3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "\0"; if (is_string($string) && isset($string[0])) { echo "y"; } else { echo "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)
8.3.60.0130.01018.13
8.3.50.0110.00622.06
8.3.40.0110.00418.84
8.3.30.0030.01019.09
8.3.20.0070.00020.13
8.3.10.0040.00421.91
8.3.00.0050.00322.34
8.2.180.0090.00616.38
8.2.170.0040.01122.96
8.2.160.0070.00721.07
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0030.00519.36
8.2.110.0110.00622.08
8.2.100.0040.00719.64
8.2.90.0000.00719.40
8.2.80.0000.00817.97
8.2.70.0030.00517.38
8.2.60.0090.00017.93
8.2.50.0090.00318.07
8.2.40.0050.00318.28
8.2.30.0000.00718.23
8.2.20.0050.00317.77
8.2.10.0040.00417.67
8.2.00.0040.00417.73
8.1.280.0040.01125.92
8.1.270.0000.00922.14
8.1.260.0070.00026.35
8.1.250.0050.00328.09
8.1.240.0000.00824.01
8.1.230.0040.00719.04
8.1.220.0000.00717.74
8.1.210.0050.00318.77
8.1.200.0030.00617.35
8.1.190.0080.00017.48
8.1.180.0050.00518.10
8.1.170.0080.00018.46
8.1.160.0040.00422.06
8.1.150.0000.00818.57
8.1.140.0040.00417.43
8.1.130.0040.00417.77
8.1.120.0000.00717.51
8.1.110.0000.00717.50
8.1.100.0030.00317.46
8.1.90.0000.00717.43
8.1.80.0070.00017.46
8.1.70.0040.00417.37
8.1.60.0040.00417.63
8.1.50.0060.00317.34
8.1.40.0000.00817.51
8.1.30.0000.00717.59
8.1.20.0040.00417.56
8.1.10.0060.00317.61
8.1.00.0000.00917.48
8.0.300.0040.00418.77
8.0.290.0040.00417.16
8.0.280.0070.00018.35
8.0.270.0070.00017.25
8.0.260.0030.00316.82
8.0.250.0000.00616.98
8.0.240.0000.00716.82
8.0.230.0030.00316.98
8.0.220.0000.00716.90
8.0.210.0070.00016.95
8.0.200.0030.00316.93
8.0.190.0050.00216.82
8.0.180.0030.00316.99
8.0.170.0040.00416.98
8.0.160.0080.00016.89
8.0.150.0000.00716.88
8.0.140.0000.00716.75
8.0.130.0030.00413.36
8.0.120.0050.00216.79
8.0.110.0080.00016.91
8.0.100.0030.00316.72
8.0.90.0040.00416.88
8.0.80.0090.00616.93
8.0.70.0070.00016.93
8.0.60.0040.00416.87
8.0.50.0000.00716.93
8.0.30.0130.00617.28
8.0.20.0130.00717.40
8.0.10.0000.00716.87
8.0.00.0120.01016.74
7.4.330.0030.00215.00
7.4.320.0000.00716.61
7.4.300.0000.00616.55
7.4.290.0000.00616.48
7.4.280.0000.00716.59
7.4.270.0040.00416.65
7.4.260.0040.00416.41
7.4.250.0050.00316.44
7.4.240.0060.00116.46
7.4.230.0080.00016.62
7.4.220.0090.00916.69
7.4.210.0060.00916.57
7.4.200.0070.00016.60
7.4.190.0030.00516.73
7.4.160.0040.01216.25
7.4.150.0100.00717.40
7.4.140.0140.00617.86
7.4.130.0070.01016.46
7.4.120.0090.00816.34
7.4.110.0070.01016.39
7.4.100.0150.00316.50
7.4.90.0130.00616.53
7.4.80.0130.00619.39
7.4.70.0100.00616.34
7.4.60.0100.00716.30
7.4.50.0000.00916.16
7.4.40.0060.00922.77
7.4.30.0080.00816.53
7.4.00.0100.00714.61
7.3.330.0000.00613.09
7.3.320.0020.00213.11
7.3.310.0000.00716.03
7.3.300.0030.00316.09
7.3.290.0130.00716.22
7.3.280.0060.01416.21
7.3.270.0120.01217.40
7.3.260.0070.01016.36
7.3.250.0080.01016.32
7.3.240.0140.00316.39
7.3.230.0170.00416.43
7.3.210.0110.00716.43
7.3.200.0070.01419.39
7.3.190.0140.01016.12
7.3.180.0090.00616.22
7.3.170.0150.00016.44
7.3.160.0030.01316.42
7.3.120.0090.00614.59
7.3.10.0030.01016.48
7.3.00.0070.00716.38
7.2.330.0090.01216.50
7.2.320.0030.01416.41
7.2.310.0030.01316.66
7.2.300.0100.01016.57
7.2.290.0100.00716.72
7.2.130.0070.00316.87
7.2.120.0030.01016.86
7.2.110.0070.01016.79
7.2.100.0070.01016.79
7.2.90.0110.00316.84
7.2.80.0030.00616.88
7.2.70.0040.01116.57
7.2.60.0090.00616.69
7.2.50.0000.01416.96
7.2.40.0040.01117.05
7.2.30.0060.00916.91
7.2.20.0000.01117.02
7.2.10.0070.01016.73
7.2.00.0080.00918.11
7.1.250.0030.01015.77
7.1.100.0060.00618.17
7.1.70.0000.00816.72
7.1.60.0190.00619.82
