3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = NULL; $b = NULL; var_dump(isset($a)); var_dump(isset($b));

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)
8.3.40.0090.00918.59
8.3.30.0110.00318.83
8.3.20.0080.00020.04
8.3.10.0040.00421.96
8.3.00.0030.00522.44
8.2.170.0120.00322.96
8.2.160.0070.00720.74
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0070.00026.16
8.2.120.0080.00019.11
8.2.110.0060.00322.22
8.2.100.0070.00719.51
8.2.90.0060.00319.09
8.2.80.0000.00917.97
8.2.70.0060.00317.38
8.2.60.0000.00818.04
8.2.50.0060.00318.07
8.2.40.0040.00418.09
8.2.30.0040.00417.99
8.2.20.0000.00717.47
8.2.10.0040.00419.33
8.2.00.0000.00717.70
8.1.270.0040.00421.77
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0030.00623.91
8.1.230.0110.00018.97
8.1.220.0000.00817.74
8.1.210.0080.00018.77
8.1.200.0060.00317.23
8.1.190.0040.00417.18
8.1.180.0050.00518.67
8.1.170.0030.00618.46
8.1.160.0040.00421.95
8.1.150.0040.00418.51
8.1.140.0000.00717.31
8.1.130.0030.00317.69
8.1.120.0000.00817.28
8.1.110.0020.00517.43
8.1.100.0000.00717.29
8.1.90.0000.00817.43
8.1.80.0000.00717.40
8.1.70.0000.00717.34
8.1.60.0040.00417.46
8.1.50.0040.00417.46
8.1.40.0040.00417.44
8.1.30.0050.00317.59
8.1.20.0000.00717.58
8.1.10.0080.00017.43
8.1.00.0000.00917.44
8.0.300.0050.00318.77
8.0.290.0000.00817.18
8.0.280.0030.00318.37
8.0.270.0000.00717.18
8.0.260.0020.00516.66
8.0.250.0000.00716.85
8.0.240.0070.00016.79
8.0.230.0070.00016.89
8.0.220.0030.00316.86
8.0.210.0040.00416.81
8.0.200.0000.00716.94
8.0.190.0090.00016.62
8.0.180.0030.00316.80
8.0.170.0000.00716.82
8.0.160.0070.00016.82
8.0.150.0000.00716.64
8.0.140.0070.00016.75
8.0.130.0030.00313.28
8.0.120.0040.00416.81
8.0.110.0000.00716.73
8.0.100.0050.00216.81
8.0.90.0040.00416.81
8.0.80.0030.01316.88
8.0.70.0040.00416.93
8.0.60.0040.00416.78
8.0.50.0040.00416.72
8.0.30.0090.01517.07
8.0.20.0100.00917.40
8.0.10.0000.00716.91
8.0.00.0110.00716.65
7.4.330.0050.00015.14
7.4.320.0000.00616.44
7.4.300.0060.00016.45
7.4.290.0030.00316.43
7.4.280.0070.00016.56
7.4.270.0030.00316.41
7.4.260.0000.00816.30
7.4.250.0030.00516.51
7.4.240.0030.00416.46
7.4.230.0070.00016.24
7.4.220.0110.00616.44
7.4.210.0050.01116.46
7.4.200.0040.00416.61
7.4.190.0030.00316.55
7.4.160.0050.01016.39
7.4.150.0120.00817.40
7.4.140.0070.01017.86
7.4.130.0070.00916.35
7.4.120.0140.00316.40
7.4.110.0100.00716.49
7.4.100.0060.01216.40
7.4.90.0150.00616.34
7.4.80.0100.01019.39
7.4.70.0120.00916.36
7.4.60.0110.00516.34
7.4.50.0000.00716.36
7.4.40.0030.00722.77
7.4.30.0150.00016.39
7.4.00.0060.00914.66
7.3.330.0060.00012.88
7.3.320.0030.00313.04
7.3.310.0000.00715.98
7.3.300.0030.00316.11
7.3.290.0060.00816.12
7.3.280.0080.00816.11
7.3.270.0130.00417.40
7.3.260.0150.00316.41
7.3.250.0020.01516.29
7.3.240.0030.01416.53
7.3.230.0110.00616.39
7.3.210.0040.01316.44
7.3.200.0100.00619.39
7.3.190.0120.00916.43
7.3.180.0080.00716.11
7.3.170.0060.00916.30
7.3.160.0130.00916.15
7.3.120.0070.01014.92
7.2.330.0100.01016.25
7.2.320.0140.00316.18
7.2.310.0110.00616.20
7.2.300.0030.01616.67
7.2.290.0150.00616.42
7.2.00.0090.00319.12
7.1.100.0070.00318.11
7.1.70.0000.00717.07
7.1.60.0040.01919.82
7.1.50.0240.01434.48
7.1.00.0070.07322.43
7.0.200.0040.00416.70
7.0.140.0030.06021.97
7.0.60.0170.08319.79
7.0.50.0130.06717.75
7.0.40.0030.06319.98
7.0.30.0270.06020.00
7.0.20.0170.04320.30
7.0.10.0330.05720.01
