from top to start block
$color - handle for colour (imagecolorallocate result)
$font - path to .ttf font
$text - the text to wrap and justify
$max_width - the width of the text block within which the text should be wrapped and fully justified
$minspacing - the minimum number of pixels between words
$linespacing - a multiplier of line height (1 for normal spacing; 1.5 for line-and-a-half etc.)
eg.
$image = ImageCreateFromJPEG( "sample.jpg" );
$cor = imagecolorallocate($image, 0, 0, 0);
$font = 'arial.ttf';
$a = imagettftextjustified($image, 20, 0, 50, 50, $color, $font, "Shree", 500, $minspacing=3,$linespacing=1);
header('Content-type: image/jpeg');
imagejpeg($image,NULL,100);
function imagettftextjustified(&$image, $size, $angle, $left, $top, $color, $font, $text, $max_width, $minspacing=3,$linespacing=1)
{
$wordwidth = array();
$linewidth = array();
$linewordcount = array();
$largest_line_height = 0;
$lineno=0;
$words=explode(" ",$text);
$wln=0;
$linewidth[$lineno]=0;
$linewordcount[$lineno]=0;
foreach ($words as $word)
{
$dimensions = imagettfbbox($size, $angle, $font, $word);
$line_width = $dimensions[2] - $dimensions[0];
$line_height = $dimensions[1] - $dimensions[7];
if ($line_height>$largest_line_height) $largest_line_height=$line_height;
if (($linewidth[$lineno]+$line_width+$minspacing)>$max_width)
{
$lineno++;
$linewidth[$lineno]=0;
$linewordcount[$lineno]=0;
$wln=0;
}
$linewidth[$lineno]+=$line_width+$minspacing;
$wordwidth[$lineno][$wln]=$line_width;
$wordtext[$lineno][$wln]=$word;
$linewordcount[$lineno]++;
$wln++;
}
for ($ln=0;$ln<=$lineno;$ln++)
{
$slack=$max_width-$linewidth[$ln];
if (($linewordcount[$ln]>1)&&($ln!=$lineno)) $spacing=($slack/($linewordcount[$ln]-1));
else $spacing=$minspacing;
$x=0;
for ($w=0;$w<$linewordcount[$ln];$w++)
{
imagettftext($image, $size, $angle, $left + intval($x), $top + $largest_line_height + ($largest_line_height * $ln * $linespacing), $color, $font, $wordtext[$ln][$w]);
$x+=$wordwidth[$ln][$w]+$spacing+$minspacing;
}
}
return true;
}
[#5] lilfo [2013-06-19 16:42:59]
If you need to rotate text around center you can use this function instead of imagettftext_cr() by pillepop2003 that doesn't mantain the same center of the original image (shifting a bit):
function imagettftext_center_rotate(&$im, $size, $angle, $x, $y, $color, $fontfile, $text)
{
// retrieve boundingbox of the non rotated text
$bbox = imagettfbbox($size, 0, $fontfile, $text);
//calculate the parameters of the line from lowerleft to upperright point
$m1 = ($bbox[5]-$bbox[1])/($bbox[4]-$bbox[0]);
$q1 = $bbox[1]-($bbox[0]*$m1);
//calculate the parameters of the line from upperleft to lowerright point
$m2 = ($bbox[3]-$bbox[7])/($bbox[2]-$bbox[6]);
$q2 = $bbox[7]-($bbox[6]*$m2);
//calculate the rectangle center (intersection of the two lines)
$vx = ($q1-$q2)/($m2-$m1);
$vy = ($m1*($q1-$q2)/($m2-$m1))+$q1;
// retrieve boundingbox of the rotated text
$bbox = imagettfbbox($size, $angle, $fontfile, $text);
//calculate the parameters of the line from lowerleft to upperright point
$m1 = ($bbox[5]-$bbox[1])/($bbox[4]-$bbox[0]);
$q1 = $bbox[1]-($bbox[0]*$m1);
//calculate the parameters of the line from upperleft to lowerright point
$m2 = ($bbox[3]-$bbox[7])/($bbox[2]-$bbox[6]);
$q2 = $bbox[7]-($bbox[6]*$m2);
//calculate the rectangle center (intersection of the two lines)
$nx = ($q1-$q2)/($m2-$m1);
$ny = ($m1*($q1-$q2)/($m2-$m1))+$q1;
//calculate the x and y shifting needed
$dx = $nx - $vx;
$dy = $ny - $vy;
// new pivotpoint
$px = $x-$dx;
$py = $y-$dy;
//output
return imagettftext($im, $size, $angle, $px, $py, $color, $fontfile, $text);
}
[#6] mirza_aqueel_qau at hotmail dot com [2011-07-26 04:49:22]
To make a font underline and bold without using the fonts file available in fonts directory of windows use this code. I hope this will help alot of you out there.
<?php
// Create the image
$im = imagecreatetruecolor(499, 330);
// Create some colors
$white = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 499, 329, $white);
// The text to draw
$text ="Muhammad Sarfraz";
$text ="Khurram Faraz";
$text ="Mohammad Imran";
$text ="Zulfiqar Ahmed Khan";
$text="Najam ul Hasnain Shah";
$text="Abdul Rehman Daniyal";
$text="Yasir Siddiqui";
$text="Sohail ur Rehman";
$text="Hamad Aziz Sheikh";
$text="Nauman Khalid";
$text="Saad Ahmed";
$text="Nasir Mehmood Butt";
$text="Mohammad Aqeel Mirza";
// Replace path by your own font path
$font = 'walt.ttf'; // Place this file in your code directory or if font is in font directory set its path with font name as $font=$path.'arial.ttf';
// Add the text
$x=10;
$y=120;
$font_size=40;
$angle=0;
$total_width=0;
$counter=0;
for($i=0; $i<strlen($text); $i++)
{
//$text_to_write=urldecode(substr($text,$i,1)."%0D_");
$dimensions = imagettfbbox($font_size, $angle, $font, substr($text,$i,1));
$total_width+=($dimensions[2]);
}
echo "<pre>";
$dimensions = imagettfbbox($font_size, $angle, $font, $text);
echo "Dimension of full string=".$dimensions[2]."<br/>";
echo "Total width calcuated by algorithm=".$total_width."<br/>";
$difference=$dimensions[2]-$total_width;
echo "Difference=".$difference;
imagettftext($im, $font_size, $angle, $x+1, $y+1, $black, $font, $text);
imagettftext($im, $font_size, $angle, $x, $y, $black, $font, $text);
$x2=$x+$total_width+$difference+2;
//echo $total_width;
echo "<pre/>";
//imageline( $im , $x , $y+4 , $x2 , $y+4 , $black );
imageBoldLine($im, $x, $y+4, $x2, $y+4, $black, $BoldNess=4, $func='imageLine');
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im,"underline.png");
echo "<img src='underline.png'/>";
imagedestroy($im);
?>
[#7] contact at pointhunter dot net [2010-11-28 10:35:41]
Print username on the picture from a sent variable. (u)
<?php
$USERNAME=$_REQUEST['u'];
// Set the content-type
header('Content-type: image/png');
// Create the image
$im = imagecreatetruecolor(350, 30);
// Create some colors
$white = imagecolorallocate($im, 0, 0, 0);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 255, 255, 255);
imagefilledrectangle($im, 0, 0, 399, 29, $white);
// The text to draw
$text = 'Welcome, '.$USERNAME;
// Replace path by your own font path
$font = 'cour.ttf';
// Add some shadow to the text
imagettftext($im, 20, 0, 11, 21, $grey, $font, $text);
// Add the text
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
?>
[#8] John Conde [2010-11-01 10:17:09]
If you want to create a paragraph you will need to break your text up into lines and then place each line individually one below the next.
