# NoWhitespace

- `v::noWhitespace()`

Validates if a string contains no whitespace (spaces, tabs and line breaks);

```php
v::noWhitespace()->validate('foo bar');  //false
v::noWhitespace()->validate("foo\nbar"); // false
```

This is most useful when chaining with other validators such as `v::alnum()`

***
See also:

  * [Alnum](Alnum.md)
  * [Alpha](Alpha.md)
  * [NotBlank](NotBlank.md)
  * [NotEmpty](NotEmpty.md)
  * [NotOptional](NotOptional.md)
  * [Optional](Optional.md)