run code in 200+ php & hhvm versions
Bugs & Features
<?php $serialized_array = serialize(array(1234=>"foobar")); echo "Serialized Array: $serialized_array" . PHP_EOL; $array = unserialize($serialized_array); print_r($array); if (array_key_exists(1234, $array)) { echo "Key Exists!"; } else { echo "Key Not Found!"; }
based on 8hU2B

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).
Note: hhvm uses a JIT which only kicks in after a few runs. Since we run scripts only once, hhvm always runs slower.

VersionSystem time (s)User time (s)Memory (MiB)