run code in 200+ php & hhvm versions
Bugs & Features
<?php $data_array = array('root1' => array(1,2,3), 'root2' => array(3,4,5)); foreach ($data_array as $key => $value) { $out = ''; echo $key.'=>['; foreach ($value as $val) { $out.=$val.','; } $out = rtrim($out, ",") echo $out; echo ']'; }

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)