3v4l.org

run code in 300+ PHP versions simultaneously
<?php Echo date("Y-m-d", strtotime("2 weeks")).PHP_EOL; // 2017-10-15 Echo date("Y-m-d", strtotime("15 days")).PHP_EOL; // 2017-10-16 Echo date("Y-m-d", strtotime("+.5 months")).PHP_EOL; // not valid, returns 1970-01-01

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).

VersionSystem time (s)User time (s)Memory (MiB)
vld0.1040.00915.36
4.3.00.0040.0207.50
git.master0.0080.00815.33
rfc.partials0.0080.00817.02

preferences:
355.78 ms | 454 KiB | 5 Q