[WORDPRESS] Useful filter that allows to exclude specific plugins from a specified ajax action improving performances

wp_option_active_plugins_filter.php

/**
 * Useful filter that allows to exclude specific plugins from a specified ajax action improving performances
 * Depending on quantity of active plugin, it can extremely speedup your ajax calls 
 * NOTE: to exclude plugins from specific pages improving website response please use Plugin Organizer https://it.wordpress.org/plugins/plugin-organizer/
 */
add_filter('option_active_plugins', function ($plugins) {
    if (!defined('DOING_AJAX') || !DOING_AJAX)
        return $plugins;

    // CONFIGURATION:
    // action (regex string) => plugins
    // examples:
    $whitelist_plugins = array(
        "/ap_ajax/" => array(
            "anspress-question-answer/anspress-question-answer.php",
            "mycred/mycred.php"
        ),
        // simple-press
        "/^spForum(.*)/" => array(
            "simple-press/sp-control.php",
            "mycred/mycred.php"
        ),
    );

    $global_whitelist = array(
        "wp-performance-pack/wp-performance-pack.php",
        "plugin-organizer/plugin-organizer.php"
    );
    // CONFIGURATION END

    $wt = null;

    $action = "";
    if ((isset($_POST["action"]) && $action = $_POST["action"]) || (isset($_GET["action"]) && $action = $_GET["action"])) {
        foreach ($whitelist_plugins as $key => $value) {
            if (preg_match($key,$action))
               $wt = $value;
        }
    }

    if ($wt) {
        foreach ($plugins as $key => $plugin) {
            if (in_array($plugin, $wt) || in_array($plugin, $global_whitelist))
                continue;

            unset($plugins[$key]);
        }
    }

    return $plugins;
});