3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'foo'; $temporaryA = $a; $a = md5('value for finding ' . uniqid()); $variables = get_defined_vars(); $key = array_search($a, $variables); var_dump($key); $a = $temporaryA; unset ($temporaryA);

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)
7.2.00.0030.00919.41
7.1.70.0000.00717.03
7.1.60.0090.01519.70
7.1.50.0280.00634.51
7.1.00.0100.07022.44
7.0.200.0000.01016.82
7.0.140.0030.07322.08
7.0.60.0130.07719.93
7.0.50.0070.04017.79
7.0.40.0030.09020.02
7.0.30.0270.07720.01
7.0.20.0300.05020.16
7.0.10.0170.07020.30
7.0.00.0070.04020.08
5.6.280.0000.07321.03
5.6.210.0100.04320.76
5.6.200.0070.08718.14
5.6.190.0130.06720.49
5.6.180.0070.08320.62
5.6.170.0230.05020.48
5.6.160.0100.08020.49
5.6.150.0030.08718.11
5.6.140.0130.03718.12
5.6.130.0100.08318.12
5.6.120.0030.04321.11
5.6.110.0100.07321.10
5.6.100.0000.04321.04
5.6.90.0030.08320.96
5.6.80.0000.08320.50
5.5.350.0000.09320.48
5.5.340.0070.05018.02
5.5.330.0030.09320.14
5.5.320.0200.06320.27
5.5.310.0270.08320.18
5.5.300.0070.08317.87
5.5.290.0100.08017.95
5.5.280.0070.07020.75
5.5.270.0130.05320.97
5.5.260.0300.07320.75
5.5.250.0170.07320.60
5.5.240.0100.07720.22
5.4.450.0230.05043.77
5.4.440.1000.05719.45
5.4.430.0400.04737.16
5.4.420.0530.04033.66
5.4.410.0200.03733.63
5.4.400.0300.03333.62
5.4.390.0230.04333.61
5.4.380.0370.05318.66
5.4.370.0070.06718.70
5.4.360.0270.05318.69
5.4.350.0200.06018.61
5.4.340.0230.05318.50
5.4.320.0060.03612.45
5.4.310.0110.05012.45
5.4.300.0060.03612.45
5.4.290.0060.03612.45
5.4.280.0090.03712.34
5.4.270.0080.03812.34
5.4.260.0100.03812.34
5.4.250.0050.03912.34
5.4.240.0060.03712.34
5.4.230.0090.03412.34
5.4.220.0120.03312.34
5.4.210.0060.04112.34
5.4.200.0080.03412.34
5.4.190.0090.03412.33
5.4.180.0070.03512.33
5.4.170.0070.03412.34
5.4.160.0030.03812.34
5.4.150.0020.03912.34
5.4.140.0080.03412.02
5.4.130.0080.03712.01
5.4.120.0090.03911.97
5.4.110.0080.03811.96
5.4.100.0060.03411.96
5.4.90.0090.03511.96
5.4.80.0050.04011.96
5.4.70.0050.03811.96
5.4.60.0060.03411.96
5.4.50.0070.03811.96
5.4.40.0040.03711.95
5.4.30.0060.04911.95
5.4.20.0080.03311.95
5.4.10.0070.03411.94
5.4.00.0030.03911.44
5.3.290.0050.04112.80
5.3.280.0100.04012.71
5.3.270.0080.03812.72
5.3.260.0100.03912.72
5.3.250.0110.03912.72
5.3.240.0070.03512.72
5.3.230.0110.04112.70
5.3.220.0080.03612.68
5.3.210.0070.04012.68
5.3.200.0060.03812.68
5.3.190.0080.04312.68
5.3.180.0070.03512.67
5.3.170.0090.04112.67
5.3.160.0110.03112.67
5.3.150.0060.03812.68
5.3.140.0050.03912.66
5.3.130.0070.03712.66
5.3.120.0130.03112.66
5.3.110.0050.04012.66
5.3.100.0100.03312.12
5.3.90.0090.03312.09
5.3.80.0050.03712.07
5.3.70.0050.03712.08
5.3.60.0080.03812.06
5.3.50.0090.03912.00
5.3.40.0060.03712.00
5.3.30.0060.03611.95
5.3.20.0060.03511.72
5.3.10.0070.03811.70
5.3.00.0040.04111.68
5.2.170.0080.0319.18
5.2.160.0050.0299.18
5.2.150.0040.0319.18
5.2.140.0050.0299.17
5.2.130.0050.0309.14
5.2.120.0030.0349.14
5.2.110.0070.0369.14
5.2.100.0040.0309.14
5.2.90.0040.0309.14
5.2.80.0090.0349.14
5.2.70.0040.0419.14
5.2.60.0040.0329.09
5.2.50.0040.0329.06
5.2.40.0080.0269.04
5.2.30.0030.0309.01
5.2.20.0030.0299.03
5.2.10.0010.0328.93
5.2.00.0030.0318.79
5.1.60.0020.0268.08
5.1.50.0040.0258.07
5.1.40.0050.0238.06
5.1.30.0050.0328.41
5.1.20.0100.0248.43
5.1.10.0070.0238.15
5.1.00.0050.0288.15
5.0.50.0030.0216.63
5.0.40.0020.0206.49
5.0.30.0050.0296.30
5.0.20.0060.0166.30
5.0.10.0030.0206.27
5.0.00.0040.0306.25
4.4.90.0050.0134.78
4.4.80.0050.0134.76
4.4.70.0020.0174.76
4.4.60.0060.0184.76
4.4.50.0010.0214.77
4.4.40.0020.0264.70
4.4.30.0030.0154.76
4.4.20.0020.0164.84
4.4.10.0020.0164.85
4.4.00.0020.0254.76
4.3.110.0030.0184.67
4.3.100.0030.0194.66
4.3.90.0030.0144.63
4.3.80.0020.0244.58
4.3.70.0050.0124.63
4.3.60.0030.0144.63
4.3.50.0030.0154.63
4.3.40.0040.0234.54
4.3.30.0020.0163.32
4.3.20.0020.0163.30
4.3.10.0030.0143.26
4.3.00.0000.02033.61

preferences:
27.3 ms | 401 KiB | 5 Q