Here's a basic example of how to do that:
<?php
// Basic font settings
$font ='./times.ttf';
$font_size = 15;
$font_color = 0x000000
// Text to be placed as a paragraph
$text = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer non nunc lectus. Curabitur hendrerit bibendum enim dignissim tempus. Suspendisse non ipsum auctor metus consectetur eleifend. Fusce cursus ullamcorper sem nec ultricies. Aliquam erat volutpat. Vivamus massa justo, pharetra et sodales quis, rhoncus in ligula. Integer dolor velit, ultrices in iaculis nec, viverra ut nunc.';
// Break it up into pieces 125 characters long
$lines = explode('|', wordwrap($text, 115, '|'));
// Starting Y position
$y = 513;
// Loop through the lines and place them on the image
foreach ($lines as $line)
{
imagettftext($image, $font_size, 0, 50, $y, $font_color, $font, $line);
// Increment Y so the next line is below the previous line
$y += 23;
}
?>
[#9] eee ess c p 9 9 AT yahoo DOT com [2010-09-29 15:46:29]
If you get letters cut off (clipped) by adjacent letters when using imagettftext with transparency (i.e., imagealphablending set to false), try setting imagealphablending back to TRUE before calling the imagettftext function.
<?php
$im = imagecreatetruecolor(300, 300);
imagealphablending($im, false);
imagesavealpha($im, true);
// Create colors and draw transparent background
$trans = imagecolorallocatealpha($im, 255, 255, 255, 127);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 299, 299, $trans);
// Bad text
imagettftext($im, 22, 0, 50, 100, $black, 'arial.ttf', 'Bad: Oj Pj wj');
// Good text
imagealphablending($im, true);
imagettftext($im, 22, 0, 50, 150, $black, 'arial.ttf', 'Good: Oj Pj wj');
// Output PNG
header("Content-type: image/png");
imagepng($im);
imagedestroy($im);
?>
[#10] Endeer [2010-06-12 04:22:04]
If latin characters with accents don't work for you (blank characters or rectangles), then it may be perhaps caused by PHP being compiled with --enable-gd-jis-conv. Verified on PHP 5.2.13.
[#11] Amir [2010-05-06 18:09:17]
In order to pass text of RTL language to imagettftext function, I used this function.
<?php
function revUni($text) {
$wordsArray = explode(" ", $text);
$rtlCompleteText='';
for ($i = sizeOf($wordsArray); $i > -1; $i = $i-1) {
//$lettersArray = explode("|", str_replace(";|", ";", $wordsArray[$i]));
$lettersArray = explode(";", $wordsArray[$i]);
$rtlWord='';
for ($k = sizeOf($lettersArray); $k > -1; $k = $k-1) {
if (strlen($lettersArray[$k]) > 1) { // make sure its full unicode letter
$rtlWord = $rtlWord."".$lettersArray[$k].";";
}
}
$rtlCompleteText = $rtlCompleteText." ".$rtlWord;
}
return $rtlCompleteText;
}
?>
[#12] JohnB [2010-02-28 23:58:00]
Just in case you were--like me--unaware of this, in Windows, ttf fonts don't necessarily antialias at all font sizes. Arial appears to work at all sizes but Calibri, for example, only antialiases at a point size of 8 and then at all sizes 16 and up. Not only that but at fonts sizes like 10 and 12 characters don't print at the expected angle: the characters are all printed upright on an angled baseline.
[#13] adam at worldwrestlingmania dot cjb dot net [2009-12-05 20:35:25]
Here's a good number verification captcha i just made:
1. on the page/s it will be used on, enter:
<?php
$pageToGo = "http://example.com/" #the page to go to if captcha correct
if ($_POST["captchaused"] == "true")
{
if ($_POST["numcaptcha"] == $_POST["captcha"])
{
header('Location: ' . $pageToGo);
}
else
{
echo '<form action="' . $_SERVER['php_self'] . '" method="post">';
$text = mt_rand();
echo '<input type="hidden" name="captchaused" value="true" />';
echo '<input type="hidden" name="numcaptcha" value="' . $text . '" />';
echo 'Enter the numbers you see: <br><input type="text" name="captcha" />';
require_once('numcaptcha.php');
echo '<input type="submit" value="enter site" /></form>';
}
?>
2. create a page called numcaptcha.php and enter:
<?php
header('Content-type: image/png');
$im = imagecreatetruecolor(400, 30);
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 399, 29, $white);
imagettftext($im, 20, 0, 11, 21, $grey, $font, $text);
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);
imagepng($im);
imagedestroy($im);
?>
it might have a few security issues but it still works fine.
[#14] web at evanreeves dot com [2009-05-22 12:50:23]
I was having trouble trying to render non antialiased text using a pixel font. The tips about setting a negative value for the color are valid, but I was still having trouble with the text I was trying to render because it was black. I discovered that if I changed the imagecolorallocate() function from:
$color = imagecolorallocate($base, 0, 0, 0);
to
$color = imagecolorallocate($base, 1, 1, 1); (near black)
and then used the negative value for the color in imagettftext(), it would work properly. The difference is that my first implementation set $color = 0. Obviously, you can't have $color = -0, it made no difference. When I switched to (1,1,1) it became $color = 1 which I could take a negative value for.
[#15] nadavkav at gmail dot com [2009-05-21 05:32:04]
for passing hebrew (and maybe other rtl language text) you can use the following code (as suggested by udi and which worked for me) :
<?php
$returnedtext = iconv("ISO-8859-8", "UTF-8", hebrev(iconv("UTF-8", "ISO-8859-8", $originaltext)));
?>
[#16] philip at webdesco dot com [2009-04-29 05:51:22]
Hi,
for the dummies (like myself) if you are having problems including your font file, prefix the file name with ./
On my development server the following worked fine
$myfont = "coolfont.ttf";
on my hosting server the only way i could get the font to work was as follows
$myfont = "./coolfont.ttf";
hope this helps someone out!
[#17] ben at spooty dot net [2009-03-11 06:40:44]
Here's a simple function to wrap text going into an image. It'll wrap onto as many lines as it needs to, but $angle has to be zero. The $width parameter is the width of the image.
<?php
function wrap($fontSize, $angle, $fontFace, $string, $width){
$ret = "";
$arr = explode(' ', $string);
foreach ( $arr as $word ){
$teststring = $ret.' '.$word;
$testbox = imagettfbbox($fontSize, $angle, $fontFace, $teststring);
if ( $testbox[2] > $width ){
$ret.=($ret==""?"":"\n").$word;
} else {
$ret.=($ret==""?"":' ').$word;
}
}
return $ret;
}
?>
[#18] roland dot hentschel at t-online dot de [2008-11-21 03:53:41]
Hi!
I played around with that multi-line-script "makeImageF".
Added some features, mainly: you can read text-files
or add text as parameter - eg :
imagettftext.php?file=test.txt
imagettftext.php?text=hello|world!
have fun!
