run code in 200+ php & hhvm versions
Bugs & Features
<?php $to_date = time("2014-01-02"); // Input your date here e.g. strtotime("2014-01-02") $from_date = strtotime("2012-01-31"); $day_diff = $to_date - $from_date; echo floor($day_diff/(60*60*24)); - See more at: http://www.w3resource.com/php-exercises/php-date-exercises.php#sthash.r2qN7FpE.dpuf

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)