3v4l.org

run code in 300+ PHP versions simultaneously
<?php function userland_func_get_arg($idx) { return isset(debug_backtrace()[1]['args'][$idx]) ? debug_backtrace()[1]['args'][$idx] : false; } function foo() { $a = func_get_arg(0); $a = 'bar'; } function bar() { $a = userland_func_get_arg(0); $a = 'bar'; } $foo = 'foo'; var_dump(foo(&$foo, 'bar')); var_dump($foo); $foo = 'foo'; var_dump(bar(&$foo, 'bar')); var_dump($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)
5.4.320.0060.03612.52
5.4.310.0050.03812.51
5.4.300.0090.03312.52
5.4.290.0070.03912.51
5.4.280.0060.03512.41
5.4.270.0080.03312.41
5.4.260.0050.03812.41
5.4.250.0040.04012.41
5.4.240.0020.04412.41
5.4.230.0080.03512.41
5.4.220.0050.03612.41
5.4.210.0050.03512.41
5.4.200.0080.03412.41
5.4.190.0010.04012.40
5.4.180.0070.03412.40
5.4.170.0050.03812.41
5.4.160.0100.03012.40
5.4.150.0070.03612.40
5.4.140.0090.03612.08
5.4.130.0080.03312.07
5.4.120.0030.03812.04
5.4.110.0040.03712.03
5.4.100.0040.03712.03
5.4.90.0040.04412.02
5.4.80.0020.04512.03
5.4.70.0070.03212.02
5.4.60.0050.04012.02
5.4.50.0080.03812.02
5.4.40.0050.03512.01
5.4.30.0080.04312.00
5.4.20.0040.03812.01
5.4.10.0060.03412.01
5.4.00.0050.03611.50
5.3.290.0090.03612.80
5.3.280.0060.03812.70
5.3.270.0060.04112.73
5.3.260.0060.03912.72
5.3.250.0090.03412.71
5.3.240.0090.03612.72
5.3.230.0030.04112.71
5.3.220.0100.04112.68
5.3.210.0070.04512.68
5.3.200.0030.04712.68
5.3.190.0060.04212.68
5.3.180.0090.04212.67
5.3.170.0020.03912.67
5.3.160.0060.03712.67
5.3.150.0060.03712.67
5.3.140.0050.03712.66
5.3.130.0070.03712.66
5.3.120.0090.04812.66
5.3.110.0090.04212.66
5.3.100.0040.03812.12
5.3.90.0090.03312.10
5.3.80.0040.03812.09
5.3.70.0060.03512.09
5.3.60.0070.04012.08
5.3.50.0070.04012.02
5.3.40.0030.03912.02
5.3.30.0070.03311.98
5.3.20.0070.03411.76
5.3.10.0090.03411.73
5.3.00.0070.03611.71
5.2.170.0060.0329.21
5.2.160.0040.0299.21
5.2.150.0070.0329.21
5.2.140.0060.0339.21
5.2.130.0040.0299.16
5.2.120.0060.0329.17
5.2.110.0060.0309.18
5.2.100.0090.0259.17
5.2.90.0050.0299.17
5.2.80.0050.0309.17
5.2.70.0050.0309.17
5.2.60.0090.0319.12
5.2.50.0040.0309.09
5.2.40.0040.0299.06
5.2.30.0080.0269.05
5.2.20.0050.0279.04
5.2.10.0020.0318.95
5.2.00.0070.0268.80
5.1.60.0050.0268.09
5.1.50.0070.0238.08
5.1.40.0050.0258.06
5.1.30.0030.0298.42
5.1.20.0060.0268.43
5.1.10.0050.0258.16
5.1.00.0040.0268.16
5.0.50.0030.0216.63
5.0.40.0040.0196.49
5.0.30.0010.0346.30
5.0.20.0060.0176.28
5.0.10.0030.0206.25
5.0.00.0050.0286.25
4.4.90.0030.0154.78
4.4.80.0040.0144.76
4.4.70.0060.0134.76
4.4.60.0000.0184.76
4.4.50.0020.0174.77
4.4.40.0030.0254.71
4.4.30.0020.0164.75
4.4.20.0030.0194.85
4.4.10.0020.0174.85
4.4.00.0030.0254.75
4.3.110.0040.0154.67
4.3.100.0020.0154.67
4.3.90.0020.0154.63
4.3.80.0020.0284.58
4.3.70.0060.0124.63
4.3.60.0010.0164.63
4.3.50.0040.0144.63
4.3.40.0030.0244.53
4.3.30.0010.0173.30
4.3.20.0010.0173.29
4.3.10.0040.0163.24
4.3.00.0000.0407.09

preferences:
141.77 ms | 1394 KiB | 7 Q