store constant variable on server via .htaccess

I would like to store the INDEX_URL constant the easiest way possible.

There is a developer site and a normal site. If there is any change on the developer site, I would like to just copy the entire files but this constant is not the same on the 2 sites.

I have made this test:

putenv("TEST=TEST");
var_dump(getenv('TEST')); //TEST

//putenv("TEST=TEST");
var_dump(getenv('TEST')); //false

JavaScript
​x
 
putenv("TEST=TEST");var_dump(getenv('TEST')); //TEST​//putenv("TEST=TEST");var_dump(getenv('TEST')); //false​

It seems it does not store the value.

Alternative method:

define('__INDEX_URL__',"http://".$_SERVER['SERVER_NAME']."/index.php");

JavaScript
 
define('__INDEX_URL__',"http://".$_SERVER['SERVER_NAME']."/index.php");​

Answer

You can save it as environment variable. Put this in .htaccess:

SetEnv INDEX_URL http://example.com/index.php

JavaScript
 
SetEnv INDEX_URL http://example.com/index.php​

And get it in PHP:

$indexUrl = getenv('INDEX_URL');

JavaScript
 
$indexUrl = getenv('INDEX_URL');​

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Answer