======================================
<?php
$type = $_REQUEST['type'] ? $_REQUEST['type'] : "png";
switch($type) {
case "gif" :
header("Content-type: image/gif");
imageGIF(imagettfpostext($text, $font,
$fsize, $pos, $rgb),"wm.gif", 9); break;
case "png" :
header("Content-type: image/png");
imagePNG(imagettfpostext($text, $font,
$fsize, $pos, $rgb),"wm.png", 9); break;
}
function rgb2hex($rgb) {
$color = array("black"=>"#000", "grn"=>"#090",
"red"=>"#f00", "blu"=>"00f");
$trans = array("a"=>"10", "b"=>"11", "c"=>"12",
"d"=>"13", "e"=>"14", "f"=>"15");
$hex = array();
$rgb = str_replace("#","",
str_replace(array_keys($color), array_values($color), strtolower($rgb)));
for ($x=0; $x<strlen($rgb); $x++)
$hex[] = strtr($rgb[$x],$trans);
if (count($hex)==3) {
$hex[5] = $hex[2]; $hex[4] = $hex[2];
$hex[3] = $hex[1]; $hex[2] = $hex[1];
$hex[1] = $hex[0];
};
$hex = ($hex[0]*16+$hex[1])
."x".($hex[2]*16+$hex[3])
."x".($hex[4]*16+$hex[5]);
return $hex;
}
$file = $_GET['file']
? $_GET['file'] : "logo.txt";
if ($_GET['file']) {
$fp = @fopen($file, "r");
while (!feof($fp)) $text .= fgets($fp); fclose($fp);
} else $text = str_replace("|","\n",$_GET['text']);
$pos = $_GET['pos']
? $_GET['pos'] : 0;
$font = $_GET['font']
? "./fonts/".$_GET['font'].".ttf" : "./fonts/verdana.ttf";
$fsize = $_GET['fsize']
? $_GET['fsize'] : 12;
$rgb = $_GET['rgb']
? $_GET['rgb'] : "#ff9,#393";
imagepng(imagettfpostext($text, $font, $fsize, $pos, $rgb));
function imagettfpostext($text, $font, $fsize, $pos, $rgb,
$Leading=0, $W=0, $H=0, $X=0, $Y=0) {
$angle = 0;
$_bx = imageTTFBbox($fsize,0,$font,$text);
$str = split("[\n]+",$text);
$nL = count($str);
$W = ($W==0)
? abs($_bx[2]-$_bx[0])
: $W;
$H = ($H==0)
? abs($_bx[5]-$_bx[3])+($nL>1
? ($nL*$Leading)
: 0)
: $H;
$im = @imagecreate($W, $H)
or die("Cannot Initialize new GD image stream");
$rgb = explode(",",$rgb);
$tc = explode("x",rgb2hex($rgb[1]));
$bc=explode("x",rgb2hex($rgb[0]));
$bc = imagecolorallocate($im, $bc[0], $bc[1], $bc[2]);
$tc = imagecolorallocate($im, $tc[0], $tc[1], $tc[2]);
if ($pos == 0) {
imagettftext($im, $fsize, $angle, $X,
$fsize, $tc, $font, $text);
} else {
$alpha = range("a", "z");
$alpha = $alpha.strtoupper($alpha).range(0, 9);
$_b = imageTTFBbox($fsize, 0, $font, $alpha);
$_H = abs($_b[5]-$_b[3]);
$__H = 0;
for ($i=0; $i<$nL; $i++) {
$_b = imageTTFBbox($fsize, 0, $font, $str[$i]);
$_W = abs($_b[2]-$_b[0]);
if ($pos == 1) $_X = $W-$_W;
else $_X = abs($W/2)-abs($_W/2);
$__H += $_H;
imagettftext($im, $fsize, $angle, $_X, $__H,
$tc, $font, $str[$i]);
$__H += $Leading;
}
}
if ($_REQUEST["trans"]) {
$bg_color = ImageColorAt($im,1,1);
ImageColorTransparent($im, $bg_color);
}
return $im;
}
?>
[#19] cameron at prolifique dot com [2008-10-02 20:59:25]
"php at yvanrodrigues dot com" is right...this function is not reliable on extended characters. User beware.
In my case, it produced different results with OpenType vs. TrueType versions of the same font. (Converted my OT font to TT using FontForge as suggested. Strangely, the resulting TT font file was twice as big as the OT version and didn't look the same...heavier weight and slightly different spacing.) While the TT version was more accurate at displaying certain characters, neither was totally reliable, both yielding boxes in place of perfectly valid character glyphs that I could verify existed in the font. (Both fonts showed the same characters perfectly on an HTML page with UTF-8 charset.)
What's more, using this same function with the same font on our development vs. production server also produced different results: some chars worked on dev but not production. Stranger still, the font spacing and size were slightly different between the two. Font file is identical. Dev server is Linux, production server is Windows, but should that matter? Suspect it has more to do with differing versions of FreeType (2.1 vs. 1.9 respectively).
Anyway, careful with this function...best to stick within the rather small range of safe characters and avoid anything else.
[#20] php at yvanrodrigues dot com [2008-09-05 07:10:17]
After many hours of failure may I suggest:
This function will work on OpenType fonts with Postscript outlines, but from what I can tell, characters > ASCII 127 do not display correctly or at all, even if the text is correctly coded as UTF-8.
Converting the font to truetype or possibly OpenType with truetype outlines; or buying the font as such fixes the problem.
I used FontForge to open the otf and export as ttf and it works perfectly.
[#21] s.pynenburg _at_ gm ail dotcom [2008-08-07 07:31:00]
I had an image generator where the user could position where they wanted the text to begin - however it kept going off the side of an image. So I made this basic function: it measures if the inputted text and x-position will cause the string to go off the edge, and if so, it will fit as much as it can on the first line, then go down to the next one.
Limitations:
-It only performs this once (i.e. it won't split into three lines)
-I'm pretty sure it won't work with angled text.
<?PHP
function imagettftextwrap($im, $size, $angle, $x_pos, $y_pos, $color, $font, $instr)
{
$box = @imagettfbbox($size, 0, $font, $instr);
$width = abs($box[4] - $box[0]);
$height = abs($box[3] - $box[5]);
$overlap = (($x_pos + $width) - imagesx($im));
if($overlap > 0) //if the text doesn't fit on the image
{
$chars = str_split($instr);
$str = "";
$pstr = "";
for($m=0; $m < sizeof($chars); $m++)
{
$bo = imagettfbbox($fsize1, 0, $font1, $str);
$wid = abs($bo[4] - $bo[0]);
if(($x_pos + $wid) < imagesx($im)) //add one char from the string as long as it's not overflowing
{
$pstr .= $chars[$m];
$bo2 = imagettfbbox($fsize1, 0, $font1, $pstr);
$wid2 = abs($bo2[4] - $bo2[0]);
if(($x_pos + $wid2) < imagesx($im))
{
$str .= $chars[$m];
}
else
{
break;
}
}
else
{
break;
}
}
$restof = "";
for($l=$m; $l < sizeof($chars); $l++)
{
$restof .= $chars[$l]; //add the rest of the string to a new line
}
imagettftext($im, $size, $angle, $x_pos, $y_pos, $color, $font, $str); // print out the smaller line
imagettftext($im, $size, $angle, 0, $y_pos + $height, $color, $font, $restof); //and the rest of it
}
else
{
imagettftext($im, $size, $angle, $x_pos, $y_pos, $color, $font, $instr); //otherwise just do normally
}
}
?>
[#22] sk89q [2008-08-01 01:03:32]
I updated my imagettftextbox function considerably. It fixes the problems of the older imagettftextbox code I uploaded a few months ago (that's now gone).
You can get it here:
http://sk89q.therisenrealm.com/2008/08/ttf-textbox-in-php/
It has both horizontal and vertical alignment, custom line spacing, borders, width, height, etc.
[#23] Stefan at colulus dot com [2008-05-20 10:40:52]
I worked out a script the allows the transfer of alphanumeric data to be placed on an image. The HTML feature is img src and the php feature is imagettftext. This simple code will increment from 1 to 3 on images.
code:
<?php
//ImageCall.php -- This script will call a script to produce the image.
for($next = 1;$next < 4; $next++){
print "Image $next:<br>";
print "<img src = 'Image.php?\$text=$next'>";
print "<br><br>";
}
?>
<?php
//Image.php -- This script creates a square image and places the text on it.
// image size and color
$im = ImageCreate(77,77);
$color1 = ImageColorAllocate($im,0x66,0xCC,0x00);
$color2 = ImageColorAllocate($im,0x33,0x66,0x00);
$color3 = ImageColorAllocate($im,0x00,0x99,0x00);
$color4 = ImageColorAllocate($im,0x3D,0x3D,0x3D);
// image creation
ImageFilledRectangle($im,1,1,76,76,$color1);
ImageFilledpolygon($im, array (76,1,1,76,76,76),3,$color2);
ImageFilledRectangle($im,5,5,72,72,$color3);
// determine numeric center of image
$size = ImageTTFBBox(45,0,'impact',$_GET['$text']);
$X = (77 - (abs($size[2]- $size[0])))/2;
$Y = ((77 - (abs($size[5] - $size[3])))/2 + (abs($size[5] - $size[3])));
//places numeric information on image
ImageTTFText($im,45,0,($X-1),$Y,$color4,'impact',$_GET['$text']);
//returns completed image to calling script
Header('Content-Type: image/png');
Imagepng($im);
?>
[#24] Valentijn de Pagter [2008-05-16 10:13:34]
If you're looking for easy text alignment, you need to use the imagettfbbox() command. When given the correct parameters, it will return the boundaries of your to-be-made text field in an array, which will allow you to calculate the x and y coordinate that you need to use for centering or aligning your text.
A horizontal centering example:
<?php
$tb = imagettfbbox(17, 0, 'airlock.ttf', 'Hello world!');
?>
$tb would contain:
Array
(
[0] => 0 // lower left X coordinate
[1] => -1 // lower left Y coordinate
[2] => 198 // lower right X coordinate
[3] => -1 // lower right Y coordinate
[4] => 198 // upper right X coordinate
[5] => -20 // upper right Y coordinate
[6] => 0 // upper left X coordinate
[7] => -20 // upper left Y coordinate
)
For horizontal alignment, we need to substract the "text box's" width { $tb[2] or $tb[4] } from the image's width and then substract by two.
