How to check whether Suhosin is installed?

Question

I'm not familiar with Suhosin (never used it) but if possible I need to check using PHP whether it is installed. This is for part of an installer that I'm writing. Thanks.

Answer 1

extension_loaded('suhosin');

PHP docs for extension_loaded.

If the extension doesn't load, it may still be available through dl:

if (!extension_loaded('suhosin')) {
    if (!dl('suhosin.so')) {
        // Extension not loaded.
        return false;
    }
}

// Extension loaded.
return true;

Answer 2

I found only that there is the way to determine it - to put phpinfo() output to variable and to check Suhosin keywords:

<?php
ob_start();
phpinfo();
$phpinfo = ob_get_contents();
ob_end_clean();
if (strpos($phpinfo, "Suhosin") !== FALSE)
    echo "Installed";
?>

Answer 3

You can test if a configuration open is set for Suhosin:

$isSuhosinInstalled = ini_get('suhosin.session.max_id_length') !== '';