3v4l.org

run code in 300+ PHP versions simultaneously
<?php $variable = range(1, 1000); echo memory_get_usage(true), PHP_EOL; function foo($var) {} foo($variable); echo memory_get_usage(true);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
2097152 2097152
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
524288 524288

preferences:
170.07 ms | 401 KiB | 196 Q