3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private $p1 = "secret"; public function B() { var_dump($this); ${'t' . 'his'} = 'hidden'; // works var_dump($this); var_dump($GLOBALS['this']); // class is global but $this is not since only refers to this particular object. $GLOBALS['this'] = 'lovely'; var_dump($this, $GLOBALS['this']); echo "{$GLOBALS['this']} $this {$this->p1}"; } } $a = new A; $a->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)
8.3.60.0120.00316.63
8.3.50.0030.01019.58
8.3.40.0120.00318.79
8.3.30.0100.00319.07
8.3.20.0000.00720.21
8.3.10.0050.00323.66
8.3.00.0040.00419.26
8.2.180.0070.00716.50
8.2.170.0040.01122.96
8.2.160.0110.00420.53
8.2.150.0090.00024.18
8.2.140.0080.00024.66
8.2.130.0070.00026.16
8.2.120.0000.00820.95
8.2.110.0060.00320.35
8.2.100.0050.00517.72
8.2.90.0000.00819.09
8.2.80.0000.00817.97
8.2.70.0040.00417.38
8.2.60.0000.00917.91
8.2.50.0050.00318.07
8.2.40.0000.00718.21
8.2.30.0000.00717.93
8.2.20.0040.00417.47
8.2.10.0000.00717.90
8.2.00.0000.00717.42
8.1.280.0030.01225.92
8.1.270.0050.00323.86
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0030.00719.48
8.1.230.0120.00020.88
8.1.220.0080.00018.56
8.1.210.0060.00318.77
8.1.200.0060.00317.47
8.1.190.0080.00317.35
8.1.180.0040.00418.10
8.1.170.0000.01018.47
8.1.160.0080.00021.92
8.1.150.0020.00518.83
8.1.140.0000.00917.30
8.1.130.0030.00317.80
8.1.120.0000.00717.47
8.1.110.0040.00417.48
8.1.100.0050.00317.48
8.1.90.0000.00717.47
8.1.80.0050.00317.49
8.1.70.0000.00717.43
8.1.60.0060.00317.52
8.1.50.0050.00317.50
8.1.40.0000.00817.55
8.1.30.0040.00417.63
8.1.20.0040.00417.61
8.1.10.0000.00717.59
8.1.00.0040.00417.43
8.0.300.0070.00018.77
8.0.290.0000.00716.75
8.0.280.0030.00518.51
8.0.270.0070.00017.28
8.0.260.0030.00317.26
8.0.250.0030.00317.02
8.0.240.0040.00417.02
8.0.230.0030.00317.04
8.0.220.0040.00416.95
8.0.210.0020.00516.87
8.0.200.0030.00316.95
8.0.190.0000.01117.02
8.0.180.0000.00717.04
8.0.170.0020.00516.99
8.0.160.0030.00316.91
8.0.150.0000.00816.95
8.0.140.0040.00416.85
8.0.130.0060.00013.43
8.0.120.0040.00416.93
8.0.110.0070.00017.02
8.0.100.0040.00417.02
8.0.90.0050.00316.87
8.0.80.0080.00916.96
8.0.70.0000.00716.82
8.0.60.0000.00716.96
8.0.50.0000.00716.93
8.0.30.0090.01317.05
8.0.20.0100.00917.40
8.0.10.0040.00417.02
8.0.00.0070.01516.76
7.4.330.0020.00215.01
7.4.320.0000.00716.60
7.4.300.0060.00016.61
7.4.290.0070.00016.60
7.4.280.0030.00616.66
7.4.270.0040.00416.52
7.4.260.0000.00716.49
7.4.250.0000.00716.37
7.4.240.0070.00016.58
7.4.230.0000.00816.58
7.4.220.0120.00616.70
7.4.210.0100.01016.51
7.4.200.0070.00016.39
7.4.160.0030.01316.47
7.4.150.0070.01417.40
7.4.140.0150.00517.86
7.4.130.0120.00616.43
7.4.120.0060.01216.48
7.4.110.0040.01316.69
7.4.100.0060.01216.52
7.4.90.0090.01216.48
7.4.80.0090.01019.39
7.4.70.0100.00616.40
7.4.60.0100.00616.81
7.4.50.0000.00816.43
7.4.40.0080.00816.36
7.4.30.0120.00516.41
7.4.00.0060.00614.71
7.3.330.0000.00513.18
7.3.320.0000.00613.39
7.3.310.0000.00716.36
7.3.300.0040.00416.25
7.3.290.0110.01016.29
7.3.280.0140.00516.38
7.3.270.0070.01017.40
7.3.260.0140.00316.38
7.3.250.0090.00916.47
7.3.240.0120.00916.35
7.3.230.0140.00316.55
7.3.210.0080.00816.37
7.3.200.0060.01419.39
7.3.190.0000.01716.42
7.3.180.0120.00416.32
7.3.170.0110.00816.40
7.3.160.0090.00616.36
7.2.330.0150.00316.57
7.2.320.0070.01816.30
7.2.310.0110.00716.30
7.2.300.0070.01216.71
7.2.290.0140.00716.48
7.2.60.0070.00716.70
7.2.00.0000.01419.48
7.1.200.0070.00315.74
7.1.100.0080.00318.36
7.1.70.0000.00916.87
7.1.60.0030.02019.40
7.1.50.0060.01516.86