Saying you have a 200px wide image, you could do something like this:
<?php
$x = ceil((200 - $tb[2]) / 2); // lower left X coordinate for text
imagettftext($im, 17, 0, $x, $y, $tc, 'airlock.ttf', 'Hello world!'); // write text to image
?>
This'll give you perfect horizontal center alignment for your text, give or take 1 pixel. Have fun!
[#25] damititi at gmail dot com [2008-04-22 13:21:06]
First of all, thanks sk89q for the func! it was exactly I was looking for.
I made a change. Depending on the letter, the text were incorrect vertical aligned.
I replace the line:
$line_height = $dimensions[1] - $dimensions[7];
for the following:
$line_height = $size+4;
No matter if mama or jeje is written, the vertical position will be the same.
[#26] sk89q [2008-03-14 15:36:33]
Here is an update to my imagettftextwrapped function. I had posted the old version that cut off lines if it wordwrapped.
Here's a new version with the bug fixed, a list of arguments closer to imagettftext(), and partial angle support (the text is angled, but the left margins for each line are not adjusted for the angle).
It's a function I wrote a few years ago to do unjustified aligned text.
<?php
define("ALIGN_LEFT", "left");
define("ALIGN_CENTER", "center");
define("ALIGN_RIGHT", "right");
function imagettftextbox(&$image, $size, $angle, $left, $top, $color, $font, $text, $max_width)
{
$text_lines = explode("\n", $text); // Supports manual line breaks!
$lines = array();
$line_widths = array();
$largest_line_height = 0;
foreach($text_lines as $block)
{
$current_line = ''; // Reset current line
$words = explode(' ', $block); // Split the text into an array of single words
$first_word = TRUE;
$last_width = 0;
for($i = 0; $i < count($words); $i++)
{
$item = $words[$i];
$dimensions = imagettfbbox($size, $angle, $font, $current_line . ($first_word ? '' : ' ') . $item);
$line_width = $dimensions[2] - $dimensions[0];
$line_height = $dimensions[1] - $dimensions[7];
if($line_height > $largest_line_height) $largest_line_height = $line_height;
if($line_width > $max_width && !$first_word)
{
$lines[] = $current_line;
$line_widths[] = $last_width ? $last_width : $line_width;
$current_line = $item;
}
else
{
$current_line .= ($first_word ? '' : ' ') . $item;
}
if($i == count($words) - 1)
{
$lines[] = $current_line;
$line_widths[] = $line_width;
}
$last_width = $line_width;
$first_word = FALSE;
}
if($current_line)
{
$current_line = $item;
}
}
$i = 0;
foreach($lines as $line)
{
if($align == ALIGN_CENTER)
{
$left_offset = ($max_width - $line_widths[$i]) / 2;
}
elseif($align == ALIGN_RIGHT)
{
$left_offset = ($max_width - $line_widths[$i]);
}
imagettftext($image, $size, $angle, $left + $left_offset, $top + $largest_line_height + ($largest_line_height * $i), $color, $font, $line);
$i++;
}
return $largest_line_height * count($lines);
}
?>
[#27] llewellyntd at gmail dot com [2008-03-12 03:27:01]
Hi All,
I struggled for moths to do a decent text warp with GD lib. Here is the code that I made use of:
<?php
//word wrap
$warpText = wordwrap($text, 30, "\n");
//display text
imagettftext($image, $fontSize, 0, $x, $y, $fontColor, $font, $warpText);
?>
Hope this helps somebody.
Cheers
[#28] m0r1arty at mail dot ru [2008-02-13 10:50:09]
Sorry my English.
I have trouble with using imagettftext under Windows.
I can't used short name of fonts(example "arial","arialbd.ttf" etc). PHP say what not find this font.
Manipulation with environment GDFONTPATH lost.
This is my solution
<?php
$dir=opendir('./font/');//directory with fonts
if($dir)
while($f=readdir($dir)){
if(preg_match('/\.ttf$/',$f)){
$font=explode('.',$f);
define($font[0],realpath('./font/'.$f));
}
}
if($dir)
closedir($dir);
?>
Directory "font" have two file: arial.ttf and arialbd.ttf
Now one can using constant font name by calling imagettftext:
imagettftext($img,12,0,25,28,$color,arialbd,'some text');
[#29] matt at mmkennedy dot net [2008-01-17 19:11:07]
For anyone attempting to print black barcodes, and trying to turn of anti-aliasing, remember that -1 * [0,0,0] is 0, not -0.
[#30] denis at reddodo dot com [2007-12-24 06:05:08]
Small but very dangerous bug in function ttfWordWrappedText, written by waage, just try ttfWordWrappedText("aaaaa\naa",4) and your script will run into endless loop.
You can fix it with code below:
<?php
function ttfWordWrappedText_fixed($text, $strlen = 8) {
$text = urldecode($text);
$text = explode("\n", $text);
$i = 0;
foreach($text as $text)
{
while(strlen($text) > $strlen && strstr($text, ' ') !== FALSE) {
$startPoint = strpos($text, ' ');
$line[$i][] =substr($text,0,$startPoint);
$text = trim(strstr($text, ' '));
}
$line[$i][] = trim($text);
}
$line[$i][] = trim($text);
$i++;
}
return $line;
}
?>
better solutions is to check input text for lines longer than needed wrap point.
[#31] denis at reddodo dot com [2007-12-24 05:46:14]
Small but very dangerous bug in function ttfWordWrappedText, written by waage, just try ttfWordWrappedText("aaaaa\naa",4) and your script will run into endless loop.
You can fix it with code below:
<?php
function ttfWordWrappedText_fixed($text, $strlen = 8) {
$text = urldecode($text);
$text = explode("\n", $text);
$i = 0;
foreach($text as $text)
{
while(strlen($text) > $strlen && stristr($text, ' ') !== FALSE) {
$startPoint = $strlen - 1;
while(substr($text, $startPoint, 1) != " ") {
$startPoint--;
}
$line[$i][] = trim(substr($text, 0, $startPoint));
$text = substr($text, $startPoint);
}
$line[$i][] = trim($text);
$i++;
}
return $line;
}
?>
better solutions is to check input text for lines longer than needed wrap point.
[#32] dotpointer [2007-12-09 04:40:35]
For those trying to disable the font smoothing or font cleartype:ing, take a look at the color parameter for this function. The correct word for what you're looking for is antialiasing.
[#33] Anonymous [2007-11-16 04:14:40]
Just to comment on Sohel Taslims great function...
if anyone needs to add BACKGROUND TRANSPARENCY to this kind of function (which almost does everyone one would want already) then add
$bg_color = imagecolorat($im,1,1);
imagecolortransparent($im, $bg_color);
ABOVE the "if($L_R_C == 0){ //Justify Left" line
[#34] waage [2007-11-07 07:31:55]
I had some issues trying to get both word wrapping and new line detection but with some of the help from the comments below i got this. (thanks to jwe for the main part of the code here)
<?php
function ttfWordWrappedText($text, $strlen = 38) {
$text = urldecode($text);
$text = explode("\n", $text);
$i = 0;
foreach($text as $text)
{
while(strlen($text) > $strlen) {
$startPoint = $strlen - 1;
while(substr($text, $startPoint, 1) != " ") {
$startPoint--;
}
$line[$i][] = trim(substr($text, 0, $startPoint));
$text = substr($text, $startPoint);
}
$line[$i][] = trim($text);
$i++;
}
return $line;
}
?>
This returns an array for each newline entered and subarray for each wordwrapped line to print.
ie.
Array
(
[0] => Array
(
[0] => This is the first long line
[1] => that i entered.
)
[1] => Array
(
[0] => And this is the new line after that.
)
)
[#35] mitch at electricpulp dot com [2007-09-20 07:35:29]
If you're having issues with fonts not working... (Could not find/open font) check your permissions on the folder/font files and make sure they're 775, especially if you've just pulled them from a windows box. Hope this helps!
[#36] Ole Clausen [2007-09-11 09:11:37]
Comment to: Sohel Taslim (03-Aug-2007 06:19)
Thanks for the function which I have modified a bit. In the new version the lines have equal space between them (the g's in your example create bigger space between the lines) - set by the parameter '$Leading'.
