3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_SESSION["referer"] = ''; $_SERVER["HTTP_REFERER"] = ''; $a = !empty($_SESSION["referer"]) ? $_SESSION["referer"] : (!empty($_SERVER["HTTP_REFERER"]) ? $_SERVER["HTTP_REFERER"] : ''); print $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)
8.3.60.0140.00716.75
8.3.50.0060.01122.04
8.3.40.0100.01018.79
8.3.30.0090.00618.95
8.3.20.0080.00020.22
8.3.10.0020.00523.73
8.3.00.0040.00420.81
8.2.180.0110.00616.50
8.2.170.0070.00722.96
8.2.160.0100.00720.35
8.2.150.0080.00024.18
8.2.140.0030.00524.66
8.2.130.0110.00426.16
8.2.120.0060.00319.36
8.2.110.0060.00322.02
8.2.100.0080.00318.22
8.2.90.0060.00319.36
8.2.80.0050.00317.97
8.2.70.0000.00817.63
8.2.60.0070.00317.93
8.2.50.0030.00618.07
8.2.40.0000.00819.95
8.2.30.0070.00018.28
8.2.20.0000.00717.61
8.2.10.0040.00418.09
8.2.00.0080.00017.61
8.1.280.0040.01525.92
8.1.270.0040.00424.01
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0090.00024.02
8.1.230.0060.00619.08
8.1.220.0080.00017.74
8.1.210.0040.00418.77
8.1.200.0060.00317.23
8.1.190.0030.00617.35
8.1.180.0050.00318.10
8.1.170.0030.00518.59
8.1.160.0000.00721.91
8.1.150.0050.00318.68
8.1.140.0000.00717.34
8.1.130.0040.00417.80
8.1.120.0040.00417.45
8.1.110.0000.01117.50
8.1.100.0040.00417.43
8.1.90.0070.00017.48
8.1.80.0000.00717.41
8.1.70.0000.00717.33
8.1.60.0030.00717.48
8.1.50.0040.00417.48
8.1.40.0040.00417.47
8.1.30.0090.00017.64
8.1.20.0040.00417.56
8.1.10.0000.00817.50
8.1.00.0020.00517.54
8.0.300.0040.00418.77
8.0.290.0000.00816.75
8.0.280.0030.00318.36
8.0.270.0070.00017.16
8.0.260.0030.00317.24
8.0.250.0070.00016.91
8.0.240.0040.00416.82
8.0.230.0080.00016.86
8.0.220.0070.00016.86
8.0.210.0070.00016.77
8.0.200.0040.00416.81
8.0.190.0040.00416.92
8.0.180.0030.00516.81
8.0.170.0030.00516.88
8.0.160.0000.00716.88
8.0.150.0030.00316.81
8.0.140.0020.00516.85
8.0.130.0040.00413.35
8.0.120.0000.00916.86
8.0.110.0060.00316.89
8.0.100.0000.00816.75
8.0.90.0000.00816.66
8.0.80.0120.01016.82
8.0.70.0040.00416.99
8.0.60.0020.00516.83
8.0.50.0000.00716.94
8.0.30.0130.00716.97
8.0.20.0120.00717.40
8.0.10.0040.00416.93
8.0.00.0110.00516.70
7.4.330.0050.00015.09
7.4.320.0000.00616.51
7.4.300.0000.00616.59
7.4.290.0030.00316.59
7.4.280.0030.00316.50
7.4.270.0030.00316.49
7.4.260.0060.00316.50
7.4.250.0030.00516.54
7.4.240.0050.00316.51
7.4.230.0030.00316.48
7.4.220.0070.01116.49
7.4.210.0070.00716.39
7.4.200.0020.00516.60
7.4.160.0070.01016.56
7.4.150.0100.01317.40
7.4.140.0070.01217.86
7.4.130.0020.01516.45
7.4.120.0100.00616.60
7.4.110.0070.01316.46
7.4.100.0170.00716.52
7.4.90.0120.00616.60
7.4.80.0140.00319.39
7.4.70.0060.01016.48
7.4.60.0090.01316.52
7.4.50.0040.00016.54
7.4.40.0000.01616.51
7.4.30.0120.00316.33
7.4.00.0060.01115.07
7.3.330.0050.00013.01
7.3.320.0050.00013.11
7.3.310.0070.00016.25
7.3.300.0070.00016.09
