PHP folder traversal, image compression at equal proportions-PHP Tutorial-php.cn

/**
* Source: Internet
*/
class image
{
var $w_pct = 100; //Transparency
var $w_quality = 100; //Quality
var $w_minwidth = 500; / /Minimum width
var $w_minheight = 500; //Minimum height
var $interlace = 0; //Whether the image is interlaced
var $fontfile; //Font file
var $w_img; //Default watermark image
function __construct()
{
$this->fontfile = $_SERVER['DOCUMENT_ROOT'].'/public/fonts/simhei.ttf';
$this->w_img = '';
}
function image( )
{
$this->__construct();
}
function info($img)
{
$imageinfo = getimagesize($img); //Return image information array 0=>Width pixels 1= >High pixel 2=> is the image type mark 3 => is a text string, the content is "height="yyy" width="xxx"",
if($imageinfo === false) return false ;
$imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //Get the image file type $imageinfo[2] is the mark of the image type
$imagesize = filesize($img); // Image size
$info = array(
'width'=>$imageinfo[0],
'height'=>$imageinfo[1],
'type'=>$imagetype,
'size'=> ;$imagesize,
'mime'=>$imageinfo['mime']
);
return $info;
}
/**
* 缩略图
*
* @param string $image
* @param string $filename
* @param int $maxwidth
* @param int $maxheight
* @param string $suffix
* @param int $autocut
* @return string
*/
function thumb($image, $filename = '' ,$maxwidth = 50, $maxheight = 50, $suffix='_thumb', $autocut = 0)
{
if( !$this->check($image)) return false;
$info = $this- >info($image); //Get image information
if($info === false) return false;
$srcwidth = $info['width']; //Source image width
$srcheight = $info[ 'height']; //The source image is high
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //Get the extension
if(!$type) $type = $info[ 'type']; //If not obtained, use $info['type']
$type = strtolower($type);
unset($info);
$scale = min($maxwidth/$srcwidth, $ maxheight/$srcheight); //Get the thumbnail ratio
//Get the ratio according to the source image
$createwidth = $width = (int) ($srcwidth*$scale); //Get the thumbnail width();
$createheight = $height = (int)($srcheight*$scale);//(); //Get the thumbnail height
$psrc_x = $psrc_y = 0;
if($autocut) //According to the proportion of the thumbnail To get
{
if($maxwidth/$maxheight<$srcwidth/$srcheight && $maxheight>=$height) //If the thumbnail is proportionally narrower than the source image
{
$width = $maxheight/$height *$width; //The width is processed according to the corresponding proportion
$height = $maxheight;// //The height remains unchanged
}
elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width) //If the thumbnail is proportionally wider than the source image
{
$height = $maxwidth/$width*$height;//
$width = $maxwidth;
}
if($maxwidth == '55') {
$width = '55';
$createwidth = '55';
}
if($maxwidth == '110'){
$width = '110';
$createwidth = '110';
}
}
if($srcwidth<='280' && $maxwidth != '110'){
$createwidth= $srcwidth;
$createheight = $srcheight;
}
$createfun = 'imagecreatefrom'.($type= ='jpg' ? 'jpeg' : $type); //Find different image processing functions
$srcimg = $createfun($image); //Return the image identifier
if($type != 'gif' && function_exists ('imagecreatetruecolor')){
$thumbimg = imagecreatetruecolor($createwidth, $createheight); //Create a new true color image
}else{
if($maxwidth == '110' && $srcheight >= $srcwidth){
$height1 = 72;
$thumbimg = imagecreate($width, $height1); //Create a new palette-based Image
}elseif ($maxwidth == '110' && $srcheight <= $srcwidth){
$width1 = 110;
$thumbimg = imagecreate($width1, $height); //Create a new palette-based Image
}else{
$thumbimg = imagecreate($width, $height); //Create a new palette-based image
}
}
if(function_exists('imagecopyresampled')){ //Resample and copy part of the image And adjust the size, true color
//imagecopyresampled(new image, source image, x distance from the upper left corner of the new image, y distance from the upper left corner of the new image, x distance from the upper left corner of the source image, y distance from the upper left corner of the source image, width of the new image, new Image height, source image width, source image height)
if($maxwidth == '110' && $srcheight >= $srcwidth){
$psrc_x = 0;
$psrc_yz = $height/2;
$psrc_y = $psrc_yz;
$width = '110';
}
if($maxwidth == '110' && $srcheight >= $srcwidth && $srcheight>= '72' && $srcwidth <= '110'){
$psrc_x = 0;
$psrc_yz = $height/2;
$psrc_y = $psrc_yz;
