3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = array(); var_dump(isset($foo['a'])); var_dump(isset($foo['a']['b'])); var_dump(isset($foo['a']->bar['b'])); var_dump(isset($bar['a'])); var_dump(isset($bar['a']['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)
8.3.60.0140.00718.43
8.3.50.0140.00521.98
8.3.40.0160.00018.85
8.3.30.0150.00018.54
8.3.20.0040.00418.60
8.3.10.0160.00320.66
8.3.00.0110.00019.38
8.2.180.0070.00716.50
8.2.170.0070.01122.96
8.2.160.0060.01322.16
8.2.150.0040.00425.66
8.2.140.0060.00324.66
8.2.130.0000.00826.16
8.2.120.0070.00019.96
8.2.110.0030.00621.00
8.2.100.0070.00417.84
8.2.90.0040.00419.07
8.2.80.0070.00017.97
8.2.70.0040.00417.46
8.2.60.0050.00218.04
8.2.50.0040.00418.07
8.2.40.0040.00418.16
8.2.30.0000.00719.84
8.2.20.0060.00317.56
8.2.10.0040.00417.68
8.2.00.0030.00517.66
8.1.280.0110.00425.92
8.1.270.0040.00423.99
8.1.260.0030.00626.35
8.1.250.0040.00428.09
8.1.240.0160.00022.45
8.1.230.0070.00421.10
8.1.220.0000.00818.77
8.1.210.0000.00718.91
8.1.200.0030.00617.23
8.1.190.0040.00417.41
8.1.180.0040.00418.10
8.1.170.0080.00018.56
8.1.160.0000.00718.71
8.1.150.0000.00718.54
8.1.140.0040.00417.29
8.1.130.0070.00017.73
8.1.120.0000.00717.38
8.1.110.0020.00517.36
8.1.100.0040.00417.34
8.1.90.0020.00517.28
8.1.80.0050.00317.40
8.1.70.0030.00317.27
8.1.60.0000.00717.54
8.1.50.0000.00817.40
8.1.40.0020.00517.41
8.1.30.0000.00717.46
8.1.20.0000.00917.48
8.1.10.0000.00817.41
8.1.00.0000.00717.36
8.0.300.0030.00319.92
8.0.290.0070.00016.58
8.0.280.0000.00718.29
8.0.270.0000.00717.20
8.0.260.0030.00316.76
8.0.250.0040.00416.75
8.0.240.0080.00016.91
8.0.230.0000.00716.82
8.0.220.0070.00016.72
8.0.210.0000.00816.84
8.0.200.0000.00616.90
8.0.190.0030.00516.71
8.0.180.0030.00516.83
8.0.170.0030.00616.80
8.0.160.0030.00316.75
8.0.150.0080.00016.69
8.0.140.0120.00016.73
8.0.130.0050.00013.34
8.0.120.0080.00016.76
8.0.110.0040.00416.61
8.0.100.0030.00516.80
8.0.90.0040.00416.78
8.0.80.0120.00416.70
8.0.70.0030.00316.81
8.0.60.0000.00716.80
8.0.50.0000.00816.71
8.0.30.0130.00616.90
8.0.20.0080.01317.40
8.0.10.0040.00416.83
8.0.00.0040.01316.58
7.4.330.0000.00514.77
7.4.320.0030.00316.51
7.4.300.0000.00616.43
7.4.290.0030.00316.55
7.4.280.0000.00716.48
7.4.270.0000.00616.51
7.4.260.0000.00713.23
7.4.250.0040.00416.40
7.4.240.0000.00816.60
7.4.230.0070.00016.68
7.4.220.0040.01516.50
7.4.210.0050.01216.57
7.4.200.0030.00316.62
7.4.190.0030.00316.65
7.4.160.0070.00716.53
7.4.150.0100.01017.40
7.4.140.0100.00717.86
7.4.130.0080.00816.54
7.4.120.0100.00716.50
