get current page url in php

1<?php
2$uri = $_SERVER['REQUEST_URI'];
3echo $uri; // Outputs: URI 
4
5$protocol = ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://"; 
6$url = $protocol . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
7echo $url; // Outputs: Full URL 
8
9$query = $_SERVER['QUERY_STRING'];
10echo $query; // Outputs: Query String
11?>

1<?php  
2    if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on')   
3         $url = "https://";   
4    else  
5         $url = "http://";   
6    // Append the host(domain name, ip) to the URL.   
7    $url.= $_SERVER['HTTP_HOST'];   
8    
9    // Append the requested resource location to the URL   
10    $url.= $_SERVER['REQUEST_URI'];    
11      
12    echo $url;  
13  ?> 

1<?php  
2    if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on')   
3         $url = "https://";   
4    else  
5         $url = "http://";   
6    // Append the host(domain name, ip) to the URL.   
7    $url.= $_SERVER['HTTP_HOST'];   
8    
9    // Append the requested resource location to the URL   
10    $url.= $_SERVER['REQUEST_URI'];    
11      
12    echo $url;  
13  ?>   

1$protocol = strpos(strtolower($_SERVER['SERVER_PROTOCOL']),'https') === FALSE ? 'http' : 'https';
2$host     = $_SERVER['HTTP_HOST'];
3$script   = $_SERVER['SCRIPT_NAME'];
4$params   = $_SERVER['QUERY_STRING'];
5 
6$currentUrl = $protocol . '://' . $host . $script . '?' . $params;
7 
8echo $currentUrl;