7.3.290.0100.00316.23
7.3.280.0110.00716.27
7.3.270.0100.00717.40
7.3.260.0090.00916.40
7.3.250.0090.00816.34
7.3.240.0130.00316.54
7.3.230.0090.00916.40
7.3.210.0150.01016.62
7.3.200.0110.00719.39
7.3.190.0090.01116.33
7.3.180.0060.00916.25
7.3.170.0110.00516.48
7.3.160.0080.00816.41
7.3.120.0030.01414.74
7.3.110.0030.01314.94
7.3.100.0070.00714.65
7.3.90.0070.01314.96
7.3.80.0080.00515.03
7.3.70.0070.01015.05
7.3.60.0030.01314.79
7.3.50.0060.00614.97
7.3.40.0000.01514.83
7.3.30.0100.00314.64
7.3.20.0040.00816.47
7.3.10.0000.01316.77
7.3.00.0060.00616.41
7.2.330.0130.00716.57
7.2.320.0030.01716.25
7.2.310.0060.01016.68
7.2.300.0070.01016.66
7.2.290.0110.00616.84
7.2.250.0000.01115.04
7.2.240.0040.01814.95
7.2.230.0030.01314.96
7.2.220.0060.01314.95
7.2.210.0000.01215.24
7.2.200.0070.01014.96
7.2.190.0060.00614.71
7.2.180.0030.01014.77
7.2.170.0070.00415.06
7.1.330.0060.00615.72
7.1.320.0060.01215.82
7.1.310.0090.00615.78
7.1.300.0040.00415.80
7.1.290.0040.00415.46
7.1.280.0000.00915.78
7.1.270.0030.00916.00
7.1.260.0060.00615.89
7.1.100.0040.00717.98
7.1.70.0030.00316.87
7.1.60.0100.01319.70
7.1.50.0130.01316.95
7.1.00.0100.07022.51
7.0.200.0040.00416.80
7.0.140.0130.06322.07
7.0.120.0030.06022.04
7.0.110.0100.04021.90
7.0.100.0100.03722.10
7.0.90.0100.04022.13
7.0.80.0000.07022.13
7.0.70.0070.04022.09
7.0.60.0100.08022.05
7.0.50.0100.06322.04
7.0.40.0070.07020.06
7.0.30.0170.05720.03
7.0.20.0070.04320.09
7.0.10.0030.04319.98
7.0.00.0070.06020.12
5.6.280.0130.06321.12
5.6.270.0030.04020.79
5.6.260.0070.04020.98
5.6.250.0000.06720.89
5.6.240.0130.06720.70
5.6.230.0070.05020.87
5.6.220.0070.04020.93
5.6.210.0070.04021.01
5.6.200.0070.04721.00
5.6.190.0100.05021.01
5.6.180.0030.07020.88
5.6.170.0070.04320.77
5.6.160.0000.04720.89
5.6.150.0130.07720.78
5.6.140.0070.06020.95
5.6.130.0100.03720.87
5.6.120.0070.03720.95
5.6.110.0000.04320.88
5.6.100.0000.04320.98
5.6.90.0000.04320.96
5.6.80.0100.06020.41
5.6.70.0100.06720.23
5.6.60.0000.04020.37
5.6.50.0030.04720.35
5.6.40.0030.03720.25
5.6.30.0030.03720.37
5.6.20.0070.07020.35
5.6.10.0030.06720.13
5.6.00.0070.03720.34
5.5.380.0070.05317.63
5.5.370.0070.07717.63
5.5.360.0130.03717.55
5.5.350.0070.03717.52
5.5.340.0030.04018.02
5.5.330.0000.07017.77
5.5.320.0030.04718.16
5.5.310.0030.04018.09
5.5.300.0000.04017.86
5.5.290.0070.04718.01
5.5.280.0030.05717.84
5.5.270.0000.05017.76
5.5.260.0030.04317.97
5.5.250.0000.05017.68
5.5.240.0030.03717.52
5.5.230.0030.06717.22
5.5.220.0070.03317.22
5.5.210.0100.07317.50
5.5.200.0070.03317.12
5.5.190.0030.03717.60
5.5.180.0000.06317.45
5.5.160.0000.06717.21
5.5.150.0000.07317.20
5.5.140.0030.06317.11
5.5.130.0070.06717.47
5.5.120.0030.04317.33
5.5.110.0000.03717.47
5.5.100.0000.06317.11
5.5.90.0030.04017.25
5.5.80.0070.06017.34
5.5.70.0000.04017.08
5.5.60.0070.03317.13
5.5.50.0070.03317.40
5.5.40.0030.03717.36
