comparing two strings and return matched string

Question

I am trying to get matched parts by comparing

$_SERVER['DOCUMENT_ROOT'] and $_SERVER['PHP_SELF'];

Like if $_SERVER['DOCUMENT_ROOT'] returned: var/www/subdir

and $_SERVER['PHP_SELF']; returned /subdir/index.php/somepage

so how do i match $_SERVER['DOCUMENT_ROOT'] from right

and $_SERVER['PHP_SELF']; from left and then get the matched part

So that I will get this in output: subdir

Thanks for help

>I am trying get base url of a application by comparing $_SERVER['DOCUMENT_ROOT'] and $_SERVER['PHP_SELF']; Like if $_SERVER['DOCUMENT_ROOT'] returned: var/www/subdir and $_SERVER['PHP_SELF']; returned /subdir/index.php/somepage so how do i match $_SERVER['DOCUMENT_ROOT'] from right and $_SERVER['PHP_SELF']; from left and return matched. please can u clear what u exactly wanting...didnot understand — RbG
– RbG, Commented Jun 3, 2014 at 8:14

Community · Accepted Answer · 2023-11-17 19:55:19Z

1

i will advice you to use preg_match. using it you can get the string before first / of $_SERVER['PHP_SELF'] and string after last '/' of $_SERVER['DOCUMENT_ROOT'] and then compare them when a match is found then it will be subdir in your case

preg_match documentations ::

for additional information you can also get your root directory using

define('DIR_ROOT', dirname(__FILE__) . DIRECTORY_SEPARATOR); in your php file which is kept in your root directory(i.e. index.php,hopefully)... just saying if it helps you

edited Nov 17, 2023 at 19:55

CommunityBot

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answered Jun 3, 2014 at 8:39

RbG

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Community · Accepted Answer · 2023-11-20 22:45:59Z

0

If you want the base url, than you are trying the wrong thing. You need to try this

<?php echo "http://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI']; ?>

This question is already answered here :

How do I get the base URL with PHP?

OR refer to the PHP documentation here

edited Nov 20, 2023 at 22:45

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answered Jun 3, 2014 at 8:18

almaruf

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2 Comments

user007 Over a year ago

NO this will not work for me, cuz if I try to get REQUESTED_URI from sub directory then this will give current directory.

almaruf Over a year ago

If I am not wrong you are trying this ? $ss = 'var/www/subdir'; $ps = '/subdir/index.php/'; $ss = end(explode('/', $ss)); $ps = explode('/', $ps); $ps = $ps[1]; $foo = null; if($ps == $ss){ $foo = $ps; } echo $foo;

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