<?php  
/** 
 * 获取当前页面的完整 url 
 * @author ruxing.li 
 * @return string 
 */  
function getPageUrl(){  
    $url = (isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443') ? 'https://' : 'http://';  
    $url .= $_SERVER['HTTP_HOST'];  
    $url .= isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : urlencode($_SERVER['PHP_SELF']) . '?' . urlencode($_SERVER['QUERY_STRING']);  
    return $url;  
}  
echo getPageUrl();