I have used the for-loop for better performance and slimmed the rest a little :)
function imagettfJustifytext($text, $font="CENTURY.TTF", $Justify=2, $Leading=0, $W=0, $H=0, $X=0, $Y=0, $fsize=12, $color=array(0x0,0x0,0x0), $bgcolor=array(0xFF,0xFF,0xFF)){
$angle = 0;
$_bx = imageTTFBbox($fsize,0,$font,$text);
$s = split("[\n]+", $text); // Array of lines
$nL = count($s); // Number of lines
$W = ($W==0)?abs($_bx[2]-$_bx[0]):$W; // If Width not initialized by programmer then it will detect and assign perfect width.
$H = ($H==0)?abs($_bx[5]-$_bx[3])+($nL>1?($nL*$Leading):0):$H; // If Height not initialized by programmer then it will detect and assign perfect height.
$im = @imagecreate($W, $H)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, $bgcolor[0], $bgcolor[1], $bgcolor[2]); // RGB color background.
$text_color = imagecolorallocate($im, $color[0], $color[1], $color[2]); // RGB color text.
if ($Justify == 0){ //Justify Left
imagettftext($im, $fsize, $angle, $X, $fsize, $text_color, $font, $text);
} else {
// Create alpha-nummeric string with all international characters - both upper- and lowercase
$alpha = range("a", "z");
$alpha = $alpha.strtoupper($alpha).range(0, 9);
// Use the string to determine the height of a line
$_b = imageTTFBbox($fsize,0,$font,$alpha);
$_H = abs($_b[5]-$_b[3]);
$__H=0;
for ($i=0; $i<$nL; $i++) {
$_b = imageTTFBbox($fsize,0,$font,$s[$i]);
$_W = abs($_b[2]-$_b[0]);
//Defining the X coordinate.
if ($Justify == 1) $_X = $W-$_W; // Justify Right
else $_X = abs($W/2)-abs($_W/2); // Justify Center
//Defining the Y coordinate.
$__H += $_H;
imagettftext($im, $fsize, $angle, $_X, $__H, $text_color, $font, $s[$i]);
$__H += $Leading;
}
}
return $im;
}
[#37] Sohel Taslim [2007-08-02 21:19:32]
Left Right Center align/justify of text in image. It is easy and simple to do in PHP.
Create an image from text and align them as you want. After that save or display image.
<?php
//Example call.
$str = "New life in programming.\nNext Line of Image.\nLine Number 3\n" .
"This is line numbet 4\nLine number 5\nYou can write as you want.";
header("Content-type: image/gif");
imagegif(imagettfJustifytext($str,"CENTURY.TTF",2));
//End of example.
function imagettfJustifytext($text, $font="CENTURY.TTF", $Justify=2, $W=0, $H=0, $X=0, $Y=0, $fsize=12, $color=array(0x0,0x0,0x0), $bgcolor=array(0xFF,0xFF,0xFF)){
$angle = 0;
$L_R_C = $Justify;
$_bx = imageTTFBbox($fsize,0,$font,$text);
$W = ($W==0)?abs($_bx[2]-$_bx[0]):$W; //If Height not initialized by programmer then it will detect and assign perfect height.
$H = ($H==0)?abs($_bx[5]-$_bx[3]):$H; //If Width not initialized by programmer then it will detect and assign perfect width.
$im = @imagecreate($W, $H)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, $bgcolor[0], $bgcolor[1], $bgcolor[2]); //RGB color background.
$text_color = imagecolorallocate($im, $color[0], $color[1], $color[2]); //RGB color text.
if($L_R_C == 0){ //Justify Left
imagettftext($im, $fsize, $angle, $X, $fsize, $text_color, $font, $text);
}elseif($L_R_C == 1){ //Justify Right
$s = split("[\n]+", $text);
$__H=0;
foreach($s as $key=>$val){
$_b = imageTTFBbox($fsize,0,$font,$val);
$_W = abs($_b[2]-$_b[0]);
//Defining the X coordinate.
$_X = $W-$_W;
//Defining the Y coordinate.
$_H = abs($_b[5]-$_b[3]);
$__H += $_H;
imagettftext($im, $fsize, $angle, $_X, $__H, $text_color, $font, $val);
$__H += 6;
}
}
elseif($L_R_C == 2){ //Justify Center
$s = split("[\n]+", $text);
$__H=0;
foreach($s as $key=>$val){
$_b = imageTTFBbox($fsize,0,$font,$val);
$_W = abs($_b[2]-$_b[0]);
//Defining the X coordinate.
$_X = abs($W/2)-abs($_W/2);
//Defining the Y coordinate.
$_H = abs($_b[5]-$_b[3]);
$__H += $_H;
imagettftext($im, $fsize, $angle, $_X, $__H, $text_color, $font, $val);
$__H += 6;
}
}
return $im;
}
?>
[#38] Borgso [2007-07-27 16:30:06]
Right align out of "webmaster at higher-designs dot com" code
<?php
$color = imagecolorallocate($im, 0, 0, 0);
$font = 'visitor.ttf';
$fontsize = "12";
$fontangle = "0";
$imagewidth = imagesx($im);
$imageheight = imagesy($im);
$text = "My right align text";
$box = @imageTTFBbox($fontsize,$fontangle,$font,$text);
$textwidth = abs($box[4] - $box[0]);
$textheight = abs($box[5] - $box[1]);
$xcord = $imagewidth - ($textwidth)-2; // 2 = some space from right side.
$ycord = ($imageheight/2)+($textheight/2);
ImageTTFText ($im, $fontsize, $fontangle, $xcord, $ycord, $black, $font, $text);
?>
[#39] Lassial at the google mail dot com [2007-06-13 00:42:20]
Creating multiline text with GD is bit complicated, one of the issues I've ran to is how to set line spacing, a normal feature in all type setting (even type writers). By default, line spacing with imagettftext seems to be 150 % or more, too much for me anyhow. Thus I've used the function below to get the lines closer to each other. By default, it appears to create 100 % linespacing, but it has not been tested thoroughly.
null imagettfmultilinetext
(resource $image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text , $spacing)
spacing is a coefficient, comparable to Line spacing in a word processors or graphics software, causing a shift relative to font size in the line spacing
<?php
function imagettfmultilinetext($image, $size, $angle, $x, $y, $color, $fontfile, $text, $spacing=1)
{
$lines=explode("\n",$text);
for($i=0; $i< count($lines); $i++)
{
$newY=$y+($i * $size * $spacing);
imagettftext($image, $size, $angle, $x, $newY, $color, $fontfile, $lines[$i], $spacing);
}
return null;
}
?>
[#40] php at gilbertson dot me dot uk [2007-06-01 13:52:32]
Users may note a problem trying to use this function to display the Euro symbol.
The reason is that it is a late addition. Although the operating systems generally recognise code 0x80 (128 decimal) as Euro, this is not where it necessarily appears in the font. Some have it there, but many just have it in the extended character set at position 0x20AC (8364 decimal).
I have yet to find a font with it only at 0x80, so here is the fix:
<?php
$image=imagecreate(135,24);
$bg=imagecolorallocate($image,0,0,0);
$fg=imagecolorallocate($image,0,255,0);
$text = 'coffee - ?3.50';
$friendly = eurofix($text);
imagettftext($image,16,0,5,20,$fg,"Papyrus.ttf",$friendly);
imagegif ($image);
imagedestroy ($image);
function eurofix($str) {
$euro=utf8_encode('€');
$str = preg_replace('/\x80/',$euro,$str);
return ($str);
}
?>
You should note, however, this won't help with fonts older than about 1999. It can only make sure the Euro is displayed where available.
