3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $hashn = hash_hmac('sha256', '', '7d87ae991cd4854952ebc9a6bea989ae1ec8974983c22cb9d27ee0e60113b1e1'); var_dump($hashn);
Output for 5.1.2 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(64) "22b53f3d69729bfad96a515595884949fefa744db7c8e1c3ddbca0149b1c1dcd"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.1.1
Fatal error: Call to undefined function hash_hmac() in /in/uueNs on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: hash_hmac() in /in/uueNs on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: hash_hmac() in /in/uueNs on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: hash_hmac() in /in/uueNs on line 2