3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = (object)['a' => (object)['b' => 1]]; var_dump($a->a->b); var_dump(empty($a->a->b);

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)
7.0.00.0130.05020.07
5.6.160.0070.07020.71
5.6.150.0030.04018.17
5.6.140.0070.03718.16
5.6.130.0070.07318.18
5.6.120.0130.06720.96
5.6.110.0070.08721.09
5.6.100.0100.08321.01
5.6.90.0200.07021.12
5.6.80.0070.08020.39
5.5.300.0070.08017.95
5.5.290.0030.04317.98
5.5.280.0230.05720.77
5.5.270.0070.05020.84
5.5.260.0130.07720.64
5.5.250.0130.08020.50
5.5.240.0300.07020.07

preferences:
144.07 ms | 1394 KiB | 7 Q