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