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)
8.3.40.0070.00718.57
8.3.30.0070.00719.04
8.3.20.0020.00520.29
8.3.10.0080.00023.57
8.3.00.0060.00317.50
8.2.170.0100.00322.96
8.2.160.0100.00320.38
8.2.150.0040.00424.18
8.2.140.0030.00524.66
8.2.130.0150.00326.16
8.2.120.0000.00720.89
8.2.110.0060.00320.47
8.2.100.0120.00017.59
8.2.90.0070.00019.09
8.2.80.0040.00417.97
8.2.70.0000.00817.13
8.2.60.0040.00417.80
8.2.50.0030.00618.07
8.2.40.0040.00418.09
8.2.30.0000.00717.86
8.2.20.0080.00017.43
8.2.10.0070.00017.92
8.2.00.0060.00317.51
8.1.270.0000.00823.77
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0040.00723.78
8.1.230.0060.00622.25
8.1.220.0050.00317.75
8.1.210.0040.00418.77
8.1.200.0030.00617.35
8.1.190.0040.00417.23
8.1.180.0040.00418.10
8.1.170.0090.00018.56
8.1.160.0000.00822.01
8.1.150.0000.00718.81
8.1.140.0070.00017.35
8.1.130.0030.00317.73
8.1.120.0040.00417.39
8.1.110.0030.00617.45
8.1.100.0040.00417.51
8.1.90.0000.00817.39
8.1.80.0040.00417.46
8.1.70.0000.00717.33
8.1.60.0000.00917.61
8.1.50.0080.00017.50
8.1.40.0050.00317.49
8.1.30.0000.00917.69
8.1.20.0050.00317.63
8.1.10.0040.00417.54
8.1.00.0040.00417.52
8.0.300.0030.00618.77
8.0.290.0070.00016.88
8.0.280.0030.00518.50
8.0.270.0000.00717.32
8.0.260.0000.00717.21
8.0.250.0000.00716.94
8.0.240.0040.00416.91
8.0.230.0000.00717.02
8.0.220.0070.00017.01
8.0.210.0040.00416.96
8.0.200.0000.00617.03
8.0.190.0090.00017.01
8.0.180.0000.00716.95
8.0.170.0060.00316.89
8.0.160.0030.00717.09
8.0.150.0080.00016.79
8.0.140.0000.00816.98
8.0.130.0000.00513.31
8.0.120.0040.00417.02
8.0.110.0030.00516.86
8.0.100.0040.00416.83
8.0.90.0040.00416.74
8.0.80.0060.00916.95
8.0.70.0030.00516.83
8.0.60.0000.00716.86
8.0.50.0050.00216.87
8.0.30.0150.00717.07
8.0.20.0110.01017.40
8.0.10.0050.00316.93
8.0.00.0090.00916.95
7.4.330.0000.00515.03
7.4.320.0040.00416.56
7.4.300.0000.00716.50
7.4.290.0030.00316.49
7.4.280.0000.00716.51
7.4.270.0030.00316.52
7.4.260.0000.00916.54
7.4.250.0040.00416.57
7.4.240.0040.00416.59
7.4.230.0000.00716.41
7.4.220.0030.01616.48
7.4.210.0050.01016.54
7.4.200.0070.00016.67
7.4.160.0160.00616.54
7.4.150.0050.01317.40
7.4.140.0120.00917.86
7.4.130.0040.01316.64
7.4.120.0090.00816.51
7.4.110.0100.00716.52
7.4.100.0160.00616.65
7.4.90.0050.01116.46
7.4.80.0130.00919.39
7.4.70.0080.00816.49
7.4.60.0100.00716.61
7.4.50.0040.00016.66
7.4.40.0090.00916.44
7.4.30.0070.01116.45
7.4.00.0140.00315.02
7.3.330.0000.00513.15
7.3.320.0060.00013.37
7.3.310.0040.00416.41
7.3.300.0030.00316.42
7.3.290.0110.00316.35
7.3.280.0080.01116.43
7.3.270.0200.00017.40
7.3.260.0140.00316.50
7.3.250.0130.00716.44
7.3.240.0140.00416.54
7.3.230.0070.01016.39
7.3.210.0030.01316.30
7.3.200.0170.00719.39
7.3.190.0030.01816.58
7.3.180.0080.00816.24
7.3.170.0080.00716.41
7.3.160.0090.00916.53
7.3.10.0150.00316.28
7.3.00.0160.00816.50
7.2.330.0090.00916.44
7.2.320.0100.01316.52
7.2.310.0120.01216.70
7.2.300.0070.01316.48
7.2.290.0030.01316.38
7.2.130.0060.01416.18
7.2.120.0080.01115.88
7.2.110.0220.00316.20
7.2.100.0120.01216.53
7.2.90.0140.01116.48
7.2.80.0130.00516.64
7.2.70.0110.01116.28
7.2.60.0110.00616.55
7.2.50.0180.00716.14
7.2.40.0160.00716.44
7.2.30.0130.01316.66
7.2.20.0130.01316.50
7.2.10.0190.00416.41
7.2.00.0260.00516.57
7.1.250.0100.00515.20
7.1.200.0070.00415.48
7.1.100.0060.00618.07
7.1.70.0060.00616.94
7.1.60.0090.01219.40
7.1.50.0170.00716.86
7.1.00.0030.07722.36
7.0.200.0000.00816.81
7.0.140.0100.06721.97
7.0.60.0100.06319.96
7.0.50.0100.03317.87
