3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_SESSION['fr_nick'] = null; var_dump( [ isset( $_SESSION['fr_nick'] ), array_key_exists('fr_nick', $_SESSION) ] );

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)
8.3.60.0060.01516.63
8.3.50.0090.01121.27
8.3.40.0180.00018.66
8.3.30.0000.01418.55
8.3.20.0030.00620.26
8.3.10.0060.00323.48
8.3.00.0040.00423.56
8.2.180.0030.01516.38
8.2.170.0120.00422.96
8.2.160.0100.00320.30
8.2.150.0000.00824.18
8.2.140.0050.00324.66
8.2.130.0050.00319.83
8.2.120.0040.00426.35
8.2.110.0000.00922.11
8.2.100.0040.00817.79
8.2.90.0040.00418.24
8.2.80.0000.00817.97
8.2.70.0040.00417.93
8.2.60.0070.00418.05
8.2.50.0070.00418.10
8.2.40.0070.00020.77
8.2.30.0040.00419.49
8.2.20.0060.00317.73
8.2.10.0030.00618.03
8.2.00.0060.00318.16
8.1.280.0140.00025.92
8.1.270.0000.01423.99
8.1.260.0050.00328.09
8.1.250.0040.00428.09
8.1.240.0060.00323.98
8.1.230.0110.00022.68
8.1.220.0040.00417.79
8.1.210.0000.00818.77
8.1.200.0000.00817.35
8.1.190.0070.00317.22
8.1.180.0040.00418.10
8.1.170.0090.00018.55
8.1.160.0000.00722.00
8.1.150.0040.00418.78
8.1.140.0000.00819.48
8.1.130.0030.00317.75
8.1.120.0020.00517.38
8.1.110.0050.00217.27
8.1.100.0000.00717.34
8.1.90.0030.00517.41
8.1.80.0000.00717.32
8.1.70.0000.00717.40
8.1.60.0000.00817.54
8.1.50.0030.00517.42
8.1.40.0040.00417.54
8.1.30.0040.00817.62
8.1.20.0060.00317.70
8.1.10.0040.00417.47
8.1.00.0050.00317.46
8.0.300.0040.00420.08
8.0.290.0000.00916.58
8.0.280.0030.00318.47
8.0.270.0000.00717.18
8.0.260.0000.00617.16
8.0.250.0070.00016.93
8.0.240.0040.00416.84
8.0.230.0030.00316.85
8.0.220.0040.00416.81
8.0.210.0000.00816.72
8.0.200.0030.00316.74
8.0.190.0000.00816.92
8.0.180.0000.00816.70
8.0.170.0080.00016.85
8.0.160.0030.00316.78
8.0.150.0070.00016.76
8.0.140.0070.00016.66
8.0.130.0000.00513.25
8.0.120.0000.00816.76
8.0.110.0040.00416.81
8.0.100.0000.00716.63
8.0.90.0040.00416.86
8.0.80.0090.00616.80
8.0.70.0070.00316.88
8.0.60.0000.00816.71
8.0.50.0040.00416.69
8.0.30.0100.01117.21
8.0.20.0090.01017.40
8.0.10.0040.00416.87
8.0.00.0080.00916.71
7.4.330.0020.00216.63
7.4.320.0000.00616.41
7.4.300.0050.00316.58
7.4.290.0020.00516.59
7.4.280.0040.00816.61
7.4.270.0060.00016.50
7.4.260.0000.00716.36
7.4.250.0040.00416.45
7.4.240.0030.00316.40
7.4.230.0000.00716.37
7.4.220.0060.01216.46
7.4.210.0070.00716.68
7.4.200.0060.00316.38
7.4.160.0040.01216.53
7.4.150.0030.01517.40
7.4.140.0120.00917.86
7.4.130.0120.00616.49
7.4.120.0110.00516.59
7.4.110.0070.01016.44
7.4.100.0110.00616.51
7.4.90.0100.01416.49
7.4.80.0100.00719.39
