3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A {} class B extends A{} class C extends B{} $b = 'B'; var_dump(is_subclass_of('A', 'A'), is_subclass_of('B', 'A'), is_subclass_of($b, 'A')); var_dump(is_a('A', 'A', true), is_a('B', 'A', true), is_a($b, 'A', true)); $className = 'C'; $parentClass = $className; while($_parentClass = get_parent_class($parentClass)) $parentClass = $_parentClass;

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)
8.3.60.0110.00718.40
8.3.50.0160.00021.99
8.3.40.0110.00318.60
8.3.30.0070.00718.96
8.3.20.0080.00020.20
8.3.10.0080.00023.66
8.3.00.0040.00422.46
8.2.180.0090.00916.63
8.2.170.0100.00722.96
8.2.160.0160.00321.99
8.2.150.0090.00024.18
8.2.140.0090.00024.66
8.2.130.0000.00826.16
8.2.120.0080.00019.36
8.2.110.0090.00022.21
8.2.100.0060.00617.78
8.2.90.0000.00719.09
8.2.80.0080.00017.97
8.2.70.0030.00517.50
8.2.60.0000.00917.80
8.2.50.0030.00618.07
8.2.40.0000.01118.09
8.2.30.0040.00417.97
8.2.20.0040.00417.59
8.2.10.0000.00717.73
8.2.00.0040.00417.73
8.1.280.0100.00725.92
8.1.270.0060.00323.96
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0060.00323.83
8.1.230.0080.00319.00
8.1.220.0050.00317.74
8.1.210.0050.00318.77
8.1.200.0060.00317.35
8.1.190.0080.00017.40
8.1.180.0050.00318.10
8.1.170.0000.00918.59
8.1.160.0000.00822.05
8.1.150.0030.00918.62
8.1.140.0080.00017.37
8.1.130.0050.00217.88
8.1.120.0030.00317.34
8.1.110.0000.00817.26
8.1.100.0050.00217.44
8.1.90.0000.00717.40
8.1.80.0040.00417.41
8.1.70.0040.00417.32
8.1.60.0040.00417.48
8.1.50.0040.00417.50
8.1.40.0030.00617.43
8.1.30.0040.00417.57
8.1.20.0060.00317.59
8.1.10.0000.00717.37
8.1.00.0080.00017.40
8.0.300.0070.00018.77
8.0.290.0040.00417.18
8.0.280.0070.00018.28
8.0.270.0000.00717.07
8.0.260.0040.00416.67
8.0.250.0000.00716.85
8.0.240.0100.00016.82
8.0.230.0000.00716.77
8.0.220.0000.00716.84
8.0.210.0080.00016.74
8.0.200.0000.00716.89
8.0.190.0040.00416.75
8.0.180.0040.00416.77
8.0.170.0000.00816.87
8.0.160.0040.00416.82
8.0.150.0000.00716.77
8.0.140.0070.00016.79
8.0.130.0000.00813.29
8.0.120.0020.00516.78
8.0.110.0000.00816.72
8.0.100.0040.00416.88
8.0.90.0040.00416.87
8.0.80.0110.00316.85
8.0.70.0000.00716.65
8.0.60.0040.00416.61
8.0.50.0050.00216.77
8.0.30.0110.01017.15
8.0.20.0080.01017.40
8.0.10.0000.00816.86
8.0.00.0160.00916.69
7.4.330.0000.00515.03
7.4.320.0000.00616.48
7.4.300.0050.00216.48
7.4.290.0000.00716.45
7.4.280.0030.00316.52
7.4.270.0110.00016.49
7.4.260.0000.00716.39
7.4.250.0000.00916.41
7.4.240.0020.00516.47
7.4.230.0030.00316.34
7.4.220.0150.00316.38
7.4.210.0050.01016.56
7.4.200.0050.00316.61
7.4.190.0030.00316.49
7.4.160.0060.00916.53
7.4.150.0060.01217.40
7.4.140.0080.01017.86
7.4.130.0110.00916.37
7.4.120.0110.00616.40
7.4.110.0130.00316.44
7.4.100.0100.00716.36
7.4.90.0120.00616.23
7.4.80.0130.00916.24
