Mod-rewrite detection doesn't work when PHP is installed as CGI on 5.2.0

[Alexander Obuhovich]

When PHP is installed as CGI and not as "mod_php" into apache, then system requirements step tells, that mod rewrite is not available.

But in fact mod rewrite works absolutely normally.

I propose to improve detection as advised by http://christian.roy.name/blog/detecting-modrewrite-using-php article by setting custom environment variable in .htaccess file, like this:

<IfModule mod_rewrite.c>

// Tell PHP that the mod_rewrite module is ENABLED.

SetEnv HTTP_MOD_REWRITE On

</IfModule>

and checking it later inside PHP:

if ( function_exists('apache_get_modules') ) {

$modules = apache_get_modules();

$mod_rewrite = in_array('mod_rewrite', $modules);

} else {

$mod_rewrite =  getenv('HTTP_MOD_REWRITE')=='On' ? true : false;

}

I also recommend wrapping whole rewrite-related code inside that IfModule statement since if mod-rewrite is really unavailable, then any directive from it (e.g. RewriteEngine) could cause "500 Internal Server Error" for whole website.

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http://www.in-portal.com
http://www.alex-time.com

[Dmitry A.]

Agreed - let's create a new task for this and fix it.

DA

[Alexander Obuhovich]

Task: http://tracker.in-portal.org/view.php?id=1427

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[Dmitry Andrejev]

Guys,

FYI: proposed solution won't work unless there mod_env installed (and mod_rewrite) in Apache. I just came across the server which doesn't have mod_env which results in 500 error on installation.

It can take some time to determine why there is 500.

What if we make it look something like this:

=========

<IfModule mod_rewrite.c>

<IfModule mod_env.c>

## Tell PHP that the mod_rewrite module is ENABLED.

SetEnv HTTP_MOD_REWRITE On

</IfModule>

## Enable mod-rewrite

RewriteEngine On

        .......

</IfModule>

=========

I understand that we won't notice the error in this case and now somehow we need to notify user that mod_env is not installed so Mod-Rewrite might not work correctly in Cron.

What do you think?

DA

[Alexander Obuhovich]

Based on Apache documentation (see http://httpd.apache.org/docs/2.0/mod/mod_env.html) module "mod_env" is compiled-in by default for all Apache installations.

That was probably some custom server setup to remove this module. Same for Apache 1.3, which isn't longer maintained.

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