3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a () { function b() { echo "I am b.\n"; } echo "I am a.\n"; } echo function_exists("b") ? "b is defined\n" : "b is not defined"; a(); echo function_exists("b") ? "b is defined\n" : "b is not defined"; 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)
8.3.40.0100.00718.61
8.3.30.0110.00319.14
8.3.20.0040.00420.05
8.3.10.0050.00321.72
8.3.00.0050.00317.80
8.2.170.0170.00322.96
8.2.160.0120.00320.44
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0050.00220.96
8.2.110.0070.00422.24
8.2.100.0080.00417.59
8.2.90.0050.00319.23
8.2.80.0080.00017.97
8.2.70.0030.00617.38
8.2.60.0000.00717.91
8.2.50.0000.00818.07
8.2.40.0000.00718.03
8.2.30.0030.00618.00
8.2.20.0040.00417.71
8.2.10.0040.00417.91
8.2.00.0000.00717.61
8.1.270.0070.00322.03
8.1.260.0040.00426.35
8.1.250.0080.00828.09
8.1.240.0090.00023.93
8.1.230.0060.00619.10
8.1.220.0090.00017.74
8.1.210.0030.00518.77
8.1.200.0060.00317.35
8.1.190.0030.00617.10
8.1.180.0040.00418.10
8.1.170.0040.00418.42
8.1.160.0000.00722.02
8.1.150.0000.00718.73
8.1.140.0040.00417.32
8.1.130.0000.00717.63
8.1.120.0000.00717.31
8.1.110.0040.00417.43
8.1.100.0050.00317.41
8.1.90.0030.00717.30
8.1.80.0040.00417.38
8.1.70.0070.00017.30
8.1.60.0080.00017.41
8.1.50.0080.00017.44
8.1.40.0040.00417.44
8.1.30.0000.00917.64
8.1.20.0000.01017.45
8.1.10.0050.00317.48
8.1.00.0050.00217.27
8.0.300.0040.00418.77
8.0.290.0030.00516.63
8.0.280.0000.00718.43
8.0.270.0030.00317.10
8.0.260.0000.00617.21
8.0.250.0070.00016.93
8.0.240.0040.00416.86
8.0.230.0030.00316.78
8.0.220.0070.00016.72
8.0.210.0000.00716.70
8.0.200.0030.00316.77
8.0.190.0030.00316.78
8.0.180.0070.00016.76
8.0.170.0050.00316.89
8.0.160.0000.00816.85
8.0.150.0050.00316.68
8.0.140.0070.00016.69
8.0.130.0040.00413.25
8.0.120.0030.00516.77
8.0.110.0070.00016.82
8.0.100.0040.00416.84
8.0.90.0030.00516.83
8.0.80.0060.01216.89
8.0.70.0000.00716.73
8.0.60.0000.00716.63
8.0.50.0040.00416.81
8.0.30.0130.00616.99
8.0.20.0160.00417.40
8.0.10.0050.00316.99
8.0.00.0080.01116.79
7.4.330.0030.00315.00
7.4.320.0030.00316.30
7.4.300.0000.00616.45
7.4.290.0050.00316.54
7.4.280.0030.00416.45
7.4.270.0040.00316.43
7.4.260.0000.00616.52
7.4.250.0040.00416.51
7.4.240.0020.00516.44
7.4.230.0030.00316.42
7.4.220.0110.01116.41
7.4.210.0090.00616.40
7.4.200.0070.00016.34
7.4.160.0160.00016.39
7.4.150.0110.01417.40
7.4.140.0110.01417.86
7.4.130.0170.00016.36
7.4.120.0120.00616.42
7.4.110.0130.00316.68
7.4.100.0120.00616.45
7.4.90.0120.00616.32
7.4.80.0060.01119.39
7.4.70.0030.01316.43
7.4.60.0060.01216.50
7.4.50.0050.00316.56
7.4.40.0070.01116.45
7.4.30.0090.00616.48
7.4.00.0070.01114.84
7.3.330.0030.00313.24
7.3.320.0030.00313.25
7.3.310.0000.00616.13
7.3.300.0030.00316.15
7.3.290.0040.01016.21
7.3.280.0080.01116.21
7.3.270.0120.01217.40
7.3.260.0100.00716.30
7.3.240.0110.00616.41
7.3.230.0100.00616.40
7.3.210.0170.00016.31
7.3.200.0030.01919.39
7.3.190.0120.00616.48
7.3.180.0070.01016.46
7.3.170.0090.00616.30
7.3.160.0100.00716.26
7.3.120.0040.01114.98
7.2.330.0030.01716.37
7.2.320.0110.00516.39
7.2.310.0060.01016.60
7.2.300.0060.00916.60
7.2.290.0080.00816.24
7.2.00.0070.00719.34
7.1.100.0120.00717.56
7.1.70.0000.00916.82
7.1.60.0030.02119.25
7.1.50.0040.01816.56
7.1.00.0000.08022.48
7.0.200.0030.00316.72
7.0.140.0100.06322.04
7.0.60.0070.07320.02
7.0.50.0030.04017.83
7.0.40.0070.04020.02
7.0.30.0200.04720.25
