3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "Hello World!"; $b = bin2hex($a); $c = pack('H*', $b); $d = hex2bin($b); var_dump($c, $d);
based on PFqkV
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(12) "Hello World!" string(12) "Hello World!"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.3.29
Fatal error: Call to undefined function hex2bin() in /in/Lg3ZN 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/Lg3ZN 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/Lg3ZN 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/Lg3ZN on line 5