Home > php教程 > php手册 > body text

PHP验证码图片生成程序

WBOY
Release: 2016-06-21 09:07:11
Original
1071 people have browsed it

程序|验证码

//小猪会气功
session_start();
session_register('code');
$width = "70";//图片宽
$height = "25";//图片高
$len = "4";//生成几位验证码
$bgcolor = "#ffffff";//背景色
$noise = true;//生成杂点
$noisenum = 200;//杂点数量
$border = false;//边框
$bordercolor = "#000000";
$image = imageCreate($width, $height);
$back = getcolor($bgcolor);
imageFilledRectangle($image, 0, 0, $width, $height, $back);
$size = $width/$len;
if($size>$height) $size=$height;
$left = ($width-$len*($size+$size/10))/$size;
for ($i=0; $i{
        $randtext = rand(0, 9);
        $code .= $randtext;
 $textColor = imageColorAllocate($image, rand(0, 100), rand(0, 100), rand(0, 100));
 $font = rand(1,4).".ttf";
 $randsize = rand($size-$size/10, $size+$size/10);
 $location = $left+($i*$size+$size/10);
 imagettftext($image, $randsize, rand(-18,18), $location, rand($size-$size/10, $size+$size/10), $textColor, $font, $randtext);
}
if($noise == true) setnoise();
$_SESSION['code'] = $code;
$bordercolor = getcolor($bordercolor);
if($border==true) imageRectangle($image, 0, 0, $width-1, $height-1, $bordercolor);
header("Content-type: image/png");
imagePng($image);
imagedestroy($image);
function getcolor($color)
{
     global $image;
     $color = eregi_replace ("^#","",$color);
     $r = $color[0].$color[1];
     $r = hexdec ($r);
     $b = $color[2].$color[3];
     $b = hexdec ($b);
     $g = $color[4].$color[5];
     $g = hexdec ($g);
     $color = imagecolorallocate ($image, $r, $b, $g);
     return $color;
}
function setnoise()
{
 global $image, $width, $height, $back, $noisenum;
 for ($i=0; $i  $randColor = imageColorAllocate($image, rand(0, 255), rand(0, 255), rand(0, 255)); 
  imageSetPixel($image, rand(0, $width), rand(0, $height), $randColor);
 }
}
?>



Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template