7.1.00.0100.07022.44
7.0.200.0030.00616.84
7.0.140.0030.07721.92
7.0.60.0070.08719.92
7.0.50.0070.05717.88
7.0.40.0100.05020.21
7.0.30.0200.04320.26
7.0.20.0170.05720.19
7.0.10.0070.09020.06
7.0.00.0070.07720.06
5.6.210.0130.07320.51
5.6.200.0100.05018.21
5.6.190.0000.05720.39
5.6.180.0230.08020.47
5.6.170.0230.04320.56
5.6.160.0130.05720.52
5.6.150.0100.06318.18
5.6.140.0130.07318.19
5.6.130.0030.09318.15
5.6.120.0100.06020.99
5.6.110.0030.04021.00
5.6.100.0170.07320.97
5.6.90.0030.06020.96
5.6.80.0130.06720.36
5.5.350.0230.03020.34
5.5.340.0100.07017.98
5.5.330.0000.09020.40
5.5.320.0230.05320.27
5.5.310.0230.04720.31
5.5.300.0070.07318.04
5.5.290.0030.04018.07
5.5.280.0130.07720.96
5.5.270.0100.06020.88
5.5.260.0000.04320.64
5.5.250.0030.04720.70
5.5.240.0070.07720.19
5.4.450.0430.06019.31
5.4.440.0800.05719.52
5.4.430.0870.06719.51
5.4.420.0930.05019.53
5.4.410.0630.06319.30
5.4.400.0930.06019.29
5.4.390.0800.05319.29
5.4.380.0000.05718.75
5.4.370.0000.05018.76
5.4.360.0070.04018.79
5.4.350.0140.09012.02
5.4.340.0060.03712.02
5.4.320.0020.04312.50
5.4.310.0060.03712.50
5.4.300.0080.04012.50
5.4.290.0060.03612.50
5.4.280.0020.03812.40
5.4.270.0070.03412.39
5.4.260.0050.03812.39
5.4.250.0080.03912.39
5.4.240.0070.03812.40
5.4.230.0070.04412.39
5.4.220.0010.04412.39
5.4.210.0060.04312.39
5.4.200.0080.03912.39
5.4.190.0080.03912.38
5.4.180.0060.03512.38
5.4.170.0060.03612.40
5.4.160.0050.04212.39
5.4.150.0080.03312.38
5.4.140.0090.04112.07
5.4.130.0030.03812.06
5.4.120.0080.04012.02
5.4.110.0080.03312.01
5.4.100.0040.03812.02
5.4.90.0080.04112.01
5.4.80.0060.03712.02
5.4.70.0080.04212.01
5.4.60.0040.03712.01
5.4.50.0060.03512.01
5.4.40.0040.04011.99
5.4.30.0060.03511.99
5.4.20.0040.03711.99
5.4.10.0040.03611.99
5.4.00.0040.03811.48
5.3.290.0080.03812.80
5.3.280.0080.03712.71
5.3.270.0060.03912.72
5.3.260.0070.03712.72
5.3.250.0080.03412.72
5.3.240.0040.03912.71
5.3.230.0080.03512.71
5.3.220.0050.03812.68
5.3.210.0070.04112.68
5.3.200.0050.03712.68
5.3.190.0080.03512.68
5.3.180.0040.03812.67
5.3.170.0050.03712.67
5.3.160.0040.04212.68
5.3.150.0060.03612.67
5.3.140.0060.04112.66
5.3.130.0090.04112.66
5.3.120.0100.03612.66
5.3.110.0080.03712.66
5.3.100.0070.03612.11
5.3.90.0060.03612.10
5.3.80.0060.03812.09
5.3.70.0060.03612.09
5.3.60.0050.03712.07
5.3.50.0050.03812.02
5.3.40.0050.03912.02
5.3.30.0060.03411.98
5.3.20.0070.03511.76
5.3.10.0040.03911.73
5.3.00.0090.03311.71
5.2.170.0070.0349.21
5.2.160.0050.0359.21
5.2.150.0050.0309.22
5.2.140.0050.0309.21
5.2.130.0050.0319.18
5.2.120.0020.0319.17
5.2.110.0040.0299.18
5.2.100.0080.0359.18
5.2.90.0050.0299.18
5.2.80.0040.0309.17
5.2.70.0050.0299.17
5.2.60.0050.0299.13
5.2.50.0070.0289.10
5.2.40.0070.0269.07
5.2.30.0040.0319.05
5.2.20.0040.0329.04
5.2.10.0040.0288.94
5.2.00.0030.0308.80
5.1.60.0030.0248.09
5.1.50.0070.0218.09
5.1.40.0070.0218.07
5.1.30.0070.0308.41
5.1.20.0070.0328.44
5.1.10.0050.0248.16
5.1.00.0050.0248.16
5.0.50.0050.0186.64
5.0.40.0050.0226.50
5.0.30.0040.0316.31
5.0.20.0060.0246.28
5.0.10.0020.0206.25
5.0.00.0040.0376.25
4.4.90.0030.0184.78
4.4.80.0030.0174.76
4.4.70.0040.0144.75
4.4.60.0000.0194.75
4.4.50.0040.0144.77
4.4.40.0030.0324.71
4.4.30.0030.0214.76
4.4.20.0020.0164.84
4.4.10.0030.0204.85
4.4.00.0030.0284.75
4.3.110.0040.0194.67
4.3.100.0010.0164.66
4.3.90.0020.0144.63
4.3.80.0020.0244.58
4.3.70.0020.0214.63
4.3.60.0020.0154.63
4.3.50.0020.0234.62
4.3.40.0030.0294.53
4.3.30.0010.0163.30
4.3.20.0000.0253.28
4.3.10.0030.0173.23
4.3.00.0030.0207.12

preferences:
51.86 ms | 400 KiB | 5 Q