3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { function isHTML() { echo "lower\n"; } } class b extends a { function IsHTML() { echo "upper\n"; } } $bb = new b(); $bb->isHTML(); $bb->IsHTML();
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.5 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
upper upper

preferences:
158.5 ms | 404 KiB | 208 Q