7.4.70.0040.01116.54
7.4.60.0060.00916.42
7.4.50.0060.00616.49
7.4.40.0060.01016.55
7.4.30.0090.00816.71
7.4.00.0070.00715.15
7.3.330.0000.00513.20
7.3.320.0000.00613.07
7.3.310.0040.00416.24
7.3.300.0030.00316.32
7.3.290.0060.01016.34
7.3.280.0080.00916.40
7.3.270.0030.01317.40
7.3.260.0030.01316.35
7.3.240.0130.00516.39
7.3.230.0110.01416.39
7.3.210.0060.01516.50
7.3.200.0130.01019.39
7.3.190.0060.01016.25
7.3.180.0100.00716.45
7.3.170.0140.00816.57
7.3.160.0060.00916.14
7.3.120.0070.00714.49
7.3.110.0030.01014.86
7.3.100.0060.00614.55
7.3.90.0040.00714.75
7.3.80.0100.00714.92
7.3.70.0100.00314.62
7.3.60.0030.00614.75
7.3.50.0090.00614.45
7.3.40.0000.01014.56
7.3.30.0040.00714.50
7.3.20.0100.00316.56
7.3.10.0060.00716.69
7.3.00.0050.00716.73
7.2.330.0090.00916.61
7.2.320.0140.00316.66
7.2.310.0110.00616.38
7.2.300.0100.00716.52
7.2.290.0060.01216.78
7.2.240.0040.01114.83
7.2.230.0030.00615.01
7.2.220.0040.00814.94
7.2.210.0060.00814.86
7.2.200.0050.00514.76
7.2.190.0100.00314.96
7.2.180.0030.01314.89
7.2.170.0100.00315.13
7.2.160.0110.00415.21
7.2.150.0140.00017.09
7.2.140.0000.00916.84
7.2.130.0070.00316.71
7.2.120.0080.01016.56
7.2.110.0080.00616.82
7.2.100.0080.00516.89
7.2.90.0030.01016.87
7.2.80.0080.00517.01
7.2.70.0080.00616.98
7.2.60.0070.00716.86
7.2.50.0080.00716.99
7.2.40.0060.00716.91
7.2.30.0050.00716.95
7.2.20.0060.00816.82
7.2.10.0050.00817.08
7.2.00.0030.01017.61
7.1.330.0040.01115.73
7.1.320.0030.01415.63
7.1.310.0120.00015.52
7.1.300.0040.00715.52
7.1.290.0100.00315.81
7.1.280.0040.01215.82
7.1.270.0060.00615.56
7.1.260.0070.01015.73
7.1.250.0020.01115.79
7.1.200.0000.01215.68
7.1.100.0060.00617.73
7.1.70.0030.00717.09
7.1.60.0120.01219.30
7.1.50.0250.01434.86
7.1.00.0030.07722.36
7.0.200.0060.00316.76
7.0.60.0200.03721.71
7.0.50.0100.04017.84
7.0.40.0100.08320.12
7.0.30.0270.05320.17
7.0.20.0200.07320.00
7.0.10.0070.05720.18
7.0.00.0170.07319.95
5.6.280.0000.04021.11
5.6.210.0130.07320.66
5.6.200.0000.05718.14
5.6.190.0070.04320.45
5.6.180.0400.04020.77
5.6.170.0230.05720.39
5.6.160.0030.08020.40
5.6.150.0100.07718.21
5.6.140.0070.05018.14
5.6.130.0100.08018.17
5.6.120.0130.07720.98
5.6.110.0000.09020.97
5.6.100.0100.07320.88
5.6.90.0130.03321.02
5.6.80.0070.07720.35
5.5.350.0130.08720.34
5.5.340.0070.06018.02
5.5.330.0100.03720.37
5.5.320.0630.06320.30
5.5.310.0170.05720.28
5.5.300.0130.05717.95
5.5.290.0030.07717.91
5.5.280.0030.04320.67
5.5.270.0100.04020.79
5.5.260.0030.08720.87
5.5.250.0030.04020.54
5.5.240.0130.07720.13

preferences:
52.31 ms | 401 KiB | 5 Q