3v4l.org

run code in 300+ PHP versions simultaneously
<?php $exists = isset($a); echo $exists;

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)
8.3.40.0140.00418.53
8.3.30.0070.00718.95
8.3.20.0040.00420.02
8.3.10.0080.00020.48
8.3.00.0030.00617.38
8.2.170.0120.00422.96
8.2.160.0070.01420.39
8.2.150.0060.00324.18
8.2.140.0030.00724.66
8.2.130.0040.00426.16
8.2.120.0070.00022.18
8.2.110.0060.00320.98
8.2.100.0060.00718.03
8.2.90.0030.00619.05
8.2.80.0040.00417.97
8.2.70.0030.00517.50
8.2.60.0030.00917.66
8.2.50.0000.00818.07
8.2.40.0040.00418.07
8.2.30.0080.00019.35
8.2.20.0070.00017.65
8.2.10.0070.00017.92
8.2.00.0050.00217.65
8.1.270.0000.00823.84
8.1.260.0030.00526.35
8.1.250.0050.00228.09
8.1.240.0060.00321.34
8.1.230.0040.00719.42
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0000.00917.23
8.1.190.0080.00017.10
8.1.180.0060.00318.10
8.1.170.0000.00818.46
8.1.160.0020.00521.97
8.1.150.0070.00018.69
8.1.140.0000.00717.29
8.1.130.0000.00717.75
8.1.120.0040.00417.28
8.1.110.0040.00417.40
8.1.100.0000.00717.46
8.1.90.0000.00717.26
8.1.80.0000.00717.32
8.1.70.0070.00017.24
8.1.60.0060.00317.51
8.1.50.0030.00517.43
8.1.40.0080.00017.39
8.1.30.0000.00817.49
8.1.20.0050.00317.50
8.1.10.0040.00417.54
8.1.00.0040.00417.48
8.0.300.0000.00718.77
8.0.290.0060.00316.75
8.0.280.0040.00418.43
8.0.270.0030.00317.29
8.0.260.0030.00317.16
8.0.250.0040.00416.93
8.0.240.0050.00316.92
8.0.230.0000.00716.92
8.0.220.0040.00416.72
8.0.210.0030.00316.70
8.0.200.0040.00416.88
8.0.190.0060.00316.77
8.0.180.0030.00516.82
8.0.170.0040.00416.90
8.0.160.0030.00316.81
8.0.150.0000.00716.77
8.0.140.0070.00016.83
8.0.130.0050.00013.25
8.0.120.0030.00516.68
8.0.110.0000.00716.83
8.0.100.0050.00316.81
8.0.90.0040.00416.85
8.0.80.0110.00816.81
8.0.70.0000.00716.86
8.0.60.0040.00416.73
8.0.50.0050.00316.75
8.0.30.0120.00916.78
8.0.20.0110.00817.40
8.0.10.0050.00317.04
8.0.00.0100.00716.78
7.4.330.0060.00015.00
7.4.320.0030.00316.36
7.4.300.0030.00316.43
7.4.290.0040.00416.44
7.4.280.0040.00416.52
7.4.270.0000.00616.46
7.4.260.0040.00416.48
7.4.250.0040.00416.35
7.4.240.0040.00316.43
7.4.230.0000.00716.60
7.4.220.0090.01216.41
7.4.210.0070.00716.40
7.4.200.0030.00316.41
7.4.160.0070.01016.35
7.4.150.0100.00917.40
7.4.140.0120.00817.86
7.4.130.0080.00816.42
7.4.120.0110.00616.43
7.4.110.0130.00316.48
7.4.100.0100.00716.34
7.4.90.0100.01016.49
7.4.80.0090.00919.39
7.4.70.0030.01416.20
7.4.60.0130.00316.28
7.4.50.0040.00416.05
7.4.40.0070.01016.48
7.4.30.0100.00716.52
7.4.00.0070.01114.78
7.3.330.0000.00513.13
7.3.320.0000.00613.03