7.0.40.0030.04320.15
7.0.30.0200.05320.23
7.0.20.0170.04020.23
7.0.10.0070.06720.15
7.0.00.0070.08720.16
5.6.210.0130.05720.66
5.6.200.0030.04318.19
5.6.190.0070.07320.55
5.6.180.3530.04020.41
5.6.170.0230.06320.39
5.6.160.0030.04720.52
5.6.150.0130.05018.29
5.6.140.0030.08018.19
5.6.130.0000.08018.27
5.6.120.0130.08021.09
5.6.110.0100.07021.13
5.6.100.0030.04021.11
5.6.90.0070.08721.00
5.6.80.0030.05020.45
5.6.70.4530.04020.53
5.5.350.0100.08020.35
5.5.340.0070.08318.09
5.5.330.0070.06720.33
5.5.320.3170.04320.30
5.5.310.0230.05320.41
5.5.300.0070.05017.95
5.5.290.0130.05017.93
5.5.280.0100.08320.88
5.5.270.0070.06320.84
5.5.260.0070.06720.80
5.5.250.0030.07020.71
5.5.240.0270.07020.19
5.4.450.0270.04019.46
5.4.440.0200.04719.29
5.4.430.0200.05019.40
5.4.420.0230.07319.41
5.4.410.0270.07719.50
5.4.400.0200.04019.07
5.4.390.0200.08018.82
5.4.380.0200.06319.09
5.4.370.0200.05718.88
5.4.360.0270.05019.20
5.4.350.0230.07018.86
5.4.340.0270.06719.13
5.4.320.0270.07019.05
5.4.310.0230.07018.98
5.4.300.0100.04718.85
5.4.290.0170.04018.85
5.4.280.0230.06719.15
5.4.270.0300.04019.22
5.4.260.0270.06018.96
5.4.250.0230.03319.16
5.4.240.0230.07019.21
5.4.230.0300.06719.07
5.4.220.0330.06719.23
5.4.210.0230.07018.86
5.4.200.0270.04019.15
5.4.190.0270.06719.30
5.4.180.0230.06719.21
5.4.170.0330.06019.23
5.4.160.0200.04719.11
5.4.150.0230.05019.29
5.4.140.0130.06716.34
5.4.130.0230.05016.32
5.4.120.0230.07316.49
5.4.110.0230.07016.52
5.4.100.0200.07016.41
5.4.90.0270.06316.63
5.4.80.0370.06016.44
5.4.70.0330.02716.57
5.4.60.0230.05016.52
5.4.50.0200.04716.53
5.4.40.0300.06316.53
5.4.30.0270.04316.32
5.4.20.0130.05716.52
5.4.10.0230.04016.32
5.4.00.0300.06015.75
5.3.290.0300.04314.64
5.3.280.0200.05314.60
5.3.270.0270.05714.61
5.3.260.0170.06714.50
5.3.250.0100.04314.82
5.3.240.0330.06314.69
5.3.230.0270.07014.60
5.3.220.0270.07014.49
5.3.210.0370.06714.54
5.3.200.0200.04714.56
5.3.190.0200.08014.48
5.3.180.0230.06014.47
5.3.170.0270.06714.58
5.3.160.0300.06314.59
5.3.150.0170.05014.72
5.3.140.0230.03014.77
5.3.130.0300.06314.51
5.3.120.0230.07014.62
5.3.110.0230.05714.53
5.3.100.0230.05314.05
5.3.90.0130.04314.18
5.3.80.0200.06714.07
5.3.70.0200.03714.07
5.3.60.0230.03014.22
5.3.50.0200.07313.85
5.3.40.0300.05713.84
5.3.30.0230.06713.91
5.3.20.0230.06713.70
5.3.10.0200.06313.72
5.3.00.0230.05713.86
5.2.170.0200.05711.95
5.2.160.0130.06711.95
5.2.150.0270.04311.95
5.2.140.0230.04311.95
5.2.130.0230.03311.95
5.2.120.0130.06311.95
5.2.110.0200.04711.95
5.2.100.0200.05011.95
5.2.90.0270.05011.95
5.2.80.0130.06311.95
5.2.70.0200.05011.95
5.2.60.0200.06011.95
5.2.50.0200.05311.95
5.2.40.0200.04311.95
5.2.30.0170.03711.95
5.2.20.0170.06011.95
5.2.10.0270.04311.95
5.2.00.0170.03711.95
5.1.60.0200.03311.95
5.1.50.0200.05011.95
5.1.40.0200.03011.95
5.1.30.0100.04011.95
5.1.20.0230.02711.95
5.1.10.0200.03011.95
5.1.00.0170.03311.95
5.0.50.0130.03011.95
5.0.40.0130.03711.95
5.0.30.0100.05711.95
5.0.20.0070.04011.95
5.0.10.0070.03311.95
5.0.00.0100.06011.95
4.4.90.0070.03011.95
4.4.80.0100.03011.95
4.4.70.0130.03011.95
4.4.60.0070.04011.95
4.4.50.0170.02311.95
4.4.40.0070.04711.95
4.4.30.0100.02311.95
4.4.20.0100.02011.95
4.4.10.0070.03311.95
4.4.00.0070.03311.95
4.3.110.0070.02311.95
4.3.100.0100.03011.95
4.3.90.0070.03011.95
4.3.80.0070.02311.95
4.3.70.0030.01711.95
4.3.60.0070.01311.95
4.3.50.0070.02311.95
4.3.40.0070.04711.95
4.3.30.0000.02711.95
4.3.20.0030.02011.95
4.3.10.0030.02011.95
4.3.00.0030.02011.95

preferences:
44.99 ms | 400 KiB | 5 Q