3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x=array('a'=>null); var_dump(isset($x['a'], array_key_exists('a', $x));

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)
5.4.10.0170.04016.57
5.4.00.0100.06715.74
5.3.110.0100.07014.48
5.3.100.0100.04714.13
5.3.90.0000.04713.90
5.3.80.0000.04013.80
5.3.70.0030.05713.97
5.3.60.0000.05013.96
5.3.50.0000.04013.75
5.3.40.0130.05713.87
5.3.30.0030.04013.72
5.3.20.0000.04313.50
5.3.10.0100.06013.59
5.3.00.0070.06713.58

preferences:
142.55 ms | 1394 KiB | 7 Q