7.3.310.0050.00216.33
7.3.300.0000.00716.04
7.3.290.0070.00716.18
7.3.280.0070.00716.19
7.3.270.0030.01317.40
7.3.260.0080.00816.22
7.3.250.0100.00816.37
7.3.240.0040.01916.38
7.3.230.0070.01016.56
7.3.210.0130.00316.43
7.3.200.0090.00919.39
7.3.190.0040.01716.31
7.3.180.0130.00316.24
7.3.170.0110.00516.27
7.3.160.0060.01116.44
7.3.120.0000.01314.61
7.3.110.0090.00914.61
7.3.100.0070.00714.52
7.3.90.0030.00715.00
7.3.80.0110.00414.81
7.3.70.0060.00614.58
7.3.60.0030.00914.83
7.3.50.0000.01214.67
7.3.40.0100.00314.58
7.3.30.0060.00314.72
7.3.20.0070.00716.35
7.3.10.0050.00916.52
7.3.00.0060.00516.41
7.2.330.0160.00716.55
7.2.320.0030.01316.46
7.2.310.0110.00816.42
7.2.300.0030.01316.71
7.2.290.0060.01016.61
7.2.250.0130.00714.70
7.2.240.0030.01214.95
7.2.230.0030.00614.74
7.2.220.0100.00314.73
7.2.210.0040.01114.99
7.2.200.0030.01314.83
7.2.190.0030.01014.87
7.2.180.0120.00015.02
7.2.170.0060.00614.83
7.2.130.0100.00716.84
7.2.120.0030.01016.87
7.2.110.0120.00016.76
7.2.100.0120.00316.94
7.2.90.0030.01016.92
7.2.80.0070.00716.86
7.2.70.0030.01416.66
7.2.60.0040.00816.82
7.2.50.0030.01016.66
7.2.40.0000.01616.55
7.2.30.0060.00316.69
7.2.20.0000.01316.54
7.2.10.0000.01416.77
7.2.00.0080.00717.97
7.1.330.0030.01315.59
7.1.320.0100.00315.49
7.1.310.0040.01415.56
7.1.300.0040.00815.74
7.1.290.0110.00415.68
7.1.280.0030.01015.49
7.1.270.0070.01015.69
7.1.260.0030.01315.69
7.1.250.0000.01515.68
7.1.200.0090.00015.66
7.1.100.0000.01117.85
7.1.70.0260.00016.86
7.1.60.0040.01119.61
7.1.50.0040.00716.75
7.1.00.0070.07722.42
7.0.200.0200.00314.87
7.0.140.0030.07322.04
7.0.60.0000.08719.90
7.0.50.0030.08317.81
7.0.40.0200.05320.21
7.0.30.0270.07719.99
7.0.20.0330.07320.04
7.0.10.0070.06720.33
7.0.00.0030.05020.01
5.6.280.0030.07321.09
5.6.210.0170.07020.72
5.6.200.0030.04318.12
5.6.190.0100.07320.77
5.6.180.0200.03720.62
5.6.170.0170.05020.45
5.6.160.0100.08020.38
5.6.150.0030.05318.09
5.6.140.0030.08718.08
5.6.130.0070.03718.21
5.6.120.0070.08020.86
5.6.110.0100.08021.11
5.6.100.0200.06021.10
5.6.90.0070.08321.05
5.6.80.0070.07720.50
5.6.70.3570.03320.36
5.5.350.0200.04020.38
5.5.340.0130.06017.92
5.5.330.0070.04720.47
5.5.320.0330.06020.26
5.5.310.0330.07320.23
5.5.300.0030.07717.95
5.5.290.0030.07317.88
5.5.280.0070.07020.89
5.5.270.0100.07020.86
5.5.260.0070.07320.86
5.5.250.0070.07320.61
5.5.240.0270.06720.14
5.4.450.0870.05319.26
5.4.440.0330.04719.46
5.4.430.0170.05019.40
5.4.420.0570.04719.25
5.4.410.0200.04319.28
5.4.400.0500.04018.81
5.4.390.0070.04718.81
5.4.380.0470.04718.59
5.4.370.0670.06018.49