$width = '110';
}
if($maxheight == '72' && $srcheight <= $srcwidth && $srcheight<= '72' && $srcwidth >= '110'){
$cha = ($maxheight-$srcheight)/2;
$psrc_y = -($cha);
$width = $srcwidth;
$height = '72';
$srcheight = '72';
}
imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);
}else{ //Copy part of the image and resize, palette
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate assigns a color to an image
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); / / Fill the background color of the image based on the palette, assign a green
// imagecolortransparent Define a color as a transparent color
imagecolortransparent($thumbimg, $background_color); // Set to a transparent color, if this line is commented out Output a green image
}
// imageinterlace activates or disables interlacing
if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);
$ imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);
//imagejpeg imagegif imagepng
if(empty($filename)) $filename = substr($image, 0, strrpos( $image, '.')).$suffix.'.'.$type; //Get the file name
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //New image
imagedestroy ($thumbimg); //Destroy the thumbnail
imagedestroy($srcimg); //Destroy the source image
return $filename;
}
/**
* Limit width or height
*
* @param string $image
* @param int $maxwidth
* @param int $maxheight
* @param string $suffix
* @return string
*/
function thumb3($image,$maxwidth = 0, $maxheight = 0, $suffix='_thumb')
{
if( !$this->check($image)) return false;
$info = $this->info($image); //Get Image information
if($info === false) return false;
$srcwidth = $info['width']; //Source image width
$srcheight = $info['height']; //Source image height
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //Get the extension
if(!$type) $type = $info['type']; //If not obtained , use $info['type']
$type = strtolower($type);
unset($info);
if($maxwidth==0){
$scale = $maxheight/$srcheight;
if($ scale<1){
$createwidth = $srcwidth*$scale;
$createheight = $maxheight;
}else{
$createwidth = $srcwidth;
$createheight = $srcheight;
}
}
if($maxheight==0){
$scale = $maxwidth/$srcwidth;
if($scale<1){
$createwidth = $maxwidth;
$createheight = $srcheight*$scale;
} else{
$createwidth = $srcwidth;
$createheight = $srcheight;
}
}
$psrc_x = $psrc_y = 0;
$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //Find different image processing functions
$srcimg = $createfun($image); //Return the image identifier
if($type != 'gif' && function_exists('imagecreatetruecolor')){
$ thumbimg = imagecreatetruecolor($createwidth, $createheight); //Create a new true color image
}else{
$thumbimg = imagecreate($createwidth, $createheight); //Create a new palette-based image
}
if( function_exists('imagecopyresampled')){ //Resample copy part of the image and resize, true color
//imagecopyresampled(new image, source image, x distance from the upper left corner of the new image, y distance from the upper left corner of the new image, upper left corner of the source image x distance, y distance from the upper left corner of the source image, new image width, new image height, source image width, source image height)
imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight , $srcwidth, $srcheight);
}else{ //Copy part of the image and resize, palette
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate assigns a color to an image
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); // Fill the background color of the palette-based image, assign a green
// imagecolortransparent defines a color as transparent
imagecolortransparent($thumbimg, $background_color); // Set to transparent Color, if this line is commented out, a green image will be output
}
// imageinterlace activates or disables interlacing
if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this ->interlace);
$imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);
//imagejpeg imagegif imagepng
$filename = substr($image, 0, strrpos( $image, '.')).$suffix.'.'.$type; //Get the file name
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //New image
imagedestroy ($thumbimg); //Destroy the thumbnail
imagedestroy($srcimg); //Destroy the source image
return $filename;
}
/**
* Generate thumbnails of specific sizes to solve the problem that the original thumbnails cannot meet the specific size. PS: The parts of the image that do not meet the thumbnail ratio will be cropped.
