run code in 200+ php & hhvm versions
Bugs & Features
<?php class Magic { protected $v = array("a" => 1, "b" => 2, "c" => 3); public function &__get($v) { return $this->v[$v]; } } $m = new Magic(); var_dump($m->d); $m->d[] = 4; var_dump($m->d); echo $m->d[0];

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)