3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(strlen(null)); var_dump(strlen(0)); var_dump(strlen(1234)); var_dump(strlen("")); var_dump(strlen("0")); var_dump(strlen(true)); var_dump(strlen(false)); var_dump(strlen("false"));
based on gHQp2
Output for 4.3.0 - 7.1.0
int(0) int(1) int(4) int(0) int(1) int(1) int(0) int(5)