【www.gdgbn.com--安卓教程】

function PutCookie($key,$value,$kptime=0,$pa="/")
{
 global $cfg_cookie_encode;
 setcookie($key,$value,time()+$kptime,$pa);
 setcookie($key."__ckMd5",substr(md5($cfg_cookie_encode.$value),0,16),time()+$kptime,$pa);
}

function DropCookie($key)
{
 setcookie($key,"",time()-360000,"/");
 setcookie($key."__ckMd5","",time()-360000,"/");
}

function GetCookie($key)
{
 global $cfg_cookie_encode;
 if( !isset($_COOKIE[$key]) || !isset($_COOKIE[$key."__ckMd5"]) )
 {
  return "";
 }
 else
 {
  if($_COOKIE[$key."__ckMd5"]!=substr(md5($cfg_cookie_encode.$_COOKIE[$key]),0,16))
  {
   return "";
  }
  else
  {
   return $_COOKIE[$key];
  }
 }
}

本文来源：http://www.gdgbn.com/shoujikaifa/19709/