* @static
* @access public
* @param string $image Original image
* @param string $type image format
* @param string $thumbname thumbnail file name
* @param string $maxWidth width
* @param string $maxHeight height
* @param boolean $interlace enable interlacing
* @return void
*/
static function thumb2($image, $thumbname, $ type='', $maxWidth=200, $maxHeight=50, $interlace=true) {
// Get original image information
$info = Image::getImageInfo($image);
if ($info !== false ) {
$srcWidth = $info['width'];
$srcHeight = $info['height'];
$type = empty($type) ? $info['type'] : $type;
$type = strtolower($type);
$interlace = $interlace ? 1 : 0;
unset($info);
$scale = max($maxWidth / $srcWidth, $maxHeight / $srcHeight); // Calculate the scaling ratio
//Judge the ratio between the original image and the thumbnail. For example, if the original image is wider than the thumbnail, crop both sides and vice versa..
if($maxWidth / $srcWidth > $maxHeight / $srcHeight){
//Higher than
$srcX = 0 ;
$srcY = ($srcHeight - $maxHeight / $scale) / 2 ;
$cutWidth = $srcWidth;
$cutHeight = $maxHeight / $scale;
}else{
//Wider than
$srcX = ($ srcWidth - $maxWidth / $scale) / 2;
$srcY = 0;
$cutWidth = $maxWidth / $scale;
$cutHeight = $srcHeight;
}
// 载入原图
$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
$srcImg = $createFun($image);
//创建缩略图
if ($type != 'gif' && function_exists('imagecreatetruecolor'))
$thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
else
$thumbImg = imagecreate($maxWidth, $maxHeight);
// 复制图片
if (function_exists("ImageCopyResampled"))
imagecopyresampled($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
else
imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
if ('gif' == $type || 'png' == $type) {
//imagealphablending($thumbImg, false);//取消默认的混色模式
//imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息
$background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一个绿色
imagecolortransparent($thumbImg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图
}
// 对jpeg图形设置隔行扫描
if ('jpg' == $type || 'jpeg' == $type)
imageinterlace($thumbImg, $interlace);
// 生成图片
$imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
@chmod(dirname($thumbname),0777);
$imageFun($thumbImg, $thumbname);
imagedestroy($thumbImg);
imagedestroy($srcImg);
return $thumbname;
}
return false;
}
/**
* Get image information
* @static
* @access public
* @param string $image image file name
* @return mixed
*/
static function getImageInfo($img) {
$imageInfo = getimagesize($img);
if ($imageInfo !== false) {
$imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1));
$imageSize = filesize($img);
$info = array(
"width" => $imageInfo[0],
"height" => $imageInfo[1],
"type" => $imageType,
"size" => $imageSize,
"mime" => $imageInfo['mime']
);
return $info;
} else {
return false;
}
}
//watermark(源图,生成文件,生成位置,水印文件,水印文本,背景色)
function watermark($source, $target = '', $w_pos = 9, $w_img = '', $w_text = '', $w_font = 12, $w_color = '#cccccc',$x='',$y='')
{
if( !$this->check($source)) return false;
if(!$target) $target = $source;
if ($w_img == '' && $w_text == '')
$w_img = $this->w_img;
$source_info = getimagesize($source);
$source_w = $source_info[0]; //获取宽
$source_h = $source_info[1]; //获取高
if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false; //宽和高达不到要求直接返回
switch($source_info[2]) //新建图片
{
case 1 :
$source_img = imagecreatefromgif($source);
break;
case 2 :
$source_img = imagecreatefromjpeg($source);
break;
case 3 :
$source_img = imagecreatefrompng($source);
break;
default :
return false;
}
if(!empty($w_img) && file_exists($w_img)) //水印文件
{
$ifwaterimage = 1; //是否水印图
$water_info = getimagesize($w_img); //水印信息
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2])
{
case 1 :
$water_img = imagecreatefromgif($w_img);
break;
case 2 :
$water_img = imagecreatefromjpeg($w_img);
break;
case 3 :
$water_img = imagecreatefrompng($w_img);
break;
default :
return;
}
}
else
{
$ifwaterimage = 0;
//imagettfbbox 本函数计算并返回一个包围着 TrueType 文本范围的虚拟方框的像素大小。
//imagettfbbox (font size, font angle, font file, file)
// echo $this->fontfile;
$temp = imagettfbbox(ceil($w_font*1.6), 0, $this->fontfile, $w_text);//Get the range of text using truetype font
$width = $temp[4] - $temp[6]; //The X position of the upper right corner - the X position of the upper left corner
