3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace A; $closure = function() { echo __NAMESPACE__; }; namespace B; $closure = function() { echo __NAMESPACE__; }; namespace C; $closure();
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1
B

preferences:
72.93 ms | 407 KiB | 5 Q