7.4.110.0060.01116.63
7.4.100.0170.00416.46
7.4.90.0060.01016.48
7.4.80.0070.01019.04
7.4.70.0130.00316.55
7.4.60.0060.01016.57
7.4.50.0000.00916.14
7.4.40.0030.01322.27
7.4.30.0040.01216.48
7.4.00.0030.01314.91
7.3.330.0000.00613.24
7.3.320.0000.00513.14
7.3.310.0070.00016.19
7.3.300.0030.00316.10
7.3.290.0070.01016.29
7.3.280.0090.00616.27
7.3.270.0070.01017.40
7.3.260.0100.01318.24
7.3.250.0110.00816.26
7.3.240.0090.00616.45
7.3.230.0150.00316.51
7.3.210.0070.01016.13
7.3.200.0080.01519.39
7.3.190.0080.00816.29
7.3.180.0060.00916.47
7.3.170.0120.00416.30
7.3.160.0000.01516.34
7.3.120.0070.00714.84
7.2.330.0090.00916.54
7.2.320.0100.01316.74
7.2.310.0120.01216.44
7.2.300.0030.01316.37
7.2.290.0120.00916.50
7.2.00.0070.00719.18
7.1.100.0060.01018.18
7.1.70.0040.00416.95
7.1.60.0000.01019.40
7.1.50.0060.01616.95
7.1.00.0000.07022.44
7.0.200.0050.00316.66
7.0.140.0070.07022.10
7.0.60.0000.05019.94
7.0.50.0030.05017.88
7.0.40.0200.04719.95
7.0.30.0300.07720.05
7.0.20.0300.07720.20
7.0.10.0370.05020.08
7.0.00.0300.03720.20
5.6.280.0000.07721.14
5.6.210.0070.08320.71
5.6.200.0030.08318.16
5.6.190.0300.04020.69
5.6.180.0230.04320.41
5.6.170.0370.07020.39
5.6.160.0300.05320.26
5.6.150.0670.05020.11
5.6.140.0270.04320.40
5.6.130.0300.06320.38
5.6.120.0400.03320.18
5.6.110.0300.06320.10
5.6.100.0330.08020.10
5.6.90.0270.08720.25
5.6.80.0270.08019.73
5.6.70.0370.07019.71
5.6.60.0330.07319.80
5.6.50.0270.07319.73
5.6.40.0330.07319.54
5.6.30.0400.07719.73
5.6.20.0230.05319.77
5.6.10.0300.05319.75
5.6.00.0270.04019.45
5.5.350.0200.04020.46
5.5.340.0030.08318.02
5.5.330.0270.04020.29
5.5.320.0330.07720.47
5.5.310.0300.07020.47
5.5.300.0270.05720.12
5.5.290.0370.07720.07
5.5.280.0430.06719.91
5.5.270.0230.09020.24
5.5.260.0300.08719.90
5.5.250.0300.06020.05
5.5.240.0330.07719.36
5.5.230.0300.08719.61
5.5.220.0300.04319.36
5.5.210.0470.06019.61
5.5.200.0300.07019.61
5.5.190.0330.07019.28
5.5.180.0270.07719.59
5.5.160.0300.07719.47
5.5.150.0330.06719.48
5.5.140.0370.06719.43
5.5.130.0330.07019.55
5.5.120.0230.04319.52
5.5.110.0330.06719.32
5.5.100.0300.05719.24
5.5.90.0330.06719.32
5.5.80.0330.07319.41
5.5.70.0330.07319.21
5.5.60.0300.07319.23
5.5.50.0330.06719.36
5.5.40.0300.07019.47
5.5.30.0330.05319.39
5.5.20.0330.03019.43
5.5.10.0300.03719.54
5.5.00.0400.06719.27
5.4.450.0300.07019.14
5.4.440.0330.07319.14
5.4.430.0330.07019.50
5.4.420.0270.06319.48
5.4.410.0300.05319.38
5.4.400.0370.05318.93
5.4.390.0330.04718.91
5.4.380.0300.07018.79
5.4.370.0370.03718.97
5.4.360.0270.07719.09
5.4.350.0330.03319.18
5.4.340.0330.03719.18
