How Can I Check if mod_rewrite is Enabled in PHP on Apache and IIS?

Checking for mod_rewrite Availability in PHP on Apache and IIS

Mod_rewrite is an essential module in web server configurations for URL rewriting and enhancing website functionality. In PHP, determining whether mod_rewrite is enabled is crucial for leveraging its capabilities.

For Apache, PHP provides the apache_get_modules() function to obtain a list of enabled modules. To check for mod_rewrite in Apache, one can use:

<?php if (in_array('mod_rewrite', apache_get_modules())) {
    // Mod_rewrite is enabled
} else {
    // Mod_rewrite is not enabled
}
?>

Determining mod_rewrite availability on IIS requires a workaround since PHP does not have a native function for this. One approach is to utilize the shell_exec() function to execute the Apache command:

<?php if (strpos(shell_exec('/usr/local/apache/bin/apachectl -l'), 'mod_rewrite') !== false) {
    // Mod_rewrite is enabled
} else {
    // Mod_rewrite is not enabled
}
?>

This technique works by invoking the Apache control command and examining the output for the string 'mod_rewrite'. If the string is present, mod_rewrite is enabled. Note that the command path and executable name may vary depending on the IIS installation.

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