3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A {$a;} $a = new A; echo intval(is_null($a->$a));

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)
5.6.120.0070.07321.00
5.6.110.0030.06321.13
5.6.100.0100.04320.98
5.6.90.0100.08021.08
5.6.80.0130.06020.36
5.5.280.0030.05020.73
5.5.270.0130.08020.77
5.5.260.0100.06720.87
5.5.250.0100.04020.61
5.5.240.0430.05720.14
5.4.440.0330.06319.34
5.4.430.0170.06319.46
5.4.420.0170.06719.47
5.4.410.0230.07019.04
5.4.400.0170.07319.16
5.4.390.0300.06319.29
5.4.380.0230.06719.23
5.4.370.0230.06719.37
5.4.360.0200.06019.25
5.4.350.0230.07318.87
5.4.340.0300.06719.20
5.4.320.0200.05719.14
5.4.310.0400.06319.38
5.4.300.0100.06019.15
5.4.290.0230.06019.14
5.4.280.0100.07018.84
5.4.270.0300.06318.87
5.4.260.0330.05719.28
5.4.250.0300.05718.99
5.4.240.0230.05319.15
5.4.230.0170.05719.36
5.4.220.0200.05018.97
5.4.210.0270.05319.28
5.4.200.0200.05016.88
5.4.190.0300.04318.93
5.4.180.0200.05319.17
5.4.170.0130.06319.07
5.4.160.0200.07318.88
5.4.150.0230.04719.02
5.4.140.0200.05016.46
5.4.130.0270.04316.73
5.4.120.0170.05016.46
5.4.110.0230.04316.56
5.4.100.0170.05316.40
5.4.90.0170.05016.39
5.4.80.0330.04316.42
5.4.70.0300.04016.49
5.4.60.0170.05016.30
5.4.50.0270.04016.28
5.4.40.0170.05016.41
5.4.30.0170.05016.39
5.4.20.0070.06016.39
5.4.10.0200.05716.52
5.4.00.0270.04316.18
5.3.290.0230.05314.57
5.3.280.0170.07014.64
5.3.270.0370.06014.66
5.3.260.0200.06014.65
5.3.250.0270.04314.65
5.3.240.0270.04714.51
5.3.230.0200.05014.68
5.3.220.0130.05714.48
5.3.210.0100.06014.79
5.3.200.0230.06014.42
5.3.190.0130.05714.54
5.3.180.0170.05314.61
5.3.170.0200.05314.71
5.3.160.0270.06014.57
5.3.150.0200.05014.46
5.3.140.0200.05014.54
5.3.130.0030.06714.77
5.3.120.0170.05314.52
5.3.110.0100.06014.44
5.3.100.0100.05714.05
5.3.90.0200.06014.26
5.3.80.0130.06313.94
5.3.70.0270.04014.08
5.3.60.0230.04314.00
5.3.50.0270.04313.80
5.3.40.0230.05313.84
5.3.30.0130.05013.80
5.3.20.0100.06013.55
5.3.10.0330.04713.66
5.3.00.0230.04313.64
5.2.170.0130.04311.15
5.2.160.0100.03711.05
5.2.150.0170.03711.00
5.2.140.0030.05011.29
5.2.130.0070.04311.20
5.2.120.0470.04311.01
5.2.110.0330.04311.24
5.2.100.0130.04711.25
5.2.90.0470.04710.96
5.2.80.0430.03711.10
5.2.70.0330.04011.02
5.2.60.0200.03711.05
5.2.50.0030.04710.92
5.2.40.0200.03710.91
5.2.30.0170.04011.02
5.2.20.0100.04311.18
5.2.10.0200.03311.08
5.2.00.0130.03710.81
5.1.60.0200.03310.81
5.1.50.0130.03710.81
5.1.40.0200.03010.81
5.1.30.0200.03010.81
5.1.20.0230.03010.81
5.1.10.0070.04310.81
5.1.00.0200.04010.81
5.0.50.0070.03010.81
5.0.40.0100.02310.81
5.0.30.0030.04710.81
5.0.20.0130.02010.81
5.0.10.0070.02710.81
5.0.00.0070.04310.81
4.4.90.0030.02310.81
4.4.80.0070.02010.81
4.4.70.0070.02310.81
4.4.60.0070.02310.81
4.4.50.0070.03310.81
4.4.40.0000.04310.81
4.4.30.0030.02310.81
4.4.20.0130.01710.81
4.4.10.0100.01710.81
4.4.00.0170.03010.81
4.3.110.0070.03010.81
4.3.100.0070.03010.81
4.3.90.0030.03310.81
4.3.80.0100.03710.81
4.3.70.0100.02310.81
4.3.60.0030.02310.81
4.3.50.0070.02310.81
4.3.40.0070.03310.81
4.3.30.0030.02310.81
4.3.20.0100.01710.81
4.3.10.0030.02010.81
4.3.00.0100.0277.25

preferences:
152.92 ms | 939 KiB | 8 Q