3v4l.org

run code in 300+ PHP versions simultaneously
<?php <?php $a= array(); $a["p"] = "q"; $c = $a["p"]; echo isset($c); ?>

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)
7.0.00.0070.08720.08
5.6.160.0030.04020.39
5.6.150.0130.05018.28
5.6.140.0100.07718.28
5.6.130.0130.08018.17
5.6.120.0100.05321.03
5.6.110.0030.07321.00
5.6.100.0100.08321.01
5.6.90.0100.08021.04
5.6.80.0070.03720.39
5.5.300.0100.07717.95
5.5.290.0230.04018.04
5.5.280.0030.04020.77
5.5.270.0000.05720.79
5.5.260.0030.08720.86
5.5.250.0100.08020.69
5.5.240.0330.06020.18

preferences:
160.95 ms | 1398 KiB | 7 Q