php gets the complete url of the current page

This article introduces a piece of code that uses PHP to obtain the complete URL of the current page. It is very simple and practical. Friends in need can refer to it.

In php, the super global variable $_SERVER contains all information. Through $_SERVER, we can get almost all kinds of information about the URL we want. In this article, we use the super global variable $_SERVER to construct the complete URL of the current page.

Example 1, code:

<?php
/**
 *
 * @取得当前页面的完整url地址
 * @return string
 * @by bbs.it-home.org
 *
 */
 function getAddress()
 {
    /*** check for https ***/
    $protocol = $_SERVER['HTTPS'] == 'on' ? 'https' : 'http';
    /*** return the full address ***/
    return $protocol.'://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
 }

 /*** example usage ***/
 echo getAddress();
?>

Example 2, get the url of the current page.

<?php
#测试网址: http://localhost/blog/testurl.php?id=5

//获取域名或主机地址 
echo $_SERVER['HTTP_HOST']."<br>"; #localhost

//获取网页地址 
echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php

//获取网址参数 
echo $_SERVER["QUERY_STRING"]."<br>"; #id=5

//获取用户代理 
echo $_SERVER['HTTP_REFERER']."<br>"; 

//获取完整的url
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];
#http://localhost/blog/testurl.php?id=5

//包含端口号的完整url
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]; 
#http://localhost:80/blog/testurl.php?id=5

//只取路径
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; 
echo dirname($url);
#http://localhost/blog
?>

Example 3, get the complete url of the current page.

<?php
/**
 * 获取当前页面完整URL地址
 */
function get_url() {
 $sys_protocal = isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://';
 $php_self = $_SERVER['PHP_SELF'] ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME'];
 $path_info = isset($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : '';
 $relate_url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : $php_self.(isset($_SERVER['QUERY_STRING']) ?
 '?'.$_SERVER['QUERY_STRING'] : $path_info);
 return $sys_protocal.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '').$relate_url;
}

echo get_url();
?>