7.0.20.0330.07720.24
7.0.10.0100.07320.07
7.0.00.0030.09320.26
5.6.280.0070.06720.78
5.6.210.0100.06020.55
5.6.200.0000.05318.29
5.6.190.0170.06320.49
5.6.180.0470.04020.39
5.6.170.0470.05720.52
5.6.160.0000.04720.50
5.6.150.0070.05318.22
5.6.140.0030.09018.18
5.6.130.0070.05018.17
5.6.120.0030.04020.99
5.6.110.0030.04021.10
5.6.100.0130.06721.00
5.6.90.0070.04021.00
5.6.80.0000.06020.35
5.5.350.0170.04320.33
5.5.340.0130.07317.96
5.5.330.0100.07720.42
5.5.320.0200.08020.38
5.5.310.0200.03720.44
5.5.300.0030.07317.92
5.5.290.0030.04318.07
5.5.280.0070.06020.74
5.5.270.0070.08320.87
5.5.260.0030.05720.79
5.5.250.0130.05320.43
5.5.240.0070.07020.23
5.4.450.0570.06019.55
5.4.440.0970.07019.71
5.4.430.0770.07319.47
5.4.420.0530.05319.46
5.4.410.1070.04719.32
5.4.400.0970.05019.15
5.4.390.0730.05019.06
5.4.380.0170.05318.53
5.4.370.0030.05718.52
5.4.360.0170.04718.45
5.4.350.0080.05112.02
5.4.340.0140.10612.02
5.4.320.0070.03712.50
5.4.310.0040.04012.50
5.4.300.0050.03712.50
5.4.290.0060.03712.50
5.4.280.0050.03512.40
5.4.270.0050.03812.39
5.4.260.0080.03612.39
5.4.250.0020.04212.40
5.4.240.0080.03412.40
5.4.230.0060.03812.39
5.4.220.0050.03712.39
5.4.210.0050.03612.39
5.4.200.0040.04012.39
5.4.190.0080.03812.39
5.4.180.0030.03812.39
5.4.170.0040.03812.39
5.4.160.0050.03812.39
5.4.150.0090.03712.39
5.4.140.0060.03712.07
5.4.130.0080.03412.05
5.4.120.0080.03312.02
5.4.110.0040.03712.02
5.4.100.0040.03712.01
5.4.90.0050.03812.02
5.4.80.0040.03912.01
5.4.70.0060.03412.01
5.4.60.0060.03412.01
5.4.50.0040.03712.01
5.4.40.0070.03812.00
5.4.30.0050.03612.00
5.4.20.0070.03311.99
5.4.10.0050.03611.99
5.4.00.0020.03911.48
5.3.290.0050.04412.80
5.3.280.0050.03812.71
5.3.270.0090.03612.72
5.3.260.0050.04512.72
5.3.250.0060.03712.71
5.3.240.0060.03912.72
5.3.230.0070.03712.71
5.3.220.0060.03812.68
5.3.210.0030.04212.68
5.3.200.0060.03712.68
5.3.190.0050.03912.68
5.3.180.0070.03512.67
5.3.170.0030.04012.67
5.3.160.0020.04112.67
5.3.150.0120.03212.67
5.3.140.0070.04112.66
5.3.130.0070.03812.66
5.3.120.0060.04012.66
5.3.110.0050.04012.65
5.3.100.0030.04012.12
5.3.90.0030.04012.11
5.3.80.0090.03412.09
5.3.70.0040.04012.09
5.3.60.0090.04512.08
5.3.50.0060.03712.02
5.3.40.0060.03812.02
5.3.30.0070.03411.98
5.3.20.0070.03311.76
5.3.10.0040.03711.73
5.3.00.0020.03911.71
5.2.170.0070.0289.21
5.2.160.0050.0309.22
5.2.150.0040.0309.22
5.2.140.0030.0329.21
5.2.130.0060.0339.18
5.2.120.0040.0299.17
5.2.110.0030.0319.18
5.2.100.0080.0259.18
5.2.90.0030.0319.18
5.2.80.0040.0309.17
5.2.70.0040.0309.17
5.2.60.0070.0289.13
5.2.50.0050.0319.10
5.2.40.0050.0299.07
5.2.30.0050.0299.05
5.2.20.0050.0289.04
5.2.10.0030.0308.94
5.2.00.0020.0318.80
5.1.60.0020.0268.08
5.1.50.0040.0258.08
5.1.40.0050.0238.06
5.1.30.0050.0268.42
5.1.20.0060.0258.44
5.1.10.0040.0258.16
5.1.00.0030.0268.16
5.0.50.0010.0236.64
5.0.40.0030.0206.50
5.0.30.0040.0306.31
5.0.20.0020.0206.28
5.0.10.0020.0216.26
5.0.00.0020.0326.25
4.4.90.0040.0144.78
4.4.80.0050.0134.76
4.4.70.0020.0164.76
4.4.60.0010.0174.75
4.4.50.0050.0134.77
4.4.40.0040.0254.71
4.4.30.0010.0174.76
4.4.20.0030.0154.85
4.4.10.0030.0164.85
4.4.00.0030.0254.76
4.3.110.0030.0164.67
4.3.100.0030.0144.67
4.3.90.0010.0164.63
4.3.80.0060.0214.58
4.3.70.0030.0144.63
4.3.60.0050.0164.63
4.3.50.0040.0144.63
4.3.40.0020.0254.54
4.3.30.0000.0183.30
4.3.20.0030.0153.28
4.3.10.0020.0203.24
4.3.00.0070.0238.83

preferences:
40.16 ms | 400 KiB | 5 Q