5.4.360.0500.05318.68
5.4.350.0300.06718.63
5.4.340.0530.05718.49
5.4.320.0050.03812.45
5.4.310.0080.03512.45
5.4.300.0080.04012.45
5.4.290.0080.05112.45
5.4.280.0040.03712.35
5.4.270.0060.03412.34
5.4.260.0030.03912.34
5.4.250.0060.04412.34
5.4.240.0090.03712.34
5.4.230.0070.03912.34
5.4.220.0080.03812.34
5.4.210.0060.04212.34
5.4.200.0050.03712.34
5.4.190.0070.03712.34
5.4.180.0050.03612.33
5.4.170.0060.03512.35
5.4.160.0040.03912.34
5.4.150.0040.03712.34
5.4.140.0050.03712.02
5.4.130.0070.03912.01
5.4.120.0040.04011.96
5.4.110.0060.03411.96
5.4.100.0040.03611.96
5.4.90.0060.03511.97
5.4.80.0020.04111.96
5.4.70.0060.03311.96
5.4.60.0060.04611.96
5.4.50.0050.03511.96
5.4.40.0030.04811.95
5.4.30.0060.03511.95
5.4.20.0050.03711.95
5.4.10.0060.03411.95
5.4.00.0060.03611.43
5.3.290.0090.03912.80
5.3.280.0080.04212.71
5.3.270.0070.04212.72
5.3.260.0080.04612.72
5.3.250.0080.03512.72
5.3.240.0090.04412.72
5.3.230.0060.04312.71
5.3.220.0070.03612.68
5.3.210.0080.03712.68
5.3.200.0050.03712.68
5.3.190.0050.03812.68
5.3.180.0080.03312.68
5.3.170.0090.03812.67
5.3.160.0050.03912.67
5.3.150.0060.03612.67
5.3.140.0050.03612.66
5.3.130.0060.03912.66
5.3.120.0040.04012.66
5.3.110.0060.03812.66
5.3.100.0090.03912.12
5.3.90.0080.03512.09
5.3.80.0070.03512.08
5.3.70.0070.04112.07
5.3.60.0060.03612.07
5.3.50.0050.03712.00
5.3.40.0060.04112.00
5.3.30.0030.03811.94
5.3.20.0080.03511.71
5.3.10.0080.03311.69
5.3.00.0100.03711.68
5.2.170.0040.0329.17
5.2.160.0030.0309.17
5.2.150.0050.0299.17
5.2.140.0050.0299.17
5.2.130.0040.0299.13
5.2.120.0060.0289.13
5.2.110.0030.0369.14
5.2.100.0080.0279.13
5.2.90.0100.0289.14
5.2.80.0030.0329.13
5.2.70.0060.0299.13
5.2.60.0030.0329.08
5.2.50.0040.0309.05
5.2.40.0040.0299.03
5.2.30.0060.0289.01
5.2.20.0020.0318.99
5.2.10.0040.0288.92
5.2.00.0040.0288.77
5.1.60.0020.0258.05
5.1.50.0050.0248.05
5.1.40.0060.0238.04
5.1.30.0030.0278.39
5.1.20.0030.0328.41
5.1.10.0080.0258.13
5.1.00.0030.0278.13
5.0.50.0020.0216.61
5.0.40.0030.0206.47
5.0.30.0040.0366.28
5.0.20.0040.0216.26
5.0.10.0050.0206.23
5.0.00.0020.0326.22
4.4.90.0040.0144.78
4.4.80.0030.0144.75
4.4.70.0030.0154.75
4.4.60.0060.0124.75
4.4.50.0040.0134.77
4.4.40.0030.0244.70
4.4.30.0020.0164.76
4.4.20.0030.0154.85
4.4.10.0030.0154.85
4.4.00.0050.0224.76
4.3.110.0020.0164.67
4.3.100.0030.0144.66
4.3.90.0060.0114.63
4.3.80.0030.0234.58
4.3.70.0030.0134.63
4.3.60.0020.0144.63
4.3.50.0000.0184.62
4.3.40.0030.0234.54
4.3.30.0020.0163.28
4.3.20.0020.0163.26
4.3.10.0020.0153.21
4.3.00.0030.01316.72

preferences:
45.41 ms | 400 KiB | 5 Q