3v4l.org

run code in 300+ PHP versions simultaneously
<?php function machine_forget(&$data) { $data = null; } $answer = 90; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // shhh no spoilers class zombie { protected $val; public function __construct($val) { $this->val = $val; } public function __destruct() { $this->vessel = $this; } public function __toString() { return $this->val; } } $answer = new zombie("42"); $answer->vessel = &$answer; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer);

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)
8.3.60.0040.01118.68
8.3.50.0120.00922.05
8.3.40.0180.00318.63
8.3.30.0110.00419.08
8.3.20.0060.00820.34
8.3.10.0080.00020.54
8.3.00.0050.00519.50
8.2.180.0120.00616.88
8.2.170.0100.00722.96
8.2.160.0110.00320.39
8.2.150.0040.00424.18
8.2.140.0060.00624.66
8.2.130.0080.00026.16
8.2.120.0080.00022.24
8.2.110.0030.00621.01
8.2.100.0040.00817.97
8.2.90.0040.00419.27
8.2.80.0040.00417.97
8.2.70.0050.00317.75
8.2.60.0090.00018.16
8.2.50.0000.00818.10
8.2.40.0080.00018.03
8.2.30.0090.00019.50
8.2.20.0000.00717.59
8.2.10.0050.00318.00
8.2.00.0000.00817.61
8.1.280.0110.00725.92
8.1.270.0090.00023.97
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0030.00622.67
8.1.230.0000.01117.89
8.1.220.0000.00817.74
8.1.210.0050.00318.77
8.1.200.0040.00417.25
8.1.190.0000.00817.48
8.1.180.0090.00018.10
8.1.170.0030.00518.63
8.1.160.0070.00021.91
8.1.150.0030.00618.84
8.1.140.0050.00217.50
8.1.130.0000.00717.79
8.1.120.0030.00517.41
8.1.110.0040.00417.49
8.1.100.0070.00017.46
8.1.90.0030.00517.50
8.1.80.0040.00417.49
8.1.70.0070.00017.33
8.1.60.0000.00817.61
8.1.50.0030.00517.50
8.1.40.0060.00317.39
8.1.30.0060.00317.47
8.1.20.0030.00617.66
8.1.10.0070.00017.54
8.1.00.0070.00317.52
8.0.300.0070.00018.77
8.0.290.0050.00316.75
8.0.280.0030.00318.38
8.0.270.0000.00717.32
8.0.260.0000.00717.16
8.0.250.0070.00016.82
8.0.240.0060.00316.93
8.0.230.0030.00316.95
8.0.220.0000.00716.75
8.0.210.0030.00316.88
8.0.200.0000.00616.83
8.0.190.0070.00016.85
8.0.180.0070.00316.92
8.0.170.0050.00316.93
8.0.160.0030.00416.85
8.0.150.0000.00716.74
8.0.140.0000.00816.73
8.0.130.0000.00513.32
8.0.120.0000.00816.75
8.0.110.0070.00016.81
8.0.100.0040.00416.86
8.0.90.0000.00816.84
8.0.80.0080.00816.81
8.0.70.0040.00416.70
8.0.60.0070.00016.80
8.0.50.0040.00416.95
8.0.30.0110.01017.12
8.0.20.0120.00817.40
8.0.10.0040.00416.88
8.0.00.0050.01216.67
7.4.330.0050.00015.00
7.4.320.0000.00616.60
7.4.300.0030.00316.47
7.4.290.0000.00716.46
7.4.280.0040.00416.59
7.4.270.0030.00316.55
7.4.260.0030.00316.49
7.4.250.0030.00516.61
7.4.240.0060.00216.54
7.4.230.0070.00016.69
7.4.220.0140.00416.57
7.4.210.0070.00716.71
7.4.200.0030.00316.30
7.4.160.0080.00816.26
