3v4l.org

run code in 300+ PHP versions simultaneously
<?php $counts = array(); $item = 2; $counts[$item] ?? $counts[$item] = 2 : $counts[$item]++; var_dump($counts); $counts[$item] ?? $counts[$item] = 1 : $counts[$item]++; var_dump($counts);

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)
7.0.20.0300.07320.11
7.0.10.0070.04020.10
7.0.00.0030.05720.14
5.6.170.0400.07320.54
5.6.160.0170.04020.47
5.6.150.0070.08318.22
5.6.140.0070.05718.18
5.6.130.0000.08018.24
5.6.120.0000.04321.12
5.6.110.0070.03721.00
5.6.100.0100.04020.88
5.6.90.0030.04320.97
5.6.80.0070.08720.36
5.5.310.0200.03720.34
5.5.300.0100.03018.08
5.5.290.0200.06318.03
5.5.280.0070.07020.73
5.5.270.0170.06720.76
5.5.260.0100.08020.63
5.5.250.0070.04720.68
5.5.240.0270.07720.25

preferences:
143.39 ms | 1386 KiB | 7 Q