How to get current page URL in PHP

Use the PHP $_SERVER Superglobal Variable

You can use the $_SERVER built-in variable to get the current page URL in PHP. The $_SERVER is a superglobal variable, which means it is always available in all scopes.

Also if you want full URL of the page you'll need to check the scheme name (or protocol), whether it is http or https. Let's take a look at an example to understand how it works:

<?php
$uri = $_SERVER['REQUEST_URI'];
echo $uri; // Outputs: URI
 
$protocol = ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
 
$url = $protocol . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
echo $url; // Outputs: Full URL
 
$query = $_SERVER['QUERY_STRING'];
echo $query; // Outputs: Query String
?>