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function randomkeys($length)
{
 $key='';
 $pattern='123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
 for($i=0;$i<$length;$i++)
 {
   $key .= $pattern{mt_rand(0,47)}; 
       
  }
  return $key;
 } 
 echo randomkeys(20);


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<?php
function get_ip_place(){
$ip=file_get_contents(http://fw.qq.com/ipaddress);
$ip=str_replace('"',' ',$ip);
$ip2=explode("(",$ip);
$a=substr($ip2[1],0,-2);
$b=explode(",",$a);
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<?php
/*
 * Created on 2010-3-11
 * author:zhangfei
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 */
 session_start();
 class Check_Class{
  public $h_img ;
public $c_back ;
public $c_front ;
//¹¹Ô캯Êý
function Check_Class(){
$h_img  =  imagecreate(100,30);
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  #E-mail:shenlian@hotmail.com ......
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