工会web

GonghuiWeb/www/js/index.php

@@ -0,0 +1,39 @@
+<?php
+class CCheckCodeFile{
+	private $mCheckCodeNum = 4;//验证码位数
+	private $mCheckCode = '0123456789';//产生的验证码
+	private $mCheckImageWidth = '65';//验证码的图片宽度
+	private $mCheckImageHeight = '20';//验证码的图片宽度
+	//输出验证码图片
+	public function OutCheckImage(){
+		header("Content-type:image/png");//输出图象头信息
+		$im = imagecreate($this->mCheckImageWidth,$this->mCheckImageHeight);//建立图象
+		$black = imagecolorallocate($im,255,255,255);//建立黑色标志符
+		$white = imagecolorallocate($im,0,0,0);//建立白色标志符
+		$gray = imagecolorallocate($im,100,100,100);//建立灰色标志符
+		imagefill($im,80,30,$black);//填充图象
+		for($i=0;$i<50;$i++){
+			$randcolor=imagecolorallocate($im,rand(100,255),rand(100,255),rand(100,255));//建立一个随机图象颜色标志符
+			imagesetpixel($im, rand(0,$this->mCheckImageWidth),rand(0,$this->mCheckImageHeight),$randcolor);//用上一行建立的标志符描点，点的坐标为随机
+		}
+//		for($i=0;$i<5;$i++){
+//			imageline($im,rand(0,$this->mCheckImageWidth),rand(0,$this->mCheckImageHeight),rand(0,$this->mCheckImageWidth),rand(0,$this->mCheckImageHeight),$gray);//以随机坐标画线
+//		}
+		for($i=0;$i<=$this->mCheckCodeNum;$i++){
+			$authnum.=substr($this->mCheckCode,rand(0,9),1);//建立验证字符串
+		}
+		$_SESSION['num']=strtolower($authnum);//把字符串写入SESSION以待验证
+		$x=rand(2,20);
+		$y=rand(2,6);
+		imagestring($im,5,$x,$y,$authnum,$white);//把字符串写入图片
+		imagepng($im);//输出图片
+		imagedestroy($im);//注销图片资源
+	}
+}
+session_start();
+if($_SESSION['num']){
+unset($_SESSION['num']);//注销上一次的图片验证码
+}
+$code_image = new CCheckCodeFile;
+$code_image ->OutCheckImage();
+?>