3v4l.org

run code in 300+ PHP versions simultaneously
<?php class foo { function __construct() { $this->a = "hello"; $this->b = "hi"; $this->val = "howdy"; $val = "a"; echo $this->{$val}; // outputs "hello" echo "\n"; $val = "b"; echo $this->{$val}; // outputs "hi" echo "\n"; echo $this->val; //outputs "howdy" echo "\n"; echo $this->{"val"}; } } echo "hola"; $foo = new foo();

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)
8.3.60.0000.01418.31
8.3.50.0120.00921.91
8.3.40.0150.00618.72
8.3.30.0100.00619.13
8.3.20.0000.00820.25
8.3.10.0080.00020.54
8.3.00.0000.00719.79
8.2.180.0130.01016.50
8.2.170.0100.00722.96
8.2.160.0110.00320.35
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0000.00726.16
8.2.120.0080.00021.99
8.2.110.0070.00420.37
8.2.100.0040.00717.84
8.2.90.0000.00819.22
8.2.80.0030.00617.97
8.2.70.0040.00417.63
8.2.60.0000.00817.90
8.2.50.0030.00518.22
8.2.40.0000.00720.55
8.2.30.0000.00821.02
8.2.20.0040.00417.64
8.2.10.0000.00818.12
8.2.00.0000.00817.65
8.1.280.0070.01325.92
8.1.270.0040.00423.98
8.1.260.0030.00626.35
8.1.250.0050.00328.09
8.1.240.0030.00622.09
8.1.230.0050.00517.83
8.1.220.0000.00917.74
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0090.00017.54
8.1.180.0060.00318.10
8.1.170.0000.00818.66
8.1.160.0070.00018.87
8.1.150.0000.00820.67
8.1.140.0030.00617.36
8.1.130.0050.00217.79
8.1.120.0000.00917.47
8.1.110.0070.00017.36
8.1.100.0040.00417.49
8.1.90.0000.00717.36
8.1.80.0050.00317.44
8.1.70.0040.00417.43
8.1.60.0060.00317.58
8.1.50.0040.00417.54
8.1.40.0000.00817.58
8.1.30.0000.00817.54
8.1.20.0000.00817.60
8.1.10.0040.00417.43
8.1.00.0040.00417.51
8.0.300.0040.00418.77
8.0.290.0000.00716.63
8.0.280.0030.00318.44
8.0.270.0000.00717.13
8.0.260.0000.00617.19
8.0.250.0030.00316.83
8.0.240.0040.00416.95
8.0.230.0000.00716.99
8.0.220.0000.00716.94
8.0.210.0000.00716.78
8.0.200.0000.00616.84
8.0.190.0050.00316.98
8.0.180.0070.00316.79
8.0.170.0070.00016.94
8.0.160.0050.00216.91
8.0.150.0040.00416.79
8.0.140.0040.00416.86
8.0.130.0000.00613.38
8.0.120.0080.00016.70
8.0.110.0040.00416.84
8.0.100.0040.00416.93
8.0.90.0000.00716.93
8.0.80.0100.01016.84
8.0.70.0070.00016.88
8.0.60.0040.00416.86
8.0.50.0070.00016.75
8.0.30.0070.01217.24
8.0.20.0110.00717.41
8.0.10.0040.00417.07
8.0.00.0100.00816.80
7.4.330.0020.00215.03
7.4.320.0060.00016.55
7.4.300.0030.00316.63
7.4.290.0030.00316.59
7.4.280.0040.00416.48
7.4.270.0000.00616.50
7.4.260.0040.00416.57
7.4.250.0040.00416.52
7.4.240.0060.00116.52
7.4.230.0000.00616.52
7.4.220.0070.01116.56
7.4.210.0110.00416.47
7.4.200.0040.00316.61
7.4.160.0100.00616.66
7.4.150.0160.01017.40
7.4.140.0090.00817.86
7.4.130.0090.01016.52
7.4.120.0070.01016.40
7.4.110.0090.00816.30
7.4.100.0090.00616.30
7.4.90.0170.00016.44
7.4.80.0030.01316.67
7.4.70.0080.01116.46
7.4.60.0060.00916.44
7.4.50.0000.00916.43
7.4.40.0070.01516.53
7.4.30.0130.00316.39
7.4.00.0070.00715.11
7.3.330.0020.00513.23
7.3.320.0000.00613.39
7.3.310.0030.00316.40
7.3.300.0000.00716.41
7.3.290.0030.01116.46
7.3.280.0070.00816.40
7.3.270.0160.00417.40
7.3.260.0110.01216.34
7.3.250.0100.00716.49
7.3.240.0080.00816.57
7.3.230.0140.00916.39
7.3.210.0070.01016.48
7.3.200.0080.01319.39
7.3.190.0060.01116.37
7.3.180.0070.01016.34
7.3.170.0090.00616.54
7.3.160.0030.01816.66
7.2.330.0030.01316.62
7.2.320.0110.00616.53
7.2.310.0080.01516.64
7.2.300.0130.00316.52
7.2.290.0070.01016.54
7.1.100.0090.00018.43
7.1.70.0030.00617.31
7.1.60.0070.01419.32
7.1.50.0100.01316.91
7.1.00.0000.08022.40
7.0.200.0030.00616.41
7.0.140.0100.06721.90
