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What are WeakMap data structures?
Author: W3D TeamStatus: PublishedQuestion passed 1077 times
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Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```5
PHP function with named and positional arguments.4
Which function signature is valid?7
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Attributes are metadata that can be added to classes, properties, constants or methods.4
Use the match expression in PHP to print a string.3
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