3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a () { function b() { echo "I am b.\n"; } echo "I am a.\n"; } if (function_exists("b")) echo "b is defined.\n"; else echo "b is not defined.\n"; a(); if (function_exists("b")) echo "b is defined.\n"; else echo "b is not defined.\n";

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)
8.3.60.0060.01016.50
8.3.50.0120.00722.11
8.3.40.0060.00918.46
8.3.30.0110.00418.94
8.3.20.0080.00020.35
8.3.10.0030.00621.73
8.3.00.0090.00017.89
8.2.180.0060.01216.50
8.2.170.0070.00722.96
8.2.160.0100.00322.12
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0040.00421.09
8.2.110.0060.00322.08
8.2.100.0100.00017.78
8.2.90.0000.00819.28
8.2.80.0060.00317.97
8.2.70.0040.00417.50
8.2.60.0040.00417.80
8.2.50.0030.00618.07
8.2.40.0060.00319.95
8.2.30.0040.00818.08
8.2.20.0040.00417.67
8.2.10.0030.00517.85
8.2.00.0040.00417.53
8.1.280.0140.00425.92
8.1.270.0000.00822.08
8.1.260.0000.00726.35
8.1.250.0110.00728.09
8.1.240.0110.00023.97
8.1.230.0040.00719.00
8.1.220.0040.00417.74
8.1.210.0060.00318.77
8.1.200.0080.00017.23
8.1.190.0060.00317.13
8.1.180.0070.00418.10
8.1.170.0000.00918.66
8.1.160.0000.00822.07
8.1.150.0040.00418.87
8.1.140.0040.00417.39
8.1.130.0040.00217.76
8.1.120.0000.00717.41
8.1.110.0030.00417.38
8.1.100.0040.00417.41
8.1.90.0030.00717.42
8.1.80.0070.00017.44
8.1.70.0000.00717.34
8.1.60.0030.00517.41
8.1.50.0040.00417.50
8.1.40.0040.00417.44
8.1.30.0030.00617.59
8.1.20.0000.00817.57
8.1.10.0000.00717.49
8.1.00.0000.00717.43
8.0.300.0040.00418.77
8.0.290.0060.00316.63
8.0.280.0030.00318.50
8.0.270.0000.00817.20
8.0.260.0000.00617.10
8.0.250.0030.00316.88
8.0.240.0070.00016.76
8.0.230.0000.00716.85
8.0.220.0030.00316.80
8.0.210.0000.00616.88
8.0.200.0030.00316.89
8.0.190.0030.00316.88
8.0.180.0070.00016.79
8.0.170.0000.00716.85
8.0.160.0050.00316.74
8.0.150.0030.00316.74
8.0.140.0040.00416.80
8.0.130.0030.00313.32
8.0.120.0040.00416.80
8.0.110.0040.00416.85
8.0.100.0040.00416.74
8.0.90.0000.00716.71
8.0.80.0080.00816.86
8.0.70.0050.00316.85
8.0.60.0080.00016.83
8.0.50.0040.00416.65
8.0.30.0120.01217.04
8.0.20.0090.01317.40
8.0.10.0030.00516.79
8.0.00.0070.01116.80
7.4.330.0060.00015.00
7.4.320.0030.00316.43
7.4.300.0000.00716.57
7.4.290.0030.00316.46
7.4.280.0000.00816.51
7.4.270.0000.00716.43
7.4.260.0000.00716.43
7.4.250.0000.00716.51
7.4.240.0050.00216.55
7.4.230.0000.00716.42
7.4.220.0120.00616.45
7.4.210.0070.01016.64
7.4.200.0070.00016.34
7.4.160.0080.00816.39
7.4.150.0130.00717.40
7.4.140.0090.00917.86
7.4.130.0070.01116.35
7.4.120.0060.01316.46
7.4.110.0060.00916.37
7.4.100.0130.00516.39
7.4.90.0120.00616.50
7.4.80.0090.00919.39
7.4.70.0000.01716.52
7.4.60.0140.00316.63
7.4.50.0000.00816.33
7.4.40.0130.01316.31
7.4.30.0060.01016.70
7.4.00.0040.00414.74
7.3.330.0000.00513.07
7.3.320.0000.00513.24
7.3.310.0000.00616.17
7.3.300.0040.00416.28
7.3.290.0120.00316.16
7.3.280.0060.01016.21
7.3.270.0130.00317.40
7.3.260.0070.01116.38
7.3.240.0130.00316.27
7.3.230.0090.00616.39
7.3.210.0120.00616.37
7.3.200.0190.00319.39
7.3.190.0080.00816.53
7.3.180.0090.00616.39
7.3.170.0040.01116.32
7.3.160.0070.01016.27
7.3.120.0110.00315.11
7.2.330.0060.01016.36
7.2.320.0100.01016.28
7.2.310.0070.01016.66
7.2.300.0080.00816.28
7.2.290.0050.01016.60
7.2.00.0030.00619.21
7.1.100.0260.00617.25
7.1.70.0040.00416.95
7.1.60.0090.01519.25
7.1.50.0040.00716.72
7.1.00.0030.07722.28
7.0.200.0070.00416.73
7.0.140.0070.06322.05
7.0.60.0100.07319.90
