Posted in PHP onApril 09, 2010
下面是效果图,这个效果图是没有开启干扰码的效果图
下面是类代码
<?php /************************************************ //FILE:ImageCode //DONE:生成动态验证码类 //DATE"2010-3-31 //Author:www.5dkx.com 5D开心博客 ************************************************************************/ class ImageCode{ private $width; //验证码图片宽度 private $height; //验证码图片高度 private $codeNum; //验证码字符个数 private $checkCode; //验证码字符 private $image; //验证码画布 /************************************************************************ // Function:构造函数 // Done:成员属性初始化 // Author:www.5dkx.com 5D开心博客 ************************************************************************/ function __construct($width=60,$height=20,$codeNum=4) { $this->width = $width; $this->height = $height; $this->codeNum = $codeNum; $this->checkCode = $this->createCheckCode(); } function showImage() { $this->getcreateImage(); $this->outputText(); $this->setDisturbColor(); $this->outputImage(); } function getCheckCode() { return $this->chekCode; } private function getCreateImage() { $this->image = imagecreatetruecolor($this->width,$this->height); $back = imagecolorallocate($this->image,255,255,255); $border = imagecolorallocate($this->image,255,255,255); imagefilledrectangle($this->image,0,0,$this->width-1,$this->height-1,$border); //使用纯白色填充矩形框,这里用的话后面干扰码失效 /*如果想用干扰码的话使用下面的*/ //imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$border); } private function createCheckCode() { for($i=0;$i<$this->codeNum;$i++) { $number = rand(0,2); switch($number) { case 0: $rand_number = rand(48,57); break;//数字 case 1: $rand_number = rand(65,90);break;//大写字母 case 2: $rand_number = rand(97,122);break;//小写字母 } $asc = sprintf("%c",$rand_number); $asc_number = $asc_number.$asc; } return $asc_number; } private function setDisturbColor()//干扰吗设置 { for($i=0;$i<=100;$i++) { //$color = imagecolorallocate($this->image,rand(0,255),rand(0,255),rand(0,255)); $color = imagecolorallocate($this->image,255,255,255); imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color); } //$color = imagecolorallocate($this->image,0,0,0); //imagesetpixel($this->image,rand(1,$this->width-2),rand(1,$this->height-2),$color); } private function outputText() { //随机颜色、随机摆放、随机字符串向图像输出 for($i=0;$i<=$this->codeNum;$i++) { $bg_color = imagecolorallocate($this->image,rand(0,255),rand(0,128),rand(0,255)); $x = floor($this->width/$this->codeNum)*$i+3; $y = rand(0,$this->height-15); imagechar($this->image,5,$x,$y,$this->checkCode[$i],$bg_color); } } private function outputImage() { if(imagetypes()&IMG_GIF) { header("Content_type:image/gif"); imagegif($this->image); } elseif(imagetypes()&IMG_JPG) { header("Content-type:image/jpeg"); imagejpeg($this->image,"",0.5); } elseif(imagetypes()&IMG_PNG) { header("Content-type:image/png"); imagejpeg($this->image); } elseif(imagetypes()&IMG_WBMP) { header("Content-type:image/vnd.wap.wbmp"); imagejpeg($this->image); } else { die("PHP不支持图像创建"); } } function __destruct() { imagedestroy($this->image); } } /*显示*/ /******************************************************************* session_start(); $image = new ImageCode(60,20,4); $image->showImage(); $_SESSION['ImageCode'] = $image->getCheckCode(); *******************************************************************/ ?>
PHP 动态随机生成验证码类代码
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