run code in 200+ php & hhvm versions
Bugs & Features
<?php interface ConfigurationProvider { public function getConfig() : array; } final class ConfigurationProviderImplementing implements ConfigurationProvider { public function getConfig() { return []; } } $provider = new ConfigurationProviderNonImplementing(); var_dump(! $provider instanceof ConfigProviderInterface && ! is_callable([$provider, 'getConfig']));
based on IUSPG

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)