mirror of
https://github.com/Respect/Validation.git
synced 2026-03-14 22:35:45 +01:00
7c681fec66I ran the `bin/console spdx --fix` with different strategies for different files. For most of the core classes, since they've been drastically rebuilt, I've run it with the `git-blame` strategy, for for the `src/Validators`, in which the API changed completely but the logic remains the same, I use the `git-log` strategy.
96 lines
2.8 KiB
Markdown
96 lines
2.8 KiB
Markdown
<!--
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SPDX-License-Identifier: MIT
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SPDX-FileCopyrightText: (c) Respect Project Contributors
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SPDX-FileContributor: Alexandre Gomes Gaigalas <alganet@gmail.com>
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SPDX-FileContributor: Henrique Moody <henriquemoody@gmail.com>
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-->
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# KeyExists
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- `KeyExists(string|int $key)`
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Validates if the given key exists in an array.
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```php
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v::keyExists('name')->assert(['name' => 'The Respect Panda']);
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// Validation passes successfully
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v::keyExists('name')->assert(['email' => 'therespectpanda@gmail.com']);
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// → `.name` must be present
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v::keyExists(0)->assert(['a', 'b', 'c']);
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// Validation passes successfully
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v::keyExists(4)->assert(['a', 'b', 'c']);
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// → `.4` must be present
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v::keyExists('username')->assert(new ArrayObject(['username' => 'therespectpanda']));
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// Validation passes successfully
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v::keyExists(5)->assert(new ArrayObject(['a', 'b', 'c']));
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// → `.5` must be present
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```
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## Notes
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- To validate an array against a given validator if the key exists, use [KeyOptional](KeyOptional.md) instead.
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- To validate an array against a given validator requiring the key to exist, use [Key](Key.md) instead.
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## Templates
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### `KeyExists::TEMPLATE_STANDARD`
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| Mode | Template |
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| ---------: | :------------------------------ |
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| `default` | {{subject}} must be present |
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| `inverted` | {{subject}} must not be present |
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## Template placeholders
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| Placeholder | Description |
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| ----------- | ---------------------------------------------------------------- |
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| `subject` | The validated input or the custom validator name (if specified). |
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## Caveats
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`KeyExists` defines the given `$key` as the path, and because it is a standalone validator without children, it's not possible to display a fully custom name with it.
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When no custom name is set, the path is displayed as `{{name}}`. When a custom name is set, the validation engine prepends the path to the custom name:
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```php
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v::keyExists('foo')->assert([]);
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// → `.foo` must be present
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v::named('Custom name', v::keyExists('foo'))->assert([]);
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// → `.foo` (<- Custom name) must be present
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```
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If you want to display only a custom name while checking if a key exists, use [Key](Key.md) with [AlwaysValid](AlwaysValid.md):
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```php
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v::key('foo', v::named('Custom name', v::alwaysValid()))->assert([]);
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// → Custom name must be present
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```
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## Categorization
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- Arrays
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- Structures
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## Changelog
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| Version | Description |
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| ------: | :------------------------- |
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| 3.0.0 | Created from [Key](Key.md) |
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## See Also
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- [AlwaysValid](AlwaysValid.md)
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- [ArrayType](ArrayType.md)
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- [ArrayVal](ArrayVal.md)
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- [Each](Each.md)
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- [Key](Key.md)
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- [KeyOptional](KeyOptional.md)
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- [Property](Property.md)
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- [PropertyExists](PropertyExists.md)
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- [PropertyOptional](PropertyOptional.md)
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