php获取当前页面的url地址

<?php

// 说明：获取完整URL


function curPageURL() 

{

    $pageURL = 'http';


    if ($_SERVER["HTTPS"] == "on") 

    {

        $pageURL .= "s";

    }

    $pageURL .= "://";


    if ($_SERVER["SERVER_PORT"] != "80") 

    {

        $pageURL .= $_SERVER["SERVER_NAME"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"];

    } 

    else 

    {

        $pageURL .= $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"];

    }

    return $pageURL;

}

?>