7.4.150.0090.00917.40
7.4.140.0080.01117.86
7.4.130.0030.01316.44
7.4.120.0080.00816.41
7.4.110.0060.01216.33
7.4.100.0110.00616.30
7.4.90.0180.00016.43
7.4.80.0120.00819.39
7.4.70.0090.00616.50
7.4.60.0100.00616.34
7.4.50.0040.00416.14
7.4.40.0100.00616.48
7.4.30.0120.00316.41
7.4.00.0090.00814.90
7.3.330.0030.00313.07
7.3.320.0000.00513.25
7.3.310.0030.00316.34
7.3.300.0020.00516.34
7.3.290.0070.01016.25
7.3.280.0060.00816.29
7.3.270.0160.00317.40
7.3.260.0060.01216.43
7.3.250.0140.00416.31
7.3.240.0120.00616.29
7.3.230.0030.01316.39
7.3.210.0030.01316.22
7.3.200.0140.00319.39
7.3.190.0040.01116.63
7.3.180.0030.01316.43
7.3.170.0120.00916.46
7.3.160.0060.00916.26
7.3.120.0070.01014.70
7.3.110.0160.00014.98
7.3.100.0100.00714.74
7.3.90.0120.00314.62
7.3.80.0090.00615.16
7.3.70.0070.00314.70
7.3.60.0040.01414.54
7.3.50.0110.00814.80
7.3.40.0090.00314.71
7.3.30.0100.00314.54
7.3.20.0030.00916.76
7.3.10.0100.00316.56
7.3.00.0020.01216.56
7.2.330.0170.00016.78
7.2.320.0030.01616.76
7.2.310.0120.00616.87
7.2.300.0140.00316.45
7.2.290.0040.01516.44
7.2.250.0040.01415.06
7.2.240.0070.00715.27
7.2.230.0030.01415.29
7.2.220.0070.00314.74
7.2.210.0070.00715.30
7.2.200.0000.01415.11
7.2.190.0000.01415.03
7.2.180.0040.01115.01
7.2.170.0060.00614.82
7.2.130.0050.00816.55
7.2.120.0060.01016.46
7.2.110.0030.01216.47
7.2.100.0120.00316.50
7.2.90.0150.00016.36
7.2.80.0120.00916.71
7.2.70.0110.00816.78
7.2.60.0080.01116.56
7.2.50.0190.01016.63
7.2.40.0180.00316.83
7.2.30.0090.01616.63
7.2.20.0130.01016.72
7.2.10.0150.00916.36
7.2.00.0150.00718.26
7.1.330.0030.01015.75
7.1.320.0000.01615.77
7.1.310.0030.01015.79
7.1.300.0100.00715.91
7.1.290.0070.01115.52
7.1.280.0100.00715.96
7.1.270.0080.00415.75
7.1.260.0070.00715.91
7.1.250.0090.00315.44
7.1.200.0060.00615.72
7.1.100.0030.00617.86
7.1.70.0090.00317.10
7.1.60.0030.02019.12
7.1.50.0140.01116.86
7.1.00.0000.07722.45
7.0.200.0000.00816.71
7.0.140.0000.07722.09
7.0.60.0200.05719.97
7.0.50.0070.08017.89
7.0.40.0000.08720.16
7.0.30.0670.05720.26
7.0.20.0370.07720.24
7.0.10.0370.06720.23
7.0.00.0030.08020.09
5.6.280.0030.07320.82
5.6.210.0100.07720.62
5.6.200.0030.04318.18
5.6.190.0100.04020.41
5.6.180.0230.08020.55
5.6.170.0270.06320.56
5.6.160.0030.04320.69
5.6.150.0070.08018.19
5.6.140.0070.07718.28
5.6.130.0100.03718.24
5.6.120.0170.08021.02
5.6.110.0100.08020.97
5.6.100.0000.04320.96
5.6.90.0030.08720.96
5.6.80.0070.05320.49
5.6.70.3270.04320.44
5.5.350.0030.08020.39
5.5.340.0030.08717.95
5.5.330.0070.05020.34
5.5.320.0200.07020.30
5.5.310.0270.05320.36
5.5.300.0100.03317.97
5.5.290.0100.07317.94
5.5.280.0200.07020.97
5.5.270.0130.07720.97
5.5.260.0100.08020.77
5.5.250.0070.04720.47
5.5.240.0070.03720.36
5.4.450.0400.04019.46
