1# Callback 2 3- `v::callback(callable $callback)` 4 5This is a wildcard validator, it uses a function name, method or closure 6to validate something: 7 8```php 9v::callback('is_int')->validate(10); // true 10``` 11 12(Please note that this is a sample, the `v::intVal()` validator is much better). 13 14As in `v::call()`, you can pass a method or closure to it. 15 16*** 17See also: 18 19 * [Call](Call.md) 20 * [CallableType](CallableType.md) 21 * [FilterVar](FilterVar.md) 22