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run code in 300+ PHP versions simultaneously
<?php namespace Example; class Base { static function whoAmI() { return static::class; } } class Child extends Base {} $what = __NAMESPACE__ . '\Child'; var_dump($what::whoAmI());
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
string(13) "Example\Child"

preferences:
166.05 ms | 404 KiB | 185 Q