3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Base { protected static $cached = null; public static function describe() { echo "--> " . ($calculated = "I am a " . get_called_class() . "\n"); if (static::$cached === null) { static::$cached = $calculated; } return static::$cached; } } class Animal extends Base { } class Cat extends Animal { } class Dog extends Animal { } echo Cat::describe(); echo Dog::describe(); echo Animal::describe();

This is an error 500

Value for `_results` contains invalid data `array`


preferences:
153.48 ms | 2788 KiB | 10 Q