3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = '\x30'; $a = str_replace($a, '\x', ''); echo hex2bin($a).'hi';
Output for 5.4.0 - 7.1.0
hi
Output for 5.0.0 - 5.3.29
Fatal error: Call to undefined function hex2bin() in /in/kPn3o on line 5
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: hex2bin() in /in/kPn3o on line 5
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: hex2bin() in /in/kPn3o on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: hex2bin() in /in/kPn3o on line 5