PHP获取当前浏览器访问的链接

cur_url.php

<?php

/**
 * 获取当前浏览器访问的链接
 * @return String
 */
function cur_url() {
    if (isset($_SERVER['SERVER_PROTOCOL'])) {
        $sch = strpos($_SERVER['SERVER_PROTOCOL'], 'https') !== false ? 'https://' : 'http://';
    } 
    else {
        $sch = 'http://';
    }
    
    if (strpos($_SERVER['HTTP_HOST'], ":") !== false) list($host, $port) = explode(":", $_SERVER['HTTP_HOST']);
    else $host = $_SERVER['HTTP_HOST'];
    $path = $_SERVER['REQUEST_URI'];
    $url = $sch . $host . (isset($port) && !empty($port) ? ':' . $port : '') . $path;
    return $url;
}