Condition Oxygen URL Parameter Elijah

<?php
add_action('plugins_loaded', 'condition_url_param_exist_elijah', 99);

function condition_url_param_exist_elijah(){
    if( function_exists('oxygen_vsb_register_condition') ) {

        global $oxy_condition_operators;

        // Condition to check if a URL parameter is present.
        oxygen_vsb_register_condition('URL Param Exists', array('options'=>array(), 'custom'=>true), array('--'), 'oxy_url_param_exists_callback', 'Other');

        function oxy_url_param_exists_callback($value, $operator) {
            if( isset($_GET[$value]) && $_GET[$value] ) {
                return true;
            } else {
                return false;
            }
        }

        // Condition to check if a URL parameter is NOT present.
        oxygen_vsb_register_condition('URL Param Does Not Exist', array('options'=>array(), 'custom'=>true), array('--'), 'oxy_url_param_not_exists_callback', 'Other');

        function oxy_url_param_not_exists_callback($value, $operator) {
        if( isset($_GET[$value]) && $_GET[$value] ) {
                return false;
            } else {
                return true;
            }
        }
    }
}