7.0.50.0070.04017.86
7.0.40.0100.07720.23
7.0.30.0400.04320.20
7.0.20.0200.06020.11
7.0.10.0230.07020.20
7.0.00.0070.07320.06
5.6.280.0030.07320.92
5.6.210.0070.07720.55
5.6.200.0030.08718.29
5.6.190.0100.04320.61
5.6.180.0330.07720.48
5.6.170.0170.04720.52
5.6.160.0130.04020.61
5.6.150.0100.05318.18
5.6.140.0100.08018.14
5.6.130.0070.03718.18
5.6.120.0070.08021.12
5.6.110.0030.08321.00
5.6.100.0030.09021.14
5.6.90.0100.08021.02
5.6.80.0170.07320.38
5.5.350.3800.04320.46
5.5.340.0070.05318.01
5.5.330.0100.03720.40
5.5.320.0370.07320.33
5.5.310.0300.03720.30
5.5.300.0130.07717.94
5.5.290.0030.07318.08
5.5.280.0000.04320.98
5.5.270.0130.06320.79
5.5.260.0130.06720.79
5.5.250.0130.07020.70
5.5.240.1000.04720.27
5.4.450.0530.04319.39
5.4.440.0530.05019.57
5.4.430.0200.04719.16
5.4.420.0270.04019.49
5.4.410.0500.03719.07
5.4.400.0330.04718.98
5.4.390.0270.04719.24
5.4.380.0330.06018.46
5.4.370.0330.05018.75
5.4.360.0430.07018.51
5.4.350.0400.05718.47
5.4.340.0470.05318.80
5.4.320.0070.04212.50
5.4.310.0050.04012.50
5.4.300.0040.03912.50
5.4.290.0050.03912.50
5.4.280.0060.03512.40
5.4.270.0050.03812.40
5.4.260.0040.04012.40
5.4.250.0070.03712.40
5.4.240.0070.03612.40
5.4.230.0050.03912.39
5.4.220.0030.03912.39
5.4.210.0070.03512.39
5.4.200.0060.03712.39
5.4.190.0040.03812.39
5.4.180.0090.03412.38
5.4.170.0060.03612.40
5.4.160.0060.03612.39
5.4.150.0060.03612.39
5.4.140.0050.03812.07
5.4.130.0050.03612.06
5.4.120.0060.03612.02
5.4.110.0060.03412.01
5.4.100.0050.03612.02
5.4.90.0060.03712.01
5.4.80.0060.03612.01
5.4.70.0080.03312.01
5.4.60.0060.03512.01
5.4.50.0100.03112.01
5.4.40.0060.03412.00
5.4.30.0060.03511.99
5.4.20.0050.03512.00
5.4.10.0060.03411.99
5.4.00.0050.03611.48
5.3.290.0060.04812.80
5.3.280.0080.03512.71
5.3.270.0070.03812.72
5.3.260.0060.04012.72
5.3.250.0040.03812.72
5.3.240.0060.03612.72
5.3.230.0040.03812.71
5.3.220.0060.03712.68
5.3.210.0060.04012.68
5.3.200.0030.04412.68
5.3.190.0040.03912.68
5.3.180.0090.03412.68
5.3.170.0040.03912.67
5.3.160.0050.03812.67
5.3.150.0040.04012.67
5.3.140.0040.03912.66
5.3.130.0070.03912.66
5.3.120.0030.04112.66
5.3.110.0090.03712.66
5.3.100.0090.03412.12
5.3.90.0050.03812.10
5.3.80.0030.03912.09
5.3.70.0050.03712.09
5.3.60.0060.03612.08
5.3.50.0100.03312.02
5.3.40.0080.03612.02
5.3.30.0040.03711.98
5.3.20.0060.03511.76
5.3.10.0070.03711.73
5.3.00.0060.03711.71
5.2.170.0110.0289.21
5.2.160.0030.0329.21
5.2.150.0050.0329.21
5.2.140.0040.0329.21
5.2.130.0040.0309.17
5.2.120.0070.0289.17
5.2.110.0080.0359.18
5.2.100.0040.0319.17
5.2.90.0040.0359.17
5.2.80.0080.0419.17
5.2.70.0120.0359.17
5.2.60.0070.0319.13
5.2.50.0060.0319.10
5.2.40.0050.0309.08
5.2.30.0070.0289.04
5.2.20.0060.0289.04
5.2.10.0070.0358.94
5.2.00.0060.0388.80
5.1.60.0070.0228.08
5.1.50.0030.0278.08
5.1.40.0040.0268.07
5.1.30.0040.0288.42
5.1.20.0050.0328.44
5.1.10.0040.0258.16
5.1.00.0050.0258.16
5.0.50.0020.0226.63
5.0.40.0020.0216.50
5.0.30.0040.0366.31
5.0.20.0080.0166.28
5.0.10.0030.0206.26
5.0.00.0030.0316.25
4.4.90.0040.0174.77
4.4.80.0040.0204.75
4.4.70.0030.0204.76
4.4.60.0040.0194.75
4.4.50.0040.0204.77
4.4.40.0010.0304.71
4.4.30.0020.0174.76
4.4.20.0030.0164.85
4.4.10.0010.0214.84
4.4.00.0040.0254.76
4.3.110.0040.0154.67
4.3.100.0040.0184.66
4.3.90.0050.0194.64
4.3.80.0030.0294.59
4.3.70.0020.0174.63
4.3.60.0020.0174.63
4.3.50.0050.0144.63
4.3.40.0030.0244.54
4.3.30.0030.0223.30
4.3.20.0020.0213.28
4.3.10.0020.0183.24
4.3.00.0100.01315.27

preferences:
45.44 ms | 401 KiB | 5 Q