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Comment déclare-t-on une propriété dans une classe PHP ?
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4
Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```5
PHP function with named and positional arguments.4
Attributes are metadata that can be added to classes, properties, constants or methods.7
PHP code that throws an error.4
Use the match expression in PHP to print a string.4
Which function signature is valid?3
PHP code that throws a TypeError