信呼OA版本v2.3.8

include/chajian/imgcodeChajian.php

@@ -0,0 +1,47 @@
+<?php 
+/**
+*	图片验证码
+*/
+class imgcodeChajian extends Chajian{
+	
+	public function check($key,$val)
+	{
+		if(isempt($val))return false;
+		$code 	= 'abc'.$val.'';
+		$geval  = c('cache')->get('code'.$key.'');
+		if(md5($code)!=$geval)return false;
+		c('cache')->del('code'.$key.'');
+		return true;
+	}
+	
+	public function show($key)
+	{
+		header("Content-type:image/gif");
+		$a		= rand(0,9);
+		$b		= rand(0,9);
+		$h  	= 30;
+		$code 	= 'abc'.($a+$b).'';
+		$w 		= 70;
+		$im		= imagecreatetruecolor($w,$h);
+		c('cache')->set('code'.$key.'', md5($code), 5*60);
+		$bg		= imagecolorallocate($im,255,255,255);
+		imagefill($im,0,0,$bg);	//添加背景颜色
+
+		$black	= imagecolorallocate($im,0,0,0);
+
+		for($i=0;$i<2;$i++){//画线条
+			$at1=imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));
+			imageline($im,0,rand(0,$h),$w,rand(0,$h),$at1);
+		}
+
+		for($i=0;$i<200;$i++){//画点
+			$at1=imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));
+			imagesetpixel($im,rand(0,$w),rand(0,$h),$at1);
+		}
+
+		imagestring($im,5,rand(0,30),rand(0,$h-15),''.$a.'+'.$b.'=?',$black);
+		
+		imagegif($im);
+		imagedestroy($im);
+	}
+}