3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = ["foo"=>"bar"]; $key = "foo"; echo "{$obj->{ ${data[$key] }}\n"; echo "{$obj->{ ${'data'}[$key] }}\n"; echo "{$obj->{ ${data}[$key] }}\n";

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)
7.0.10.0100.06020.17
7.0.00.0030.07020.13
5.6.160.0070.08720.43
5.6.150.0030.08018.22
5.6.140.0130.08018.28
5.6.130.0000.05718.16
5.6.120.0100.06320.98
5.6.110.0100.06321.11
5.6.100.0030.04720.98
5.6.90.0100.05321.10
5.6.80.0030.08320.41
5.5.300.0070.08017.98
5.5.290.0030.09017.97
5.5.280.0170.07320.84
5.5.270.0000.04320.94
5.5.260.0100.07020.72
5.5.250.0070.07020.68
5.5.240.0130.07320.18

preferences:
155.71 ms | 1394 KiB | 7 Q