3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php print_r( strlen (pack("a4s", "aaaa", 1) ));
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.3.0rc3
6