Medium
What does this example show?
$b = 12;
echo $a ?? $b;
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0
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5
Check if a value is in an array in PHP4
Use the match expression in PHP to print a string.4
Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```8
PHP code that throws an error.5
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.