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<?php
/*
* Created on 2010-3-11
* author:zhangfei
*ÎÒµÄÑéÖ¤ÂëÀà
*/
session_start();
class Check_Class{
public $h_img ;
public $c_back ;
public $c_front ;
//¹¹Ô캯Êý
function Check_Class(){
$h_img = imagecreate(100,30);
$c_back = imagecolorallocate($h_img,0,0,0);
$c_front = imagecolorallocate($h_img,255,255,255);
$_SESSION[randstr]=$randm_string = $this->random(5);//ÓÃsession±£´æÆðÀ´ÓÃÒÔºóÃæÅжÏ
$this->getLine($h_img);
$this->getPoint($h_img);
$this->paintString($h_img,$randm_string,$c_front);
//ÏÔʾͼƬ
header("Content-type: image/jpeg");
imagejpeg($h_img);
imagedestroy($h_img);
}
//²úÉúËæ»ú×Ö·û´®£¬°üÀ¨Êý×ֺʹóСд×Öĸ
function random($length)
{
$hash = "";
$chars = "CEFGHIJKLMNOPQRSTUVWXYZ0123456789cefghijklmnopqrstuvwxyz";
$max = strlen($chars) - 1;
mt_srand((double)microtime() * 1000000);
for($i = 0; $i < $length; $i++)
{
$hash .= $chars[mt_rand(0, $max)];
}
return $hash;
}
//»¸ÉÈÅÏߵĺ¯Êý
function getLine($h){
for($j=0;$j<5;$j++){
//¶¨ÒåÏßÌõ
$c_line = imagecolorallocate($h,rand(0,255),rand(0,255),rand(0,255));
//ÔÚͼƬÉÏ»®Ïß
imageline($h,rand(0,100),rand(0,30),rand(0,100),rand(0,30),$c_line);
}
}
//»Ôëµã
function getPoint($h){
for($ii=0;$ii<400;$ii++){
$c_point = imagecolorallocate($h,rand(0,255),rand(0,255),rand(0,255));//¶¨ÒåÔëµãÑÕÉ«
imagesetpixel($h,rand()%100,rand()%30,$c_point);
}
}
//»×Ö·û´®
function paintString($h,$rd_str,$c_f){
imagestring($h,rand(4,6),rand(1,50),rand(1,15),$rd_str,$c_f);
}
}
$chek = new Check_Class();
?>
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