$referrer = $_SERVER[‘REQUEST_SCHEME’].’://’.$_SERVER[‘HTTP_HOST’].$_SERVER[‘REQUEST_URI’]; //得到当前页面地址
$urlshang = $_SERVER[‘HTTP_REFERER’]; //得到上一页面地址
$urldan = $_SERVER[‘PHP_SELF’]; //得到当前页面地址
$urlcan = $_SERVER[“HTTP_HOST”].$_SERVER[“PHP_SELF”].”?”.$_SERVER[“QUERY_STRING”]; //得到当前页面地址带参数