respect-validation/docs/validators/BoolVal.md
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<!--
SPDX-FileCopyrightText: (c) Respect Project Contributors
SPDX-License-Identifier: MIT
-->
# BoolVal
- `BoolVal()`
Validates if the input results in a boolean value:
```php
v::boolVal()->assert('on');
// Validation passes successfully
v::boolVal()->assert('off');
// Validation passes successfully
v::boolVal()->assert('yes');
// Validation passes successfully
v::boolVal()->assert('no');
// Validation passes successfully
v::boolVal()->assert(1);
// Validation passes successfully
v::boolVal()->assert(0);
// Validation passes successfully
```
## Templates
### `BoolVal::TEMPLATE_STANDARD`
| Mode | Template |
| ---------: | :-------------------------------------- |
| `default` | {{subject}} must be a boolean value |
| `inverted` | {{subject}} must not be a boolean value |
## Template placeholders
| Placeholder | Description |
| ----------- | ---------------------------------------------------------------- |
| `subject` | The validated input or the custom validator name (if specified). |
## Categorization
- Booleans
- Types
## Changelog
| Version | Description |
| ------: | :---------- |
| 1.0.0 | Created |
## See Also
- [BoolType](BoolType.md)
- [CallableType](CallableType.md)
- [FloatType](FloatType.md)
- [FloatVal](FloatVal.md)
- [IntType](IntType.md)
- [NullType](NullType.md)
- [ObjectType](ObjectType.md)
- [ResourceType](ResourceType.md)
- [StringType](StringType.md)
- [TrueVal](TrueVal.md)