7.0.60.0130.05319.93
7.0.50.0030.07017.95
7.0.40.0100.05320.18
7.0.30.0570.06720.21
7.0.20.0330.04720.22
7.0.10.0000.09320.04
7.0.00.0070.04320.10
5.6.280.0070.07020.91
5.6.210.0030.07020.55
5.6.200.0070.06318.29
5.6.190.0030.05020.38
5.6.180.3230.05020.77
5.6.170.0470.06720.55
5.6.160.0100.08020.50
5.6.150.0070.08018.26
5.6.140.0130.04018.15
5.6.130.0000.04318.12
5.6.120.0100.05720.99
5.6.110.0130.08021.02
5.6.100.0170.06721.01
5.6.90.0300.07020.99
5.6.80.0100.08020.44
5.6.70.4800.03320.37
5.5.350.0170.08720.47
5.5.340.0030.07017.97
5.5.330.0170.07320.48
5.5.320.0330.06320.27
5.5.310.0170.05020.18
5.5.300.0030.03717.94
5.5.290.0030.04018.03
5.5.280.0030.04320.90
5.5.270.0070.06020.77
5.5.260.0100.06020.73
5.5.250.0130.04720.68
5.5.240.0130.06020.27
5.4.450.0230.05319.20
5.4.440.0830.06019.63
5.4.430.1230.05319.64
5.4.420.1030.05019.19
5.4.410.1000.05719.56
5.4.400.1400.04319.00
5.4.390.0070.05718.87
5.4.380.0430.05018.79
5.4.370.0430.05318.78
5.4.360.0370.05018.81
5.4.350.0370.07018.72
5.4.340.0530.05318.79
5.4.320.0080.03412.50
5.4.310.0050.03812.50
5.4.300.0060.03712.50
5.4.290.0090.03712.49
5.4.280.0060.03512.40
5.4.270.0070.03412.39
5.4.260.0020.04112.39
5.4.250.0020.04112.39
5.4.240.0060.03612.39
5.4.230.0100.03512.38
5.4.220.0040.03812.39
5.4.210.0040.03612.38
5.4.200.0070.03612.39
5.4.190.0080.03312.38
5.4.180.0070.03512.38
5.4.170.0050.03612.39
5.4.160.0060.03612.39
5.4.150.0100.03412.38
5.4.140.0050.03812.07
5.4.130.0060.03612.05
5.4.120.0070.03412.02
5.4.110.0060.03412.01
5.4.100.0070.03312.02
5.4.90.0070.04312.01
5.4.80.0040.03912.02
5.4.70.0070.03312.01
5.4.60.0060.03412.00
5.4.50.0060.03512.01
5.4.40.0030.03612.00
5.4.30.0020.03811.99
5.4.20.0070.03312.00
5.4.10.0060.03811.99
5.4.00.0040.03711.48
5.3.290.0050.04112.80
5.3.280.0060.03712.71
5.3.270.0050.04012.73
5.3.260.0070.03812.72
5.3.250.0100.03512.72
5.3.240.0050.03712.72
5.3.230.0080.04112.71
5.3.220.0090.03712.68
5.3.210.0080.03712.68
5.3.200.0060.03912.68
5.3.190.0090.03412.68
5.3.180.0070.03512.67
5.3.170.0070.03412.67
5.3.160.0080.03612.67
5.3.150.0070.05212.67
5.3.140.0070.03512.66
5.3.130.0050.04112.66
5.3.120.0070.03712.66
5.3.110.0090.04412.66
5.3.100.0060.03612.12
5.3.90.0040.03712.10
5.3.80.0060.03612.09
5.3.70.0040.03912.09
5.3.60.0040.03812.08
5.3.50.0030.03912.02
5.3.40.0100.03212.02
5.3.30.0060.03411.98
5.3.20.0040.03711.77
5.3.10.0050.03611.73
5.3.00.0040.03911.72
5.2.170.0050.0319.22
5.2.160.0040.0309.22
5.2.150.0090.0269.22
5.2.140.0070.0309.22
5.2.130.0080.0289.18
5.2.120.0100.0229.18
5.2.110.0060.0289.18
5.2.100.0040.0299.18
5.2.90.0050.0289.18
5.2.80.0060.0289.17
5.2.70.0040.0319.17
5.2.60.0030.0319.13
5.2.50.0010.0359.10
5.2.40.0060.0329.07
5.2.30.0040.0309.04
5.2.20.0070.0279.04
5.2.10.0050.0288.94
5.2.00.0050.0298.80
5.1.60.0020.0288.09
5.1.50.0030.0278.08
5.1.40.0050.0238.07
5.1.30.0040.0268.41
5.1.20.0060.0258.43
5.1.10.0040.0278.16
5.1.00.0060.0238.16
5.0.50.0050.0196.64
5.0.40.0030.0196.50
5.0.30.0060.0296.31
5.0.20.0050.0186.27
5.0.10.0050.0186.25
5.0.00.0040.0396.25
4.4.90.0030.0224.77
4.4.80.0020.0224.75
4.4.70.0030.0224.75
4.4.60.0050.0204.76
4.4.50.0040.0204.77
4.4.40.0030.0254.71
4.4.30.0040.0184.76
4.4.20.0050.0144.84
4.4.10.0020.0174.85
4.4.00.0040.0254.76
4.3.110.0030.0154.66
4.3.100.0030.0154.66
4.3.90.0020.0154.63
4.3.80.0020.0254.58
4.3.70.0020.0154.63
4.3.60.0010.0164.63
4.3.50.0020.0164.62
4.3.40.0020.0264.54
4.3.30.0000.0183.30
4.3.20.0020.0183.28
4.3.10.0030.0163.24
4.3.00.0000.0236.80

preferences:
45.38 ms | 401 KiB | 5 Q