7.0.00.0100.03720.16
5.6.280.0000.07720.86
5.6.210.0030.04020.54
5.6.200.0000.08318.08
5.6.190.0130.05020.41
5.6.180.0200.05020.61
5.6.170.0300.06720.41
5.6.160.0070.05020.33
5.6.150.0100.06718.11
5.6.140.0000.05018.16
5.6.130.0130.08018.18
5.6.120.0070.08721.00
5.6.110.0130.05021.13
5.6.100.0030.06720.92
5.6.90.0030.09320.96
5.6.80.0130.07720.39
5.5.350.0230.07320.29
5.5.340.0070.08318.01
5.5.330.0070.04720.13
5.5.320.0200.04020.34
5.5.310.0270.06020.31
5.5.300.0000.06717.88
5.5.290.0030.04017.95
5.5.280.0000.04720.88
5.5.270.0070.07720.86
5.5.260.0170.06320.66
5.5.250.0100.07720.61
5.5.240.0130.08320.25
5.4.450.0770.06019.11
5.4.440.1000.05019.43
5.4.430.0100.05719.50
5.4.420.0100.05319.62
5.4.410.0070.06018.73
5.4.400.0230.05718.64
5.4.390.0430.04718.55
5.4.380.0170.05718.59
5.4.370.0100.04018.51
5.4.360.0130.05018.65
5.4.350.0060.03811.97
5.4.340.0090.03811.97
5.4.320.0070.03612.45
5.4.310.0070.04512.45
5.4.300.0050.03812.45
5.4.290.0070.04112.45
5.4.280.0050.03612.34
5.4.270.0050.04312.35
5.4.260.0230.04718.73
5.4.250.0170.07018.79
5.4.240.0200.07018.79
5.4.230.0100.04718.70
5.4.220.0170.05018.73
5.4.210.0100.07718.69
5.4.200.0070.05318.70
5.4.190.0230.05018.77
5.4.180.0070.05718.74
5.4.170.0100.05019.00
5.4.160.0030.05318.68
5.4.150.0200.06018.82
5.4.140.0130.06016.25
5.4.130.0170.06316.25
5.4.120.0100.04716.25
5.4.110.0070.06016.38
5.4.100.0070.05016.49
5.4.90.0070.04716.25
5.4.80.0030.06316.14
5.4.70.0100.04716.46
5.4.60.0200.06016.41
5.4.50.0200.06316.26
5.4.40.0200.05316.34
5.4.30.0030.06016.36
5.4.20.0200.04016.28
5.4.10.0130.04316.47
5.4.00.0070.07315.71
5.3.290.0080.04312.80
5.3.280.0070.05314.61
5.3.270.0100.06314.37
5.3.260.0170.05714.62
5.3.250.0100.05314.61
5.3.240.0130.05314.46
5.3.230.0070.05714.68
5.3.220.0130.04714.62
5.3.210.0030.05714.42
5.3.200.0030.05314.45
5.3.190.0030.05714.57
5.3.180.0030.05314.56
5.3.170.0070.05014.46
5.3.160.0130.04314.61
5.3.150.0070.07714.57
5.3.140.0100.06014.43
5.3.130.0070.07014.24
5.3.120.0130.07014.59
5.3.110.0200.04014.70
5.3.100.0070.05713.91
5.3.90.0100.05313.85
5.3.80.0200.04713.79
5.3.70.0070.04713.90
5.3.60.0100.05013.88
5.3.50.0070.05014.10
5.3.40.0070.05013.83
5.3.30.0130.04313.74
5.3.20.0100.04713.60
5.3.10.0100.05313.51
5.3.00.0170.04013.55
5.2.170.0130.04711.14
5.2.160.0030.04011.16
5.2.150.0070.06011.25
5.2.140.0100.04011.14
5.2.130.0030.05311.22
5.2.120.0100.03311.11
5.2.110.0070.03711.10
5.2.100.0100.04011.11
5.2.90.0070.05711.03
5.2.80.0100.03711.23
5.2.70.0070.05711.10
5.2.60.0030.06311.05
5.2.50.0000.04710.78
5.2.40.0200.04011.00
5.2.30.0070.03710.97
5.2.20.0030.04010.85
5.2.10.0100.04310.91
5.2.00.0100.05310.69
5.1.60.0000.0379.95
5.1.50.0070.0339.76
5.1.40.0000.0439.93
5.1.30.0100.03010.41
5.1.20.0100.03010.40
5.1.10.0000.0539.97
5.1.00.0100.04010.20
5.0.50.0100.0238.56
5.0.40.0100.0308.29
5.0.30.0070.0578.45
5.0.20.0000.0308.24
5.0.10.0070.0238.31
5.0.00.0100.0378.21
4.4.90.0030.0207.02
4.4.80.0000.0237.02
4.4.70.0100.0207.02
4.4.60.0100.0177.02
4.4.50.0070.0237.02
4.4.40.0000.0377.02
4.4.30.0070.0177.02
4.4.20.0100.0137.02
4.4.10.0000.0277.02
4.4.00.0000.0507.02
4.3.110.0000.0237.02
4.3.100.0130.0237.02
4.3.90.0030.0306.95
4.3.80.0070.0336.95
4.3.70.0100.0236.95
4.3.60.0030.0276.95
4.3.50.0130.0206.95
4.3.40.0000.0436.95
4.3.30.0070.0276.95
4.3.20.0000.0236.95
4.3.10.0030.0206.95
4.3.00.0270.01714.49

preferences:
41.83 ms | 400 KiB | 5 Q