Medium
What will this code display?
<?php
readonly class ParameterInput
{
public function __construct(
public string $key,
public mixed $value = null
)
{}
}
$myInput = new ParameterInput("myKey");
$myInput->value = "myValue";
echo $myInput->value;
Author: JérômeStatus: PublishedQuestion passed 149 times
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Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```