3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo substr("1c72f7597f1aa9e994f648342a", 1); // возвращает "d"
based on bZXSk
Output for 4.3.0 - 5.0.5, 5.1.1 - 7.2.0
c72f7597f1aa9e994f648342a
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/GdH4n on line 2
Process exited with code 255.