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Comment déclare-t-on une propriété dans une classe PHP ?
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3
PHP code that throws a TypeError7
PHP code that throws an error.4
Which function signature is valid?4
Attributes are metadata that can be added to classes, properties, constants or methods.5
PHP function with named and positional arguments.4
Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```4
Use the match expression in PHP to print a string.