[#41] lassial at gmail dot com [2007-05-10 06:56:30]
Roy van Arem suggested a neat code for listing TTFs on a machine. However, it has some problems (such as lower and upper case distinction of file extension and defective fonts) that I have corrected in the following script, which can be implemented as a single PHP script (name as you like):
<?php //make sure there are no blank lines above
$ffolder="/usr/local/bin/fonts"; //The directory where your fonts reside
if (empty($_GET['f']))
{
$folder=dir($ffolder); //open directory
echo "<HTML><BODY>\n";
while($font=$folder->read())
if(stristr($font,'.ttf')) //only ttf fonts
$fonts[]=$font;
$folder->close();
if (!empty($fonts))
{
echo "<table><tr><th colspan='2'>Fonts available in $ffolder</th></tr>"
."\n<tr><th>Name</th><th>Appereance</th>";
sort($fonts);
foreach ($fonts as $font)
echo "<tr><td>$font</td><td> <IMG src='".$_SERVER['SCRIPT_NAME']
."?f=$font'></td></tr>\n";
}
else echo "No fonts found from $ffolder";
echo "\n</HTML></BODY>";
}
else
{
$im=@imagecreatetruecolor(200,30)
or die("Cannot Initialize new GD image stream");
$black=imagecolorallocate($im,0,0,0);
$white=imagecolorallocate($im,255,255,255);
imagefill($im,0,0,$white);
imagettftext($im,14,0,5,25,$black, "$ffolder/".$_GET['f'] , $_GET['f']);
header("Content-type: image/png");
header('Content-Length: ' . strlen($im));
imagepng($im);
imagedestroy($im);
}
?>
[#42] ultraniblet at gmail dot com [2007-05-05 13:08:32]
I have found the kerning (spacing between letters) pretty poor with GD - it's not up to your average designer's standards. Here are some ways to improve it:
- Place the letters one by one using their bounding box instead of using one string
- adjust with a $kerning value
- For small text, sample it down from a larger size to adjust in increments less than 1px
Eg:
<?PHP
$STRING = "NOTRE PHILOSOPHIE";
// ---- PRESETS
$FONT = "CantoriaMTStd-SemiBold.otf";
$FONT_SIZE = 10.5;
$WIDTH = 200;
$HEIGHT = 16;
$KERNING = 0;
$BASELINE = 12;
$BG_COLOR = array(
"R"=>5,
"G"=>45,
"B"=>53
);
$TXT_COLOR = array(
"R"=>188,
"G"=>189,
"B"=>0
);
// ---- CREATE CANVAS + PALETTE
$canvas = imageCreateTrueColor($WIDTH*4,$HEIGHT*4);
$bg_color = imageColorAllocate($canvas, $BG_COLOR["R"], $BG_COLOR["G"], $BG_COLOR["B"]);
$txt_color = imageColorAllocate($canvas, $TXT_COLOR["R"], $TXT_COLOR["G"], $TXT_COLOR["B"]);
imagefill ( $canvas, 0, 0, $bg_color );
// ---- DRAW
$array = str_split($STRING);
$hpos = 0;
for($i=0; $i<count($array); $i++)
{
$bbox = imagettftext( $canvas, $FONT_SIZE*4, 0, $hpos, $BASELINE*4, $txt_color, $FONT, $array[$i] );
$hpos = $bbox[2]+$KERNING;
}
// ---- SAMPLE DOWN & OUTPUT
$final = imageCreateTrueColor($WIDTH,$HEIGHT);
imageCopyResampled( $final, $canvas, 0,0,0,0, $WIDTH, $HEIGHT, $WIDTH*4, $HEIGHT*4 );
header('Content-type: image/png');
imagePNG($final);
imageDestroy($canvas);
imageDestroy($final);
?>
[#43] Roy van Arem [2006-11-26 20:01:48]
If you want to display a list of fonts in a directory and see what they look like, you could do something like this:
<HTML><BODY>
<?php
$folder=dir("fonts/"); //The directory where your fonts reside
while($font=$folder->read())
{
if(stristr($font,'.ttf'))echo '<IMG SRC="img.php?'.substr($font,0,strpos($font,'.')).'">'; //only ttf fonts
}
$folder->close();
?>
</BODY></HTML>
The file for 'img.php' should be something like this:
<?php
$font=$_SERVER["QUERY_STRING"];
header("Content-type: image/png");
$im=@imagecreatetruecolor(200,30)or die("Cannot Initialize new GD image stream");
$black=imagecolorallocate($im,0,0,0);
$white=imagecolorallocate($im,255,255,255);
imagefill($im,0,0,$white);
imagettftext($im,18,0,5,25,$black,"fonts/".$font,$font);
imagepng($im);
imagedestroy($im);
?>
Something similar I implemented at http://font.beginstart.com
[#44] ben at evolutioncomputing co uk [2006-11-05 13:25:32]
A centralised text watermark - of any length, that automatically sizes to about 70% of the width, and can be rotated to any angle.
<?php
$Image = @ImageCreateFromJPEG ("YourImage.jpg") ;
$sx = imagesx($Image) ;
$sy = imagesy($Image) ;
if ($WatermarkNeeded)
{
$Text="Copyright Ben Clay" ;
$Font="arial.ttf" ;
$FontColor = ImageColorAllocate ($Image,255,255,255) ;
$FontShadow = ImageColorAllocate ($Image,0,0,0) ;
$Rotation = 30 ;
$OriginalImage = ImageCreateTrueColor($sx,$sy) ;
ImageCopy ($OriginalImage,$Image,0,0,0,0,$sx,$sy) ;
$FontSize=1 ;
do
{
$FontSize *= 1.1 ;
$Box = @ImageTTFBBox($FontSize,0,$Font,$Text);
$TextWidth = abs($Box[4] - $Box[0]) ;
$TextHeight = abs($Box[5] - $Box[1]) ;
}
while ($TextWidth < $sx*0.7) ;
$x = $sx/2 - cos(deg2rad($Rotation))*$TextWidth/2 ;
$y = $sy/2 + sin(deg2rad($Rotation))*$TextWidth/2 + cos(deg2rad($Rotation))*$TextHeight/2 ;
ImageTTFText ($Image,$FontSize,$Rotation,$x+4,$y+4,$FontShadow,$Font,$Text);
ImageTTFText ($Image,$FontSize,$Rotation,$x,$y,$FontColor,$Font,$Text);
ImageCopyMerge ($Image,$OriginalImage,0,0,0,0,$sx,$sy,50) ;
}
ImageJPEG ($Image) ;
?>
[#45] Tom Pike [2006-10-04 08:48:23]
Ref: Craig at frostycoolslug dot com
"Using the negative of a color index has the effect of turning off antialiasing."
This is true, but only if the image has been created with imagecreate() (as opposed to imagecreatetruecolor())
[#46] Craig at frostycoolslug dot com [2006-09-28 07:54:29]
This one caught me out a little bit as confusing, so in an attempt to help others..
"Using the negative of a color index has the effect of turning off antialiasing."
Simply put:
<?php
$textColour = ImageColorAllocate($image, 255, 255, 255);
ImageTTFText($image, 8, 0, 0, 0, -$textColour, $font, $text);
?>
Note the - (minus) before the $textColor in ImageTTFText, this creates the negative colour index, and switches off AA on text.
[#47] webmaster at higher-designs dot com [2006-08-15 22:16:11]
I spent days looking for this, couldn't find it, so just made it myself. This is an ultra simple text banner that keeps the text pretty much centered (not perfect when text is angled) vertically and horizontally. Size, font, colors are easy to edit and in HTML version for the colors.
Any additions (maybe for multi-line functionality) can be added if you desire.
<?php
### Declare this script will be displayed as a PNG image.
header("Content-type: image/png");
####################### BEGIN USER EDITS #######################
$imagewidth = 500;
$imageheight = 100;
$fontsize = "20";
$fontangle = "0";
$font = "arial.ttf";
$text = "123456789";
$backgroundcolor = "003366";
$textcolor = "FFCC66";
######################## END USER EDITS ########################
### Convert HTML backgound color to RGB
if( eregi( "([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})", $backgroundcolor, $bgrgb ) )
{$bgred = hexdec( $bgrgb[1] ); $bggreen = hexdec( $bgrgb[2] ); $bgblue = hexdec( $bgrgb[3] );}
### Convert HTML text color to RGB
if( eregi( "([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})", $textcolor, $textrgb ) )
{$textred = hexdec( $textrgb[1] ); $textgreen = hexdec( $textrgb[2] ); $textblue = hexdec( $textrgb[3] );}
### Create image
$im = imagecreate( $imagewidth, $imageheight );
### Declare image's background color
$bgcolor = imagecolorallocate($im, $bgred,$bggreen,$bgblue);
### Declare image's text color
$fontcolor = imagecolorallocate($im, $textred,$textgreen,$textblue);
### Get exact dimensions of text string
$box = @imageTTFBbox($fontsize,$fontangle,$font,$text);
### Get width of text from dimensions
$textwidth = abs($box[4] - $box[0]);
### Get height of text from dimensions
$textheight = abs($box[5] - $box[1]);
### Get x-coordinate of centered text horizontally using length of the image and length of the text
$xcord = ($imagewidth/2)-($textwidth/2)-2;
### Get y-coordinate of centered text vertically using height of the image and height of the text
$ycord = ($imageheight/2)+($textheight/2);
### Declare completed image with colors, font, text, and text location
imagettftext ( $im, $fontsize, $fontangle, $xcord, $ycord, $fontcolor, $font, $text );
### Display completed image as PNG
imagepng($im);
### Close the image
imagedestroy($im);
?>
[#48] jwe [2006-07-24 11:48:09]
I found this line a little confusing:
"May include decimal numeric character references (of the form: €) to access characters in a font beyond position 127."
