Hide "apply for job" button for employers in WP Job Manager

functions.php

<?php
add_filter('job_manager_candidates_can_apply','block_employer_applying');
function block_employer_applying($can_apply ){
    $current_user = wp_get_current_user();
    $user_id = get_current_user_id();
    $roles = $current_user->roles;
    $role = array_shift( $roles ); 
	if($role ==  'employer' ) {
		$can_apply = false;
	} else {
		$can_apply = true;
	}
	return $can_apply;

}
?>