respect-validation/docs/rules/NotOptional.md

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# NotOptional
- `NotOptional()`
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Validates if the given input is not optional. By _optional_ we consider `null`
or an empty string (`''`).
```php
v::notOptional()->validate(''); // false
v::notOptional()->validate(null); // false
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```
Other values:
```php
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v::notOptional()->validate([]); // true
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v::notOptional()->validate(' '); // true
v::notOptional()->validate(0); // true
v::notOptional()->validate('0'); // true
v::notOptional()->validate(0); // true
v::notOptional()->validate('0.0'); // true
v::notOptional()->validate(false); // true
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v::notOptional()->validate(['']); // true
v::notOptional()->validate([' ']); // true
v::notOptional()->validate([0]); // true
v::notOptional()->validate(['0']); // true
v::notOptional()->validate([false]); // true
v::notOptional()->validate([[''), [0]]); // true
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v::notOptional()->validate(new stdClass()); // true
```
## Categorization
- Miscellaneous
## Changelog
Version | Description
--------|-------------
1.0.0 | Created
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***
See also:
- [NoWhitespace](NoWhitespace.md)
- [NotBlank](NotBlank.md)
- [NotEmpty](NotEmpty.md)
- [NullType](NullType.md)
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- [Number](Number.md)
- [Optional](Optional.md)