- php教程首页
- php图像处理
php 复杂生成验证码图片
•php图像处理•阅读 234 - function image3($length=4,$type='png',$width=180,$height=60,$font,$verifyName='verify') {
- $code = $this->rand_string($length,4);
- $width = ($length*25)>$width?$length*25:$width;
- $authCode = new Zend_Session_Namespace('Auth_Code');
- $authCode->imagecode = $randval;
- $im=imagecreatetruecolor($width,$height);
- $borderColor = imagecolorallocate($im, 100, 100, 100); //边框色
- $bkcolor=imagecolorallocate($im,250,250,250);
- imagefill($im,0,0,$bkcolor);
- @imagerectangle($im, 0, 0, $width-1, $height-1, $borderColor);
- // 干扰
- for($i=0;$i<15;$i++){//开源代码phpfensi.com
- $fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
- imagearc($im,mt_rand(-10,$width),mt_rand(-10,$height),mt_rand(30,300),mt_rand(20,200),55,44,$fontcolor);
- }
- for($i=0;$i<255;$i++){
- $fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
- imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$fontcolor);
- }
- if(!is_file($fontface)) {
- $fontface = dirname(__FILE__)."/".$fontface;
- }
- for($i=0;$i<$length;$i++){
- $fontcolor=imagecolorallocate($im,mt_rand(0,120),mt_rand(0,120),mt_rand(0,120)); //这样保证随机出来的颜色较深。
- $codex= substr($code,$i,1);
- imagettftext($im,mt_rand(16,20),mt_rand(-60,60),40*$i+20,mt_rand(30,35),$fontcolor,$fontface,$codex);
- }
- $this->output($im,$type);
- }
- function output($im,$type='png')
- {
- header("Content-type: image/".$type);
- $ImageFun='Image'.$type;
- $ImageFun($im);
- imagedestroy($im);
- }