3v4l.org

run code in 500+ PHP versions simultaneously
<?php define('FOOD', 'pizza'); putenv('FOOD=salad'); echo FOOD; echo PHP_EOL; echo getenv('FOOD');
Output for 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
pizza salad
preferences:
91.81 ms | 1123 KiB | 4 Q