$height = $temp[3] - $temp[5]; //Lower right corner Y position - Upper right corner Y position
unset($temp);
}
switch($w_pos)
{
case 0: //Random position
$wx = rand(0 ,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
case 1: //Upper left corner
$wx = 25;
$wy = 25;
break;
case 2: //The upper middle position
$wx = ($source_w - $width) / 2;
$wy = 0;
break;
case 3: //The upper right corner
$wx = $source_w - $width;
$wy = 0;
break;
case 4: //Middle position on the left
$wx = 0;
$wy = ($source_h - $height) / 2;
break;
case 5: // Middle position
$wx = ($source_w - $width) / 2;
$wy = ($source_h - $height) / 2;
break;
case 6: // Bottom middle position
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height;
break;
case 7: //Lower left corner
$wx = 0;
$wy = $source_h - $height;
break;
case 8: //Middle position on the right
$wx = $source_w - $width;
$wy = ($source_h - $height) /2;
break;
case 9: //Lower right corner
$wx = $source_w - $width;
$wy = $source_h - $height ;
break;
default: //random
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height ));
break;
case 10://Customized position
$wx = $x;
$wy = $y;
case 11: //Bottom middle position--for craftsmen only
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height-50;
break;
break;
}
if($ifwaterimage) //If there is a watermark image
{
//imagecopymerge copy and merge images Part of
//Parameters (source image, watermark image, copy to source image x position, copy to source image y position, from watermark image x position, from watermark image y position, height, width, transparency)
//imagecopymerge( $source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);
imagecopy($source_img,$water_img,$wx,$wy,0,0, $width,$height);
}
else
{
if(!empty($w_color) && (strlen($w_color)==7))
{
$r = hexdec(substr($w_color,1,2 )); //Get red
$g = hexdec(substr($w_color,3,2)); //Get green
$b = hexdec(substr($w_color,5)); //Get blue
}
else
{
return;
}
//imagecolorallocate fills the background color with an image based on the palette
//imagestring draws a line of string horizontally
//imagestring(source image, font size, position X, position Y, text , color)
//Parameters ($image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text)
imagettftext($source_img,$w_font,0, $wx,$wy,imagecolorallocate($source_img,$r,$g,$b),$this->fontfile,$w_text);
//imagestring($source_img,$w_font,$wx,$wy,$ w_text,imagecolorallocate($source_img,$r,$g,$b));
}
//Output to a file or browser
switch($source_info[2])
{
case 1 :
imagegif($source_img, $target); //Output the image to a browser or file in GIF format
break ;
case 2 :
imagejpeg($source_img, $target, $this->w_quality); //Output the image to the browser or file in JPEG format
break;
case 3 :
imagepng($source_img, $target ; if(isset($water_img))
{
imagedestroy($water_img); //Destroy
}
unset($source_info);
imagedestroy($source_img);
return true;
}
//gd library must exist, The suffix is jpg|jpeg|gif|png, the file exists, imagecreatefromjpeg or imagecreatefromgif exists
function check($image)
{
return extension_loaded('gd') &&
preg_match("/.(JPG|JPEG|PNG|GIF| jpg|jpeg|gif|png)/i", $image, $m) &&
file_exists($image) &&
function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $ m[1]));
//imagecreatefromjpeg
//imagecreatefromgif
//imagecreatefrompng
}
}
/**
Thumbnail
1. Create a new image resource through imagecreatefromgif imagecreatefromjpeg imagecreatefrompng
2.imagecopyresampled Copy the image and resize it
Watermark: image watermark, text watermark
1. Create image
2. Add watermark
Image watermark: imagecopymerge Put 2 Merge images together
Text watermark: imagettftext Write text to images
*/
error_reporting(0);
$hostdir = dirname(__FILE__);
$ filesnames = scandir($hostdir.'/desktop');
$img = new image();
foreach($filesnames as $name){
if($name != '.' && $name != '.. '){
$imgPath = $hostdir.'/desktop/';
$imgsize = getimagesize($imgPath.$name);
$imgInfo = explode('.',$name);
$imginfo2 = explode(' _',$imgInfo[0]);
if($imginfo2[count($imginfo2)-1] != 'small'){
$img_small = $imgPath.$imgInfo[0].'_small.'.$ imgInfo[1];
$img->thumb2($imgPath.$name,$img_small,'',$imgsize[0]/4,$imgsize[1]/4);
}
}
}
Copy code

Equal proportions, PHP