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What is the name of the new interface that indicates that a class implements the__toString method?
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5
Check if a value is in an array in PHP5
PHP function with named and positional arguments.7
PHP code that throws an error.5
Which function signature is valid?4
Use the match expression in PHP to print a string.4
Attributes are metadata that can be added to classes, properties, constants or methods.4
Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```