I was using a font that had apostrophes and quotes stored in a non-standard position, and so they were being rendered as spaces by imagettftext. This line seemed to suggest a solution, but it took a while to figure it out.
Turns out, a "decimal numeric character reference" is a decimal conversion of the hex value of the *unicode* position of the character you want. For a while I was trying ASCII positions (I knew the ALT+ code for typing the character I needed in Windows).
In the Windows XP character map, the unicode positions are shown as U+2018 or U+201C, etc. Ignore the U+ and convert that hex number to decimal, and then stick that in your text string with the &# on the front and ; on the end, and pass it to imagettftext.
--Julian
[#49] jwe [2006-07-18 20:48:58]
Quick tip for anyone who is receiving text like in the example in this page (ie: through $_GET['text'] or something similar) and needs to format the text into multiple lines. The trick is finding the spaces...
<?php
$text = $_GET['text'];
// for a maximum of 38 characters on a line...
while(strlen($text) > 38) {
$startPoint = 37;
// find a space to break the line on
while(substr($text, $startPoint, 1) != " ") {
$startPoint--;
}
$line[] = trim(substr($text, 0, $startPoint));
$text = substr($text, $startPoint);
}
$line[] = trim($text);
?>
The result is an array called $line that contains all the lines of text you need to output in order.
The only tasks left are to determine the correct height of the image based on the font size you want to use. Don't forget to leave some padding space for punctuation and descenders between lines (commas, g, q, p, y, etc).
imagettftext is unbelievably useful when you need to create header images using non-standard fonts. Amazing. Huge thanks to the devs.
--Julian
[#50] admin at sgssweb dot com [2006-05-01 04:08:05]
Another way of the bellow. After creating a child class of GMIPluggableSet class, which should override two method: getExpression() and getVariables(), throw it to a instance of FontImageGenerator class.
For example, the code follows:
<?php
require_once 'package.fig.php';
class SampleFontImagePluggableSet
extends GMIPluggableSet
{
var $defaultVariables = array(
"text" => null,
"size" => null,
"font" => null,
"color" => "0x000000",
"alpha" => "100",
"padding" => 0,
"width" => null,
"height" => null,
"align" => "left",
"valign" => "middle",
"bgcolor" => "0xffffff",
"antialias" => 4
);
function SampleFontImagePluggableSet() {
parent::GMIPluggableSet();
}
function getExpression() {
return "size {width}, {height};".
"autoresize none;".
"type gif, 256, {color: {bgcolor}};".
"padding {padding};".
"color {color: {bgcolor}};".
"fill;".
"color {color: {color}, {alpha}};".
"antialias {antialias};".
"font {font}, {size};".
"string {text}, 0, 0, {width}, {height}, {align}, {valign};";
}
function getVariables() {
return array_merge($this->defaultVariables, $_GET);
}
}
$pluggableSet = new SampleFontImagePluggableSet();
$fig = new FontImageGenerator();
$fig->setPluggableSet($pluggableSet);
$fig->execute();
?>
This output a image with the text defined in $_GET['text'], the font in $_GET['font'], the text color in $_GET['color'], the background in $_GET['bgcolor'], and so on.
The script file is available at: http://sgssweb.com/experiments/?file=PHPFontImageGenerator .
[#51] ugo dot quaisse at gmail dot com [2006-04-19 06:03:26]
This is a script that aim at center the (multi) lines :
<?php
header("Content-type: image/png");
//1line per column
$text=array(0=>"line 1",1=>"line 2");
$largeur=500;
$line_height=30;
$hauteur=sizeof($text)*$line_height;
// Create the image
$im = imagecreatetruecolor($largeur, $hauteur);
// Create some colors
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 225, 225, 225);
$blue = imagecolorallocate($im, 0, 62, 126);
imagefilledrectangle($im, 0, 0, $largeur, $hauteur, $white);
// Replace path by your own font path
$font = 'font.ttf';
for($i=0;$i<=sizeof($text);$i++) {
//Center the text
$size = imagettfbbox(20, 0, $font, $text[$i]);
$long_text = $size[2]+$size[0];
$posx=($largeur-$long_text)/2;
// Add the text
imagettftext($im, 20, 0, $posx, $line_height+$line_height*$i, $blue, $font, $text[$i]);
}
imagepng($im);
imagedestroy($im);
?>
[#52] mats dot engstrom at gmail dot com [2006-03-28 02:23:49]
I'll second the note from --colobri--.
Just adding --with-ttf and --with-freetype-dir=/usr/lib/ on the ./configure and then doing a "make; make install" is not enough.
I had to do a "make clean" and then a "make install" in order to get the FreeType-support enabled.
Here are my relevant ./configure lines:
--with-gd \
--enable-gd-native-ttf \
--with-ttf \
--with-freetype-dir=/usr/lib/ \
--with-jpeg-dir=/usr/lib/libjpeg.so.62 \
--enable-exif \
[#53] admin at phpru dot com [2006-02-28 09:52:02]
On my conf: php5.1.2+apache 1.33
iconv() function works very well with all cyrillic encodings, so you needn't to write your function like win2uni
[#54] --Colibri-- [2006-01-28 12:53:08]
If you have configured and compiled PHP with all the necessary command-line options and still get the error:
Fatal error: Call to undefined function imagettftext()
Try doing a "make clean" before building the php apache module:
./configure [...]
make clean
make
make install
This may solve your problem (and hopefully keep you from wasting hours trying different compile options!)
[#55] nospam at nospam dot nospam [2006-01-22 15:51:46]
I've found that upsampling your text by a factor of 8 or more can really improve the readability of generated text, especially in smaller font sizes (9 or less). I find it also helps with fonts that have kerning to reduce space between letters such as capital T and capital A (TA) where the top-right of the T will be cut off due to GD "features".
I can't tell you, the reader, exactly how to do this, as it will depend on how you are currently generating your text, but essentially what you want to try doing is upsize your font by a factor of 8 and then scale down the resulting image by the same factor.
So if you were using font size 10, use font size 80 and use imagecopyresampled() to divide the width/height down again by 8. The resulting image will be a few pixels different in width / height compared to direct text writing, so make sure to check your image sizes if you are using fixed dimensions.
Play around with other factors, 16 is a bit nicer but results in a higher CPU/RAM load when processing. Any higher is unnecessary I think. If possible you should also cache the image to a file instead of reprocessing it each request.
