3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = function() { return null; }; echo (int)isset( $foo ); // TRUE because you're testing $foo echo '-'; echo (int)isset( $foo() ); // FALSE because you're testing $foo's response

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)
7.0.10.0130.07720.09
7.0.00.0130.08020.20
5.6.160.0100.07320.54
5.6.150.0070.06018.21
5.6.140.0030.04318.14
5.6.130.0070.05018.26
5.6.120.0100.04720.99
5.6.110.0170.06020.98
5.6.100.0030.04321.01
5.6.90.0000.04720.98
5.6.80.0030.05720.41
5.5.300.0100.08018.09
5.5.290.0100.07017.92
5.5.280.0100.05020.88
5.5.270.0000.04720.89
5.5.260.0100.08020.97
5.5.250.0070.04320.69
5.5.240.0270.07020.26

preferences:
142.6 ms | 1398 KiB | 7 Q