7.1.50.0030.01016.84
7.1.00.0030.07322.50
7.0.200.0040.00416.94
7.0.140.0070.07022.10
7.0.60.0070.05320.06
7.0.50.0070.04717.66
7.0.40.0070.05020.24
7.0.30.0430.04020.34
7.0.20.0300.07320.03
7.0.10.0070.08320.30
7.0.00.0070.04320.01
5.6.210.0100.08320.76
5.6.200.0130.04718.22
5.6.190.0000.04720.41
5.6.180.3870.03720.41
5.6.170.0230.04320.38
5.6.160.0000.05720.51
5.6.150.0000.06318.21
5.6.140.0030.03718.11
5.6.130.0130.04718.09
5.6.120.0070.07021.02
5.6.110.0100.06720.96
5.6.100.0200.07320.95
5.6.90.0030.08720.95
5.6.80.0030.06720.38
5.6.70.3800.04320.49
5.5.350.0270.04720.34
5.5.340.0100.06717.90
5.5.330.0070.04320.37
5.5.320.0230.07320.28
5.5.310.0200.09020.28
5.5.300.0070.05017.91
5.5.290.0070.04317.92
5.5.280.0170.06720.79
5.5.270.0030.05320.88
5.5.260.0100.06320.74
5.5.250.0100.07020.79
5.5.240.0170.04020.26
5.4.450.0530.05719.32
5.4.440.0500.05319.27
5.4.430.0100.05319.35
5.4.420.0130.05019.40
5.4.410.0070.07018.72
5.4.400.0330.04718.66
5.4.390.0370.04018.68
5.4.380.0300.05018.62
5.4.370.0030.04318.55
5.4.360.0100.03318.64
5.4.350.0110.04311.97
5.4.340.0090.03211.96
5.4.320.0060.05112.45
5.4.310.0070.04712.45
5.4.300.0050.03712.45
5.4.290.0090.03612.45
5.4.280.0050.03712.34
5.4.270.0090.03512.31
5.4.260.0040.03912.32
5.4.250.0090.03612.31
5.4.240.0080.03712.31
5.4.230.0050.04012.30
5.4.220.0100.03212.31
5.4.210.0110.03012.31
5.4.200.0050.03912.31
5.4.190.0040.03812.30
5.4.180.0050.03712.30
5.4.170.0050.03712.32
5.4.160.0090.03212.30
5.4.150.0050.03712.30
5.4.140.0060.03711.99
5.4.130.0060.03411.98
5.4.120.0050.03911.93
5.4.110.0070.05011.93
5.4.100.0050.04111.93
5.4.90.0110.03211.93
5.4.80.0050.03711.93
5.4.70.0050.03511.93
5.4.60.0070.03311.92
5.4.50.0060.03511.93
5.4.40.0060.03411.91
5.4.30.0090.03311.91
5.4.20.0090.03311.91
5.4.10.0080.03211.91
5.4.00.0060.03911.39
5.3.290.0040.04012.80
5.3.280.0090.03412.71
5.3.270.0090.04012.72
5.3.260.0070.04112.72
5.3.250.0110.03912.72
5.3.240.0050.03712.72
5.3.230.0060.03712.71
5.3.220.0090.03312.68
5.3.210.0070.04112.68
5.3.200.0080.03612.68
5.3.190.0110.04212.68
5.3.180.0090.03412.68
5.3.170.0050.03912.67
5.3.160.0070.03812.67
5.3.150.0060.03912.68
5.3.140.0080.03612.66
5.3.130.0060.04012.66
5.3.120.0050.04012.65
5.3.110.0070.03812.66
5.3.100.0040.03912.12
5.3.90.0080.03412.09
5.3.80.0050.03712.08
5.3.70.0050.03712.07
5.3.60.0080.03612.06
5.3.50.0090.03312.00
5.3.40.0040.04012.00
5.3.30.0040.03611.94
5.3.20.0040.04011.70
5.3.10.0100.03011.65
5.3.00.0050.03811.64
5.2.170.0030.0339.14
5.2.160.0070.0269.15
5.2.150.0080.0299.15
5.2.140.0030.0329.14
5.2.130.0100.0249.10
5.2.120.0040.0299.10
5.2.110.0060.0289.11
5.2.100.0050.0299.11
5.2.90.0090.0339.11
5.2.80.0060.0379.10
5.2.70.0030.0329.10
5.2.60.0050.0299.05
5.2.50.0030.0329.02
5.2.40.0040.0319.00
5.2.30.0030.0318.97
5.2.20.0040.0308.96
5.2.10.0040.0278.89
5.2.00.0050.0308.75
5.1.60.0020.0308.03
5.1.50.0040.0258.03
5.1.40.0070.0268.02
5.1.30.0060.0258.37
5.1.20.0020.0298.39
5.1.10.0040.0288.11
5.1.00.0060.0238.11
5.0.50.0040.0196.59
5.0.40.0010.0216.45
5.0.30.0030.0326.27
5.0.20.0050.0186.23
5.0.10.0050.0236.21
5.0.00.0050.0306.20
4.4.90.0020.0164.78
4.4.80.0050.0134.75
4.4.70.0000.0194.75
4.4.60.0000.0184.75
4.4.50.0030.0144.77
4.4.40.0030.0254.71
4.4.30.0030.0144.75
4.4.20.0030.0144.84
4.4.10.0020.0164.85
4.4.00.0040.0244.76
4.3.110.0050.0134.67
4.3.100.0030.0154.67
4.3.90.0020.0154.63
4.3.80.0060.0234.58
4.3.70.0030.0184.63
4.3.60.0040.0134.63
4.3.50.0030.0164.63
4.3.40.0030.0244.53
4.3.30.0040.0143.27
4.3.20.0010.0173.25
4.3.10.0010.0173.21
4.3.00.0070.0236.91

preferences:
40.63 ms | 401 KiB | 5 Q