is_error

Check whether variable is an Error instance.

<?php

use function Qubus\Error\Helpers\is_error;

is_error(mixed $object): bool;

$object (mixed) The object to check.

(bool) True if an Error instance, false otherwise.

<?php

use Qubus\Error\Error;

use function Qubus\Error\Helpers\is_error;

function has_permission(string $permission): Error|string
{
    if ($permission === 'invalid') {
        return new Error('The permission value is invalid');
    }
    
    return $permission;
}

$permission = has_permission('invalid');

if (is_error($permission)) {
    echo $permission->getMessage();
}