7.4.70.0040.01416.48
7.4.60.0160.00616.25
7.4.50.0000.00416.50
7.4.40.0070.01022.77
7.4.30.0110.01116.58
7.4.00.0120.00614.72
7.3.330.0060.00013.23
7.3.320.0050.00013.04
7.3.310.0040.00416.27
7.3.300.0000.00716.08
7.3.290.0030.01016.22
7.3.280.0110.00716.20
7.3.270.0100.00717.40
7.3.260.0130.00416.34
7.3.250.0080.00916.44
7.3.240.0070.01016.26
7.3.230.0060.01216.39
7.3.210.0060.01216.55
7.3.200.0160.00619.39
7.3.190.0100.00716.29
7.3.180.0090.00916.16
7.3.170.0090.01216.46
7.3.160.0140.00316.45
7.3.120.0060.01014.78
7.3.10.0000.01416.57
7.3.00.0060.00916.52
7.2.330.0170.00016.71
7.2.320.0090.00916.63
7.2.310.0090.00916.61
7.2.300.0040.01216.57
7.2.290.0120.00616.62
7.2.130.0060.00616.85
7.2.120.0100.00716.95
7.2.110.0030.00616.77
7.2.100.0040.00716.83
7.2.90.0120.00316.82
7.2.80.0040.00816.85
7.2.70.0000.01416.89
7.2.60.0020.01216.70
7.2.50.0040.00716.97
7.2.40.0060.00916.67
7.2.30.0080.00616.75
7.2.20.0040.01216.88
7.2.10.0060.00316.60
7.2.00.0050.00917.82
7.1.250.0040.00415.88
7.1.200.0100.00315.78
7.1.100.0060.00317.96
7.1.70.0050.00516.89
7.1.60.0070.01319.24
7.1.50.0030.01516.89
7.1.00.0000.08022.42
7.0.200.0030.00916.73
7.0.140.0170.06322.00
7.0.100.0170.07719.95
7.0.90.0270.06720.16
7.0.80.0070.08320.16
7.0.70.0200.07019.96
7.0.60.0070.05720.00
7.0.50.0070.07720.42
7.0.40.0130.07320.03
7.0.30.0070.05020.15
7.0.20.0130.07719.99
7.0.10.0130.07720.02
7.0.00.0170.08020.09
5.6.280.0030.07320.92
5.6.250.0070.08020.48
5.6.240.0100.08020.71
5.6.230.0100.08020.57
5.6.220.0070.07720.66
5.6.210.0030.09320.65
5.6.200.0130.08020.95
5.6.190.0170.05721.14
5.6.180.0070.08020.95
5.6.170.0030.08721.01
5.6.160.0130.07321.01
5.6.150.0170.07321.13
5.6.140.0070.08021.00
5.6.130.0070.08021.12
5.6.120.0100.08021.08
5.6.110.0070.08720.92
5.6.100.0100.07321.04
5.6.90.0130.07721.00
5.6.80.0130.06020.32
5.6.70.0170.07020.39
5.6.60.0070.04720.48
5.6.50.0130.07020.33
5.6.40.0130.04720.41
5.6.30.0100.07720.38
5.6.20.0070.08020.30
5.6.10.0030.08020.37
5.6.00.0030.08320.30
5.5.380.0070.07720.37
5.5.370.0000.08720.54
5.5.360.0130.06020.41
5.5.350.0130.06720.44
5.5.340.0130.07020.80
5.5.330.0200.07020.91
5.5.320.0170.07320.78
5.5.310.0170.06720.86
5.5.300.0070.08320.88
5.5.290.0070.08020.76
5.5.280.0070.05720.86
5.5.270.0070.07020.73
5.5.260.0030.08320.88
5.5.250.0170.06720.64
5.5.240.0100.07320.22
5.5.230.0070.08020.18
5.5.220.0070.08020.20
5.5.210.0070.08020.13
5.5.200.0030.08020.13
5.5.190.0130.06720.08
5.5.180.0030.08320.25
5.5.160.0130.04020.14
5.5.150.0070.08320.27
5.5.140.0170.06720.14
5.5.130.0000.05720.08
5.5.120.0070.05720.26
5.5.110.0030.03720.08
5.5.100.0030.04019.95
5.5.90.0070.04719.96
5.5.80.0070.04019.94
5.5.70.0030.04320.14
5.5.60.0030.05020.03
5.5.50.0000.05320.05
5.5.40.0030.03720.00
5.5.30.0070.03320.09
5.5.20.0130.05320.15
5.5.10.0030.04020.12
