3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface CoreInterface{ const TEST = 'works'; const TEST1 = 'works'; const TEST2 = 'works'; const TEST3 = 'works'; const TEST4 = 'works'; } trait YamlTrait { protected $ymlFiles = []; public function __construct() { echo implode(',',(new \ReflectionClass(CoreInterface::class))->getConstants()); } } class Test{ use YamlTrait; } new Test;
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
works,works,works,works,works

preferences:
232.29 ms | 404 KiB | 330 Q