5.4.440.0370.04019.37
5.4.430.0200.04019.40
5.4.420.0270.05019.34
5.4.410.0130.04019.04
5.4.400.0500.03719.14
5.4.390.0200.04019.26
5.4.380.0530.06718.80
5.4.370.0370.05718.50
5.4.360.0230.05718.80
5.4.350.0300.06318.50
5.4.340.0270.05718.75
5.4.320.0030.03812.51
5.4.310.0060.04312.50
5.4.300.0030.04212.51
5.4.290.0090.03512.50
5.4.280.0090.03612.40
5.4.270.0060.03512.41
5.4.260.0100.03812.40
5.4.250.0060.03612.41
5.4.240.0070.03512.40
5.4.230.0070.03812.39
5.4.220.0060.04112.39
5.4.210.0040.04012.39
5.4.200.0070.04312.39
5.4.190.0050.03612.39
5.4.180.0050.03512.39
5.4.170.0010.04112.40
5.4.160.0070.03812.40
5.4.150.0080.03612.39
5.4.140.0040.03812.07
5.4.130.0060.04112.06
5.4.120.0080.03212.02
5.4.110.0090.03012.02
5.4.100.0070.03612.02
5.4.90.0020.03912.02
5.4.80.0050.03612.02
5.4.70.0050.03612.02
5.4.60.0040.03512.02
5.4.50.0030.03712.02
5.4.40.0060.03412.00
5.4.30.0030.03812.00
5.4.20.0060.03812.00
5.4.10.0070.03712.00
5.4.00.0030.03811.49
5.3.290.0140.03612.80
5.3.280.0100.04112.71
5.3.270.0060.03912.72
5.3.260.0080.04212.72
5.3.250.0100.04212.71
5.3.240.0080.03512.72
5.3.230.0050.03812.71
5.3.220.0060.03812.68
5.3.210.0070.04612.68
5.3.200.0100.03512.68
5.3.190.0080.03512.68
5.3.180.0050.03712.68
5.3.170.0040.03912.67
5.3.160.0060.03512.68
5.3.150.0040.03812.68
5.3.140.0050.03612.66
5.3.130.0060.03812.66
5.3.120.0080.03912.66
5.3.110.0080.04512.66
5.3.100.0060.03712.12
5.3.90.0060.04612.11
5.3.80.0050.03812.10
5.3.70.0030.04012.10
5.3.60.0040.03712.08
5.3.50.0060.03912.03
5.3.40.0050.03912.03
5.3.30.0060.04311.99
5.3.20.0030.03811.77
5.3.10.0050.03911.74
5.3.00.0060.04411.72
5.2.170.0040.0319.22
5.2.160.0050.0289.22
5.2.150.0050.0319.22
5.2.140.0040.0329.22
5.2.130.0050.0329.18
5.2.120.0030.0309.18
5.2.110.0080.0259.19
5.2.100.0050.0289.18
5.2.90.0090.0289.18
5.2.80.0050.0299.18
5.2.70.0060.0289.18
5.2.60.0030.0319.13
5.2.50.0080.0309.10
5.2.40.0040.0329.08
5.2.30.0040.0309.05
5.2.20.0070.0269.04
5.2.10.0030.0308.95
5.2.00.0040.0298.81
5.1.60.0040.0248.10
5.1.50.0040.0288.09
5.1.40.0080.0228.07
5.1.30.0040.0308.42
5.1.20.0060.0268.45
5.1.10.0050.0298.17
5.1.00.0020.0278.17
5.0.50.0050.0246.64
5.0.40.0060.0246.46
5.0.30.0050.0286.27
5.0.20.0050.0256.23
5.0.10.0010.0226.22
5.0.00.0040.0316.21
4.4.90.0030.0204.78
4.4.80.0030.0174.75
4.4.70.0030.0154.76
4.4.60.0030.0164.75
4.4.50.0030.0204.77
4.4.40.0030.0284.71
4.4.30.0010.0164.76
4.4.20.0020.0164.85
4.4.10.0010.0214.85
4.4.00.0020.0284.76
4.3.110.0060.0214.67
4.3.100.0020.0154.66
4.3.90.0030.0144.63
4.3.80.0050.0284.58
4.3.70.0050.0174.63
4.3.60.0050.0194.63
4.3.50.0020.0234.63
4.3.40.0030.0254.54
4.3.30.0010.0173.30
4.3.20.0030.0153.29
4.3.10.0030.0143.24
4.3.00.0000.02016.72

preferences:
44.41 ms | 401 KiB | 5 Q