Add extra verification to AS submission process

wpas-check.php

<?php
add_filter( 'wpas_before_submit_new_ticket_checks', 'wpas_extra_submission_check' );
/**
 * Add extra verifications to the ticket submission process
 *
 * @param bool|WP_Error $go The submission authorization status
 * @return bool|WP_Error
 */
function wpas_extra_submission_check( $go ) {

	// Check something
	if ( 1 !== 2 ) {
		
		/**
		 * If the check fails, we create an error to display to the user.
		 * The $go variable could potentially be errored already (from a custom field for instance), in which case
		 * we don't want to override the existing errors. For that reason, we only create a WP_Error object if $go
		 * isn't one already.
		 */

		// Make sure $go is not already errored
		if ( ! is_wp_error( $go ) ) {
			$go = new WP_Error();
		}

		// Add a custom error message
		$go->add( 'custom_error_code', 'Explanation of why the submission fails (will be displayed to the user)' );

	}

	return $go;

}