5.5.00.0030.04019.95
5.4.450.0100.07019.28
5.4.440.0070.08019.49
5.4.430.0070.08019.44
5.4.420.0000.09019.19
5.4.410.0070.07019.07
5.4.400.0070.07019.10
5.4.390.0070.06318.95
5.4.380.0030.07719.11
5.4.370.0100.07719.23
5.4.360.0130.07719.09
5.4.350.0070.07019.18
5.4.340.0030.05719.11
5.4.320.0030.07319.05
5.4.310.0070.04718.87
5.4.300.0170.06318.90
5.4.290.0030.06019.04
5.4.280.0070.07319.16
5.4.270.0100.03719.21
5.4.260.0030.04019.16
5.4.250.0030.03719.04
5.4.240.0000.04018.89
5.4.230.0000.04019.09
5.4.220.0100.03718.86
5.4.210.0030.05319.13
5.4.200.0130.02719.02
5.4.190.0000.05019.11
5.4.180.0070.07719.13
5.4.170.0030.05719.14
5.4.160.0030.08018.83
5.4.150.0030.07019.02
5.4.140.0100.06016.49
5.4.130.0000.03316.39
5.4.120.0030.03716.48
5.4.110.0030.06016.33
5.4.100.0070.03016.49
5.4.90.0000.03716.33
5.4.80.0070.04716.46
5.4.70.0070.02716.51
5.4.60.0100.05016.49
5.4.50.0130.04316.49
5.4.40.0000.03716.36
5.4.30.0030.03716.39
5.4.20.0030.05716.40
5.4.10.0070.05016.43
5.4.00.0030.04315.71
5.3.290.0070.06714.61
5.3.280.0030.05314.58
5.3.270.0000.06314.63
5.3.260.0000.04314.54
5.3.250.0100.06714.56
5.3.240.0070.05014.66
5.3.230.0030.05014.73
5.3.220.0000.04014.50
5.3.210.0000.05314.55
5.3.200.0000.04014.49
5.3.190.0000.04314.66
5.3.180.0030.03714.48
5.3.170.0130.02714.66
5.3.160.0070.05014.63
5.3.150.0030.03314.67
5.3.140.0000.04014.49
5.3.130.0030.03714.55
5.3.120.0000.04014.57
5.3.110.0130.05014.57
5.3.100.0030.03714.05
5.3.90.0000.04714.00
5.3.80.0000.05014.11
5.3.70.0030.04314.11
5.3.60.0070.04013.92
5.3.50.0070.06314.01
5.3.40.0100.03013.96
5.3.30.0030.04713.89
5.3.20.0070.03713.57
5.3.10.0000.06713.68
5.3.00.0070.03013.77
5.2.170.0000.03311.17
5.2.160.0000.03011.07
5.2.150.0030.03011.16
5.2.140.0000.03011.20
5.2.130.0000.05710.99
5.2.120.0070.03311.08
5.2.110.0000.03011.21
5.2.100.0000.02711.01
5.2.90.0030.03011.09
5.2.80.0000.04011.02
5.2.70.0030.02711.12
5.2.60.0030.02710.93
5.2.50.0000.03011.13
5.2.40.0000.03011.00
5.2.30.0030.06010.86
5.2.20.0030.03010.93
5.2.10.0000.03010.98
5.2.00.0070.02310.79
5.1.60.0030.02310.09
5.1.50.0070.0579.83
5.1.40.0000.0609.81
5.1.30.0030.05710.27
5.1.20.0000.05710.21
5.1.10.0030.05710.08
5.1.00.0030.0539.90
5.0.50.0030.0438.43
5.0.40.0030.0438.48
5.0.30.0030.0608.17
5.0.20.0030.0338.19
5.0.10.0070.0338.24
5.0.00.0000.0678.28
4.4.90.0030.0138.17
4.4.80.0030.0238.17
4.4.70.0000.0138.17
4.4.60.0070.0108.17
4.4.50.0000.0138.17
4.4.40.0030.0538.17
4.4.30.0030.0338.17
4.4.20.0000.0378.17
4.4.10.0030.0338.17
4.4.00.0070.0508.17
4.3.110.0000.0378.17
4.3.100.0030.0338.17
4.3.90.0030.0178.17
4.3.80.0070.0508.17
4.3.70.0030.0338.17
4.3.60.0000.0378.17
4.3.50.0030.0338.17
4.3.40.0000.0538.17
4.3.30.0030.0338.17
4.3.20.0070.0278.17
4.3.10.0000.0378.17
4.3.00.0030.0208.17

preferences:
38.16 ms | 401 KiB | 5 Q