WP AFC - include acf if not already active

plugin.php

<?php

add_action('init', 'acsab_init', 0);
function acsab_init(){
    if((! is_plugin_active('advanced-custom-fields/acf.php'))&& ( ! is_plugin_active('advanced-custom-fields-pro/acf.php')))
{
    // Define path and URL to the ACF plugin.
    define( 'ACSAB_ACF_PATH', 'inc/acf/' );
    define( 'ACSAB_ACF_URL', plugin_dir_url( __FILE__ ) . 'inc/acf/' );

    // Include the ACF plugin.
    require_once( ACSAB_ACF_PATH . 'acf.php' );

    // Customize the url setting to fix incorrect asset URLs.
    add_filter('acf/settings/url', 'acsab_acf_settings_url');
    function acsab_acf_settings_url( $url ) {
        return ACSAB_ACF_URL;
    }

    // (Optional) Hide the ACF admin menu item.
    //add_filter('acf/settings/show_admin', 'acsab_acf_settings_show_admin');
    function acsab_acf_settings_show_admin( $show_admin ) {
        //return false;
    }
}
}