How to check if mod_rewrite is enabled in php?
PhpApacheMod RewriteIisPhp Problem Overview
I was wondering if it is possible to check if mod_rewrite is enabled on Apache AND IIS in PHP.
ModRewrite for IIS exists. Check it here.
So, I'm looking for a PHP script that checks for mod_rewrite on Apache and IIS.
Does anyone know such script or can write one?
Especially for Microsoft IIS.
Thanks!
Php Solutions
Solution 1 - Php
If you're using mod_php, you can use apache_get_modules(). This will return an array of all enabled modules, so to check if mod_rewrite is enabled, you could simply do
in_array('mod_rewrite', apache_get_modules());
Unfortunately, you're most likely trying to do this with CGI, which makes it a little bit more difficult.
You can test it using the following, though
strpos(shell_exec('/usr/local/apache/bin/apachectl -l'), 'mod_rewrite') !== false
If the above condition evaluates to true, then mod_write is enabled.
Solution 2 - Php
Copy this piece of code and run it to find out.
<?php
if(!function_exists('apache_get_modules') ){ phpinfo(); exit; }
$res = 'Module Unavailable';
if(in_array('mod_rewrite',apache_get_modules()))
$res = 'Module Available';
?>
<html>
<head>
<title>A mod_rewrite availability check !</title></head>
<body>
<p><?php echo apache_get_version(),"</p><p>mod_rewrite $res"; ?></p>
</body>
</html>
Solution 3 - Php
I like Christian Roy's solution:
### .htaccess
<IfModule mod_rewrite.c>
# Tell PHP that the mod_rewrite module is ENABLED.
SetEnv HTTP_MOD_REWRITE On
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# The rest of your rewrite rules here
</IfModule>
Then, you can check in your PHP code for
array_key_exists('HTTP_MOD_REWRITE', $_SERVER);
No idea if this works also with IIS (I have no way to check) but the odds are good.
Solution 4 - Php
Upload a file called info.php with this code and run it:
<?php
phpinfo();
Search for mod_rewrite on the page, and see if you can find it under Loaded Modules.
Solution 5 - Php
don't make it so difficult you can simply find in phpinfo();
Hope helpful!
Thanks
Solution 6 - Php
via command line we in centOs we can do this
httpd -l
Solution 7 - Php
<?php
phpinfo();
?>
Look under Configuration in the apache2handler in the Loaded Modules row.
This is simple and works.
<?php foreach( apache_get_modules() as $module ) echo "$module<br />"; ?>
Solution 8 - Php
This is my current method of checking if Mod_rewrite enabled for both Apache and IIS
/**
* --------------------------------------------------------------
* MOD REWRITE CHECK
* --------------------------------------------------------------
* - By A H Abid
* Define Constant for MOD REWRITE
*
* Check if server allows MOD REWRITE. Checks for both
* Apache and IIS.
*
*/
if( function_exists('apache_get_modules') && in_array('mod_rewrite',apache_get_modules()) )
$mod_rewrite = TRUE;
elseif( isset($_SERVER['IIS_UrlRewriteModule']) )
$mod_rewrite = TRUE;
else
$mod_rewrite = FALSE;
define('MOD_REWRITE', $mod_rewrite);
It works in my local machine and also worked in my IIS based webhost. However, on a particular apache server, it didn't worked for Apache as the apache_get_modules() was disabled but the mod_rewrite was enable in that server.
Solution 9 - Php
You can get a list of installed apache modules, and check against that. Perhaps you can check if its installed by searching for its .dll (or linux equivalent) file.
Solution 10 - Php
Two lines of code:
$isEnabled = in_array('mod_rewrite', apache_get_modules());
echo ($isEnabled) ? 'Enabled' : 'Not enabled';
Solution 11 - Php
Another idea, indeed more a dirty hack, regarding mod rewrite is server dependend an not necessary a php issue: Why not, if you have the possibillity, create a test directory put a .htaccess in it rewriting to test.php, call the directory via http and check if you get the expected result you put in test.php.
Indeed, dirty.
Solution 12 - Php
One more method through exec().
exec('/usr/bin/httpd -M | find "rewrite_module"',$output);
If mod_rewrite is loaded it will return "rewrite_module" in output.
Solution 13 - Php
Use this function:
function apache_module_exists($module)
{
return in_array($module, apache_get_modules());
}
Solution 14 - Php
For IIS heros and heroins:
No need to look for mod_rewrite. Just install Rewrite 2 module and then import .htaccess files.
Solution 15 - Php
Actually, just because a module is loaded, it does not necessarily mean that the directives has been enabled in the directory you are placing the .htaccess. What you probably need is to know: Does rewriting work? The only way to find out for sure is to do an actual test: Put some test files on the server and request it with HTTP.
Good news: I created a library for doing exactly this (detecting various .htaccess capabilities). With this library, all you need to do is this:
require 'vendor/autoload.php';
use HtaccessCapabilityTester\HtaccessCapabilityTester;
$hct = new HtaccessCapabilityTester($baseDir, $baseUrl);
if ($hct->rewriteWorks()) {
// rewriting works
}
(instead of $baseDir and $baseUrl, you must provide the path to where the test files are going to be put and a corresponding URL to where they can be reached)
If you just want to know if the module is loaded, you can do the following:
if ($hct->moduleLoaded('rewrite')) {
// mod_rewrite is loaded (tested in a real .htaccess by using the "IfModule" directive)
}
The library is available here: https://github.com/rosell-dk/htaccess-capability-tester