5.4.320.0270.05719.18
5.4.310.0270.07718.92
5.4.300.0370.04019.08
5.4.290.0330.06718.79
5.4.280.0300.06019.11
5.4.270.0300.07318.91
5.4.260.0300.05318.92
5.4.250.0300.04019.14
5.4.240.0400.06018.78
5.4.230.0370.06318.78
5.4.220.0270.07018.80
5.4.210.0400.06019.17
5.4.200.0300.05718.81
5.4.190.0330.03018.99
5.4.180.0300.07019.11
5.4.170.0300.07719.11
5.4.160.0300.06319.12
5.4.150.0330.06019.16
5.4.140.0370.06016.25
5.4.130.0370.05716.21
5.4.120.0400.06016.20
5.4.110.0430.03716.39
5.4.100.0370.05016.36
5.4.90.0300.06716.20
5.4.80.0330.04716.66
5.4.70.0330.04716.57
5.4.60.0300.07016.39
5.4.50.0270.06016.24
5.4.40.0370.06716.33
5.4.30.0400.06316.34
5.4.20.0270.07016.12
5.4.10.0330.04716.21
5.4.00.0370.04015.92
5.3.290.0300.03314.60
5.3.280.0300.07014.52
5.3.270.0300.05014.54
5.3.260.0430.05014.61
5.3.250.0330.05014.61
5.3.240.0330.06714.54
5.3.230.0270.04714.47
5.3.220.0400.06714.49
5.3.210.0330.06014.54
5.3.200.0300.07314.49
5.3.190.0270.04014.35
5.3.180.0400.06014.53
5.3.170.0230.05314.49
5.3.160.0330.07014.48
5.3.150.0370.06714.52
5.3.140.0300.06714.49
5.3.130.0230.05014.44
5.3.120.0300.05314.46
5.3.110.0400.06314.63
5.3.100.0270.03713.96
5.3.90.0300.07013.95
5.3.80.0330.04013.86
5.3.70.0400.04713.96
5.3.60.0370.04013.84
5.3.50.0330.07013.79
5.3.40.0270.07713.73
5.3.30.0330.06313.85
5.3.20.0230.04313.78
5.3.10.0300.05013.62
5.3.00.0300.04013.46
5.2.170.0230.03712.68
5.2.160.0230.06012.68
5.2.150.0300.06012.68
5.2.140.0300.05012.68
5.2.130.0330.04712.68
5.2.120.0230.04312.68
5.2.110.0330.03312.68
5.2.100.0230.04312.68
5.2.90.0170.03312.68
5.2.80.0230.02312.68
5.2.70.0130.03012.68
5.2.60.0130.03712.68
5.2.50.0300.01712.68
5.2.40.0100.03312.68
5.2.30.0130.03012.68
5.2.20.0130.03012.68
5.2.10.0130.02712.68
5.2.00.0100.03712.68
5.1.60.0100.02712.68
5.1.50.0100.02312.68
5.1.40.0200.01712.68
5.1.30.0100.02712.68
5.1.20.0130.02712.68
5.1.10.0100.02712.68
5.1.00.0100.02712.68
5.0.50.0030.02312.68
5.0.40.0100.01312.68
5.0.30.0070.03012.68
5.0.20.0100.01712.68
5.0.10.0100.01712.68
5.0.00.0070.03012.68
4.4.90.0070.01712.68
4.4.80.0100.01312.68
4.4.70.0030.01712.68
4.4.60.0030.01712.68
4.4.50.0070.01312.68
4.4.40.0070.02312.68
4.4.30.0130.00712.68
4.4.20.0030.01712.68
4.4.10.0070.01312.68
4.4.00.0070.02312.68
4.3.110.0070.01312.68
4.3.100.0070.01712.68
4.3.90.0070.01312.68
4.3.80.0100.02012.68
4.3.70.0100.01012.68
4.3.60.0070.01312.68
4.3.50.0100.01312.68
4.3.40.0070.02312.68
4.3.30.0030.01312.68
4.3.20.0030.02012.68
4.3.10.0030.01712.68
4.3.00.0070.01312.68

preferences:
41.31 ms | 401 KiB | 5 Q