PHP Dapatkan URL semasa

Contoh URL: http://example.com/folder1/folder2/yourfile.php?var=blabla#12345

$_SERVER["DOCUMENT_ROOT"] === /home/user/public_html
$_SERVER["SERVER_ADDR"]   === 10.34.12.123
$_SERVER['HTTP_HOST']     === example.com (atau dengan WWW)
$_SERVER["REQUEST_URI"]   === /folder1/folder2/yourfile.php?var=blabla
__FILE__                  === /home/user/public_html/folder1/folder2/yourfile.php
basename(__FILE__)        === yourfile.php
__DIR__                   === /home/user/public_html/folder1/folder2 [sama juga: dirname(__FILE__)]
$_SERVER["QUERY_STRING"]  === var=blabla

$_SERVER["REQUEST_URI"]   === /folder1/folder2/yourfile.php?var=blabla
parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH)  === /folder1/folder2/yourfile.php 
$_SERVER["PHP_SELF"]      === /folder1/folder2/yourfile.php

//jika file "yourfile.php" tu include dalam "parentfile.php" , dan "parentfile.PHP?abc" dibuka:
$_SERVER["PHP_SELF"]       === /parentfile.php
$_SERVER["REQUEST_URI"]    === /parentfile.php?abc
$_SERVER["SCRIPT_FILENAME"]=== /home/user/public_html/parentfile.php
str_replace($_SERVER["DOCUMENT_ROOT"],'', str_replace('\\','/',__FILE__ ) )  === /folder1/folder2/yourfile.php

Jadi, nak dapatkan URL semasa secara penuh

$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

Jika rasanya URL kita terlibat dengan https, sebaiknya check sekali.

$actual_link = (isset($_SERVER['HTTPS']) ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";