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Document array shape unsealing syntax #9784

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May 14, 2023
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Document array shape unsealing syntax #9784

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11 changes: 11 additions & 0 deletions docs/annotating_code/type_syntax/array_types.md
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Expand Up @@ -203,6 +203,17 @@ $options['verbose'] = isset($options['verbose']);
handleOptions($options);
```

`...` is a shorthand for `...<array-key, mixed>` you can use other array generic types to provide more information about the open shape.

```php
// This is an open array
/** @param array{someKey: string, ...} */
// Which is the same as
/** @param array{someKey: string, ...<array-key, mixed>} */
// But it can be further locked down with a shape ...<TKey, TValue>
/** @return array{someKey: string, ...<int, bool>} */
```

## Callable arrays

An array holding a callable, like PHP's native `call_user_func()` and friends supports it:
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