[#56] Mer`Zikain [2006-01-10 12:41:22]
I was looking for a way to add kerning to my text and finally just made this function to do it. Of course, if you're generating the size of the image based on the text you're putting in it, you'll have to figure out the new size to fit the new text width but I'm sure you can figure that out.
for($i=0;$i<strlen($text);$i++){
// Get single character
$value=substr($text,$i,1);
if($pval){ // check for existing previous character
list($lx,$ly,$rx,$ry) = imagettfbbox($fontsize,0,$font,$pval);
$nxpos+=$rx+3;
}else{
$nxpos=0;
}
// Add the letter to the image
imagettftext($im, $fontsize, 0, $nxpos, $ypos, $fontcolor, $font, $value);
$pval=$value; // save current character for next loop
}
[#57] a4W [2005-10-23 12:28:08]
This function will make your text bold:
<?php
function drawboldtext($image, $size, $angle, $x_cord, $y_cord, $r, $g, $b, $fontfile, $text)
{
$color = ImageColorAllocate($image, $r, $g, $b);
$_x = array(1, 0, 1, 0, -1, -1, 1, 0, -1);
$_y = array(0, -1, -1, 0, 0, -1, 1, 1, 1);
for($n=0;$n<=8;$n++)
{
ImageTTFText($image, $size, $angle, $x_cord+$_x[$n], $y_cord+$_y[$n], $color, $fontfile, $text);
}
}
?>
[#58] limalopex.eisfux.de [2005-10-03 09:17:16]
If you have problems displaying german umlauts or other chars with an ascii value > 127, try to convert the text-parameter first. The following function converts character-values > 127 (both: UTF-8 + ANSI) to HTML's numeric coded entities:
<?php
define('EMPTY_STRING', '');
function foxy_utf8_to_nce(
$utf = EMPTY_STRING
) {
if($utf == EMPTY_STRING) return($utf);
$max_count = 5; // flag-bits in $max_mark ( 1111 1000 == 5 times 1)
$max_mark = 248; // marker for a (theoretical ;-)) 5-byte-char and mask for a 4-byte-char;
$html = EMPTY_STRING;
for($str_pos = 0; $str_pos < strlen($utf); $str_pos++) {
$old_chr = $utf{$str_pos};
$old_val = ord( $utf{$str_pos} );
$new_val = 0;
$utf8_marker = 0;
// skip non-utf-8-chars
if( $old_val > 127 ) {
$mark = $max_mark;
for($byte_ctr = $max_count; $byte_ctr > 2; $byte_ctr--) {
// actual byte is utf-8-marker?
if( ( $old_val & $mark ) == ( ($mark << 1) & 255 ) ) {
$utf8_marker = $byte_ctr - 1;
break;
}
$mark = ($mark << 1) & 255;
}
}
// marker found: collect following bytes
if($utf8_marker > 1 and isset( $utf{$str_pos + 1} ) ) {
$str_off = 0;
$new_val = $old_val & (127 >> $utf8_marker);
for($byte_ctr = $utf8_marker; $byte_ctr > 1; $byte_ctr--) {
// check if following chars are UTF8 additional data blocks
// UTF8 and ord() > 127
if( (ord($utf{$str_pos + 1}) & 192) == 128 ) {
$new_val = $new_val << 6;
$str_off++;
// no need for Addition, bitwise OR is sufficient
// 63: more UTF8-bytes; 0011 1111
$new_val = $new_val | ( ord( $utf{$str_pos + $str_off} ) & 63 );
}
// no UTF8, but ord() > 127
// nevertheless convert first char to NCE
else {
$new_val = $old_val;
}
}
// build NCE-Code
$html .= '&#'.$new_val.';';
// Skip additional UTF-8-Bytes
$str_pos = $str_pos + $str_off;
}
else {
$html .= chr($old_val);
$new_val = $old_val;
}
}
return($html);
}
?>
[#59] alexey at NOSPAMPLS dot ozerov dot de [2005-08-31 00:30:23]
Notice that the path to the TrueType font has to be included in open_basedir list if open_basedir restriction is activated in php.ini.
[#60] gav-alex at bk dot ru [2005-08-10 09:05:41]
Hi all!
When my hoster updated his php's libs at first minutes i've got the same problem as some of you.
Php couldn't find the path to true type fonts.
The solution in my case was to make the path look like this
<?php
imagettftext($im, 20, 0, 620, 260, $secondary_color, "./tahoma.ttf" , "NEWS");
?>
so as you can see i simply added "./"
another tip that i wanted to add here is how to write in RUssian on image using imagettftext
you simply have to change the function argument like this
<?php
imagettftext($im, 15, 0, 575, 300, $secondary_color, "./tahoma.ttf" , win2uni("some word in russian"));
?>
where win2uni is the function that converts win1251 to unicode. here is the code of it
<?php
// Windows 1251 -> Unicode
function win2uni($s)
{
$s = convert_cyr_string($s,'w','i'); // win1251 -> iso8859-5
// iso8859-5 -> unicode:
for ($result='', $i=0; $i<strlen($s); $i++) {
$charcode = ord($s[$i]);
$result .= ($charcode>175)?"&#".(1040+($charcode-176)).";":$s[$i];
}
return $result;
}
?>
That's all today! Thanks for your attention!
Alex
[#61] BuddyHacker [2005-07-21 02:55:56]
A correction to Paul Reinheimer's note above regarding this PHP error:
Fatal error: Call to undefined function imagettftext().
Paul states that you need XPM libraries to resolve this issue. This is not true. There is an error message that originates from "configure" which mistakenly shows itself when other components are missing. For instance, if you tell "configure" to add JPEG support, and it can't find the libraries, it will tell you it can't find the JPEG libraries AND it will recommend adding --with-xpm to solve the problem. This recommendation is ill-placed and misleading.
I received the same error message above, along with the recommendation to add XPM supprt. However I resolved it by adding the --with-freetype-dir AND --enable-gd-native-ttf options to the "configure" command line. I did _not_ need XPM.
There are other variations to this error message, such as the script recommending adding JPEG support or PNG support to resolve it's own inability to locate other libraries. The script needs some cleanup in order to fix these poorly placed recommendations.
FYI, imagettftext() is a call to one of the truetype fonts functions. It is NOT related in any way to the XPM libraries, so it is not required unless you explicitly want XPM functionality.
[#62] nick [2005-04-01 01:18:30]
A trivial function to get right or centre aligned horizontal text:
function imagettftextalign($image, $size, $angle, $x, $y, $color, $font, $text, $alignment='L') {
//check width of the text
$bbox = imagettfbbox ($size, $angle, $font, $text);
$textWidth = $bbox[2] - $bbox[0];
switch ($alignment) {
case "R":
$x -= $textWidth;
break;
case "C":
$x -= $textWidth / 2;
break;
}
//write text
imagettftext ($image, $size, $angle, $x, $y, $color, $font, $text);
}
[#63] erik[at]phpcastle.com [2005-03-04 04:46:45]
Remember!!!
When uploading a font to your website you have to set the transfer mode to binary. It took me some time to find out :P. Tried to download the font from my website and it was spoiled.
In your script, the path to your font, use realpath("arial.ttf") so there is no confusion about that.
[#64] pillepop2003 at nospam dot yahoo dot de [2005-01-12 05:14:22]
Hey guys,
check this function if you want to rotate the text around its center and not its "lower left" pivot-point:
<?php
// Put center-rotated ttf-text into image
// Same signature as imagettftext();
function imagettftext_cr(&$im, $size, $angle, $x, $y, $color, $fontfile, $text)
{
// retrieve boundingbox
$bbox = imagettfbbox($size, $angle, $fontfile, $text);
// calculate deviation
$dx = ($bbox[2]-$bbox[0])/2.0 - ($bbox[2]-$bbox[4])/2.0; // deviation left-right
$dy = ($bbox[3]-$bbox[1])/2.0 + ($bbox[7]-$bbox[1])/2.0; // deviation top-bottom
// new pivotpoint
$px = $x-$dx;
$py = $y-$dy;
return imagettftext($im, $size, $angle, $px, $py, $color, $fontfile, $text);
}
?>
Big up
Phil
[#65] Paul Reinheimer [2004-09-20 03:33:00]
If you compiled PHP yourself but get an error:
Fatal error: Call to undefined function imagettftext().
You need to compile PHP with more options.
--with-gd
--enable-gd-native-ttf
--with-png
--with-zlib-dir=/usr/local/lib/zlib-1.2.1
--with-ttf
--with-jpeg-dir=/usr/local/lib/jpeg-6b/
--with-freetype-dir=/usr/local/lib/freetype-2.1.9/
--with-xpm-dir=/usr/X11R6/
The next set deal with setting up GD, and the appropriate options. Just enabling GD, ttf, png & jpeg is NOT enough. You also need Freetype and XPM.
[#66] plusplus7 at hotmail dot com [2004-07-15 13:37:40]
If you are getting all rectangles instead of text, it may well mean that your ttf font is not opentype, particularly if it is an older freeware one. This requirement didn't exist in older versions so you may find that your font stops working after you upgrade. To fix this problem, try downloading the free MS Volt utility. From there, open your font file, and then click on Compile, and resave.