Medium
What does this example show?
$b = 12;
echo $a ?? $b;
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3
PHP code that throws a TypeError4
Use the match expression in PHP to print a string.5
PHP function with named and positional arguments.4
Which function signature is valid?7
PHP code that throws an error.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;
}
```