3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 'foo'; switch ($foo) { case 'foo': echo "first foo\n"; case 'bar': echo "bar, or fallthrough\n"; $foo = 'bar'; break; case 'foo': echo "second foo\n"; break; case 'bar': echo "second bar (unreachable)\n"; break; default: echo "default\n"; break; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
first foo bar, or fallthrough

preferences:
250.11 ms | 405 KiB | 307 Q