3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a() { function b() { } return "Defining b()"; } var_dump(function_exists('b'), a(), function_exists('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)
8.3.60.0140.00316.50
8.3.50.0110.00822.05
8.3.40.0060.01218.69
8.3.30.0070.00718.46
8.3.20.0060.00920.04
8.3.10.0050.00320.36
8.3.00.0050.00320.58
8.2.180.0110.01125.92
8.2.170.0070.00718.78
8.2.160.0140.00022.96
8.2.150.0030.00625.66
8.2.140.0000.00824.66
8.2.130.0090.00019.13
8.2.120.0040.00426.35
8.2.110.0090.00020.53
8.2.100.0040.00717.66
8.2.90.0040.00417.50
8.2.80.0000.00818.75
8.2.70.0060.00317.50
8.2.60.0080.00017.38
8.2.50.0030.00617.50
8.2.40.0040.00417.80
8.2.30.0040.00419.24
8.2.20.0000.00817.49
8.2.10.0050.00318.00
8.2.00.0000.00717.85
8.1.280.0110.00725.92
8.1.270.0000.00923.99
8.1.260.0060.00328.09
8.1.250.0040.00428.09
8.1.240.0070.01022.07
8.1.230.0070.00423.88
8.1.220.0090.00017.74
8.1.210.0040.00418.77
8.1.200.0040.00417.23
8.1.190.0050.00816.75
8.1.180.0030.00618.10
8.1.170.0000.00817.62
8.1.160.0000.00722.52
8.1.150.0050.00218.83
8.1.140.0080.00019.50
8.1.130.0080.00017.54
8.1.120.0000.00817.45
8.1.110.0040.00417.27
8.1.100.0040.00417.44
8.1.90.0030.00617.25
8.1.80.0030.00617.34
8.1.70.0030.00317.39
8.1.60.0000.00817.41
8.1.50.0040.00417.28
8.1.40.0040.00417.42
8.1.30.0000.00817.46
8.1.20.0030.00617.49
8.1.10.0000.00717.34
8.1.00.0080.00017.24
8.0.300.0040.00418.77
8.0.290.0080.00016.75
8.0.280.0030.00318.36
8.0.270.0030.00316.80
8.0.260.0040.00417.16
8.0.250.0070.00016.77
8.0.240.0030.00716.89
8.0.230.0030.00316.77
8.0.220.0000.00716.82
8.0.210.0000.00716.82
8.0.200.0040.00416.85
8.0.190.0080.00016.76
8.0.180.0050.00316.91
8.0.170.0000.00716.75
8.0.160.0040.00416.88
8.0.150.0000.00716.75
8.0.140.0000.00716.78
8.0.130.0050.00013.31
8.0.120.0040.00416.72
8.0.110.0040.00416.83
8.0.100.0000.00716.70
8.0.90.0040.00416.80
8.0.80.0030.01616.79
8.0.70.0040.00416.68
8.0.60.0040.00416.86
8.0.50.0000.00816.80
8.0.30.0050.01416.96
8.0.20.0120.00717.40
8.0.10.0030.00316.92
8.0.00.0120.00816.73
7.4.330.0000.00515.08
7.4.320.0030.00316.45
7.4.300.0030.00316.49
7.4.290.0000.00716.51
7.4.280.0000.00816.39
7.4.270.0000.00616.50
7.4.260.0000.00716.31
7.4.250.0000.00716.39
7.4.240.0000.00816.38
7.4.230.0030.00316.47
7.4.220.0100.00716.55
7.4.210.0080.00516.56
7.4.200.0080.00016.55
7.4.160.0040.01116.27
7.4.150.0150.00617.40
7.4.140.0140.01017.86
7.4.130.0130.00716.56
7.4.120.0120.00616.53
7.4.110.0030.01516.48
7.4.100.0140.00416.23
7.4.90.0070.01016.46
7.4.80.0120.00319.39
7.4.70.0070.01016.55
7.4.60.0080.00816.48
7.4.50.0070.01016.63
7.4.40.0030.01416.49
7.4.30.0060.01716.54
7.4.00.0120.00314.75
7.3.330.0000.00513.08
7.3.320.0050.00013.22
7.3.310.0030.00316.18
7.3.300.0000.00716.23
7.3.290.0060.00916.27
7.3.280.0100.00816.26
7.3.270.0180.00317.40
7.3.260.0180.00516.40
7.3.250.0100.00616.34
7.3.240.0140.00316.34
7.3.230.0000.01616.39
7.3.210.0130.01016.34
7.3.200.0160.00616.31
7.3.190.0110.00516.43
7.3.180.0100.00716.21
7.3.170.0130.00316.40
7.3.160.0140.00516.28
7.2.330.0110.00716.38
7.2.320.0070.01716.80
7.2.310.0070.01116.46
7.2.300.0100.01316.59
7.2.290.0170.00016.55
7.2.60.0170.00316.75
7.2.50.0000.01316.60
7.1.200.0030.01215.66
7.1.100.0000.01118.06
7.1.70.0000.00717.09
7.1.60.0070.01719.27
7.1.00.0100.07022.51
7.0.200.0000.00716.30
7.0.60.0070.03721.72
7.0.50.0070.03717.88
7.0.40.0030.04319.96
7.0.30.0130.09020.21
7.0.20.0300.07320.30
7.0.10.0070.06720.24
7.0.00.0030.07020.09
5.6.280.0030.09721.08
5.6.210.0200.06720.44
5.6.200.0000.05318.18
5.6.190.0030.04320.51
5.6.180.0130.04320.46
5.6.170.0170.04320.71
5.6.160.0100.05320.39
5.6.150.0000.08318.14
5.6.140.0070.08018.19
5.6.130.0070.08018.18
5.6.120.0100.07021.00
5.6.110.0070.07721.01
5.6.100.0070.04721.13
5.6.90.0070.08320.98
5.6.80.0030.04320.39
5.5.350.0300.06320.38
5.5.340.0070.07317.94
5.5.330.0070.07320.43
5.5.320.0500.03720.43
5.5.310.0370.07720.30
5.5.300.0100.04018.08
5.5.290.0100.07717.96
5.5.280.0130.06320.80
5.5.270.0130.08320.73
5.5.260.0100.05720.86
5.5.250.0130.07020.69
5.5.240.0270.06720.24

preferences:
74.89 ms | 401 KiB | 5 Q