5.5.30.0030.03717.10
5.5.20.0000.03717.39
5.5.10.0000.05017.11
5.5.00.0030.06717.39
5.4.450.0030.04019.27
5.4.440.0000.04719.38
5.4.430.0100.03019.39
5.4.420.0000.04019.19
5.4.410.0070.04319.14
5.4.400.0170.03719.13
5.4.390.0000.04019.21
5.4.380.0030.04318.95
5.4.370.0030.03319.12
5.4.360.0000.04318.95
5.4.350.0030.03718.92
5.4.340.0030.04718.89
5.4.320.0100.04018.93
5.4.310.0000.07718.95
5.4.300.0000.04019.23
5.4.290.0070.05719.04
5.4.280.0000.07718.92
5.4.270.0070.06718.97
5.4.260.0070.05719.10
5.4.250.0000.06019.05
5.4.240.0000.05019.11
5.4.230.0070.03319.09
5.4.220.0030.03718.88
5.4.210.0130.05018.96
5.4.200.0030.03718.94
5.4.190.0000.04719.22
5.4.180.0000.04018.87
5.4.170.0070.04018.86
5.4.160.0030.04019.19
5.4.150.0070.03718.93
5.4.140.0030.03716.14
5.4.130.0000.03716.15
5.4.120.0100.03316.26
5.4.110.0000.04016.37
5.4.100.0070.03316.46
5.4.90.0000.03716.32
5.4.80.0030.03316.18
5.4.70.0030.03316.06
5.4.60.0000.03716.20
5.4.50.0070.03016.20
5.4.40.0000.03016.16
5.4.30.0000.03016.10
5.4.20.0070.03016.28
5.4.10.0030.06016.14
5.4.00.0000.03315.86
5.3.290.0000.04314.69
5.3.280.0000.04014.66
5.3.270.0030.03714.48
5.3.260.0000.04014.68
5.3.250.0000.03714.61
5.3.240.0000.03714.50
5.3.230.0030.03714.65
5.3.220.0000.03714.56
5.3.210.0000.04014.56
5.3.200.0030.03714.64
5.3.190.0000.04014.57
5.3.180.0000.03714.58
5.3.170.0030.03714.35
5.3.160.0070.03314.42
5.3.150.0000.03714.50
5.3.140.0070.03714.63
5.3.130.0100.03014.64
5.3.120.0030.03314.45
5.3.110.0070.02714.62
5.3.100.0000.03313.98
5.3.90.0000.03313.86
5.3.80.0030.03314.07
5.3.70.0030.05013.95
5.3.60.0000.04013.86
5.3.50.0030.04713.88
5.3.40.0000.05714.02
5.3.30.0030.03713.73
5.3.20.0000.03013.52
5.3.10.0000.03713.50
5.3.00.0000.03713.51
5.2.170.0030.05011.19
5.2.160.0100.03311.30
5.2.150.0000.04711.21
5.2.140.0030.02311.07
5.2.130.0030.02710.99
5.2.120.0070.02311.04
5.2.110.0000.04711.16
5.2.100.0030.03011.02
5.2.90.0000.03010.99
5.2.80.0000.03011.25
5.2.70.0030.02710.98
5.2.60.0030.04011.08
5.2.50.0030.03010.93
5.2.40.0070.02010.92
5.2.30.0030.02710.98
5.2.20.0000.06010.87
5.2.10.0000.04710.85
5.2.00.0000.03010.85
5.1.60.0000.0239.95
5.1.50.0000.02310.14
5.1.40.0070.0439.91
5.1.30.0030.02310.23
5.1.20.0000.03010.36
5.1.10.0070.02310.23
5.1.00.0000.03710.00
5.0.50.0000.0479.64
5.0.40.0000.0239.64
5.0.30.0000.0309.64
5.0.20.0030.0209.64
5.0.10.0000.0209.64
5.0.00.0000.0339.64
4.4.90.0000.0139.64
4.4.80.0000.0209.64
4.4.70.0030.0209.64
4.4.60.0000.0209.64
4.4.50.0030.0109.64
4.4.40.0000.0239.64
4.4.30.0000.0239.64
4.4.20.0000.0139.64
4.4.10.0030.0139.64
4.4.00.0000.0579.64
4.3.110.0000.0139.64
4.3.100.0000.0209.64
4.3.90.0000.0209.64
4.3.80.0000.0279.64
4.3.70.0000.0139.64
4.3.60.0000.0139.64
4.3.50.0000.0139.64
4.3.40.0000.0239.64
4.3.30.0000.0309.64
4.3.20.0000.0179.64
4.3.10.0030.0139.64
4.3.00.0070.0109.64

preferences:
40.77 ms | 401 KiB | 5 Q