Hard
What does this code display?
<?php
echo $a?->b() ?? 'test';
Edit
-1
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5
Check if a value is in an array in PHP5
PHP function with named and positional arguments.4
Attributes are metadata that can be added to classes, properties, constants or methods.9
PHP code that throws an error.4
Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```5
Which function signature is valid?4
Use the match expression in PHP to print a string.