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, $variables, true); var_dump($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)
7.4.10.0090.00315.10
7.4.00.0120.00614.96
7.3.130.0160.00314.68
7.3.120.0070.01014.73
7.3.110.0090.00614.46
7.3.100.0000.01514.73
7.3.90.0060.00614.57
7.3.80.0100.00314.98
7.3.70.0040.00414.48
7.3.60.0060.00914.48
7.3.50.0030.01014.68
7.3.40.0040.01414.78
7.3.30.0110.00414.39
7.3.20.0070.00716.59
7.3.10.0000.01616.54
7.3.00.0030.00716.66
7.2.260.0070.01115.00
7.2.250.0030.01315.23
7.2.240.0040.01114.86
7.2.230.0130.00015.12
7.2.220.0060.00915.10
7.2.210.0060.01014.91
7.2.200.0040.01114.66
7.2.190.0120.00615.06
7.2.180.0110.00415.10
7.2.170.0040.01114.66
7.2.160.0030.00714.74
7.2.150.0040.01216.78
7.2.140.0080.00416.61
7.2.130.0070.01017.07
7.2.120.0000.01316.95
7.2.110.0090.00617.00
7.2.100.0030.01316.84
7.2.90.0030.01316.79
7.2.80.0100.00316.84
7.2.70.0000.01416.80
7.2.60.0030.00916.85
7.2.50.0030.01216.73
7.2.40.0040.01116.95
7.2.30.0060.00616.98
7.2.20.0000.01916.96
7.2.10.0030.01416.79
7.2.00.0040.00416.88
7.1.330.0050.00915.87
7.1.320.0060.01215.73
7.1.310.0040.00815.57
7.1.300.0050.00515.83
7.1.290.0040.01115.82
7.1.280.0070.00715.66
7.1.270.0070.00715.45
7.1.260.0080.00815.56
7.1.250.0070.00715.99
7.1.240.0070.00716.01
7.1.230.0060.00815.75
7.1.220.0060.00315.78
7.1.210.0100.00715.53
7.1.200.0060.00616.02
7.1.190.0060.00315.83
7.1.180.0070.00715.68
7.1.170.0090.00615.91
7.1.160.0060.00615.88
7.1.150.0090.00015.97
7.1.140.0060.00615.71
7.1.130.0130.00015.42
7.1.120.0000.00915.87
7.1.110.0040.01115.72
7.1.100.0000.01015.60
7.1.90.0070.00316.00
7.1.80.0000.01115.97
7.1.70.0070.00516.51
7.1.60.0050.01417.68
7.1.50.0120.00825.42
7.1.40.0070.00316.02
7.1.30.0000.01215.72
7.1.20.0070.00715.83
7.1.10.0100.00315.62
7.1.00.0050.04618.93
7.0.330.0080.00815.18
7.0.320.0060.00615.43
7.0.310.0040.01215.12
7.0.300.0060.00615.44
7.0.290.0100.00715.41
7.0.280.0030.00715.39
7.0.270.0030.01315.35
7.0.260.0030.00915.34
7.0.250.0140.00015.59
7.0.240.0000.01215.31
7.0.230.0080.00015.33
7.0.220.0090.00315.51
7.0.210.0030.01215.41
7.0.200.0060.00716.13
7.0.190.0000.00815.45
7.0.180.0080.00315.59
7.0.170.0060.00615.44
7.0.160.0060.00315.48
7.0.150.0080.00815.52
7.0.140.0070.03318.68
7.0.130.0000.00815.57
7.0.120.0030.01115.52
7.0.110.0060.00915.60
7.0.100.0100.00715.45
7.0.90.0030.01015.60
7.0.80.0100.00315.51
7.0.70.0070.00415.10
7.0.60.0060.03617.75
7.0.50.0030.02516.67
7.0.40.0060.03616.66
7.0.30.0200.03016.82
7.0.20.0140.02216.78
7.0.10.0060.02516.81
7.0.00.0070.04016.71
5.6.400.0040.00413.84
5.6.390.0060.00913.98
5.6.380.0040.01114.45
5.6.370.0040.00814.27
5.6.360.0110.00714.20
5.6.350.0040.00813.91
5.6.340.0060.00614.38
5.6.330.0060.00614.25
5.6.320.0070.00714.38
5.6.310.0030.00613.97
5.6.300.0000.01314.41
5.6.290.0030.00614.15
5.6.280.0060.04317.56
5.6.270.0050.00514.27
5.6.260.0120.00314.43
5.6.250.0000.01014.54
5.6.240.0040.01014.20
5.6.230.0040.01114.38
5.6.220.0120.00314.14
5.6.210.0040.03317.39
5.6.200.0020.04016.16
5.6.190.0070.02517.35
5.6.180.2070.02717.39
5.6.170.0220.03817.35
5.6.160.0140.03717.36
5.6.150.0070.04516.11
5.6.140.0110.02816.27
5.6.130.0070.03716.16
5.6.120.0030.02617.64
5.6.110.0050.03317.66
5.6.100.0100.04117.63
5.6.90.0120.03317.55
5.6.80.0060.02117.34
5.6.70.1620.02317.47
5.6.60.0040.00413.93
5.6.50.0060.00914.08
5.6.40.0030.01014.07
5.6.30.0060.00613.95
5.6.20.0000.01113.88
5.6.10.0030.01014.39
5.6.00.0060.00614.20
5.5.380.0070.00714.04
5.5.370.0090.00313.97
5.5.360.0060.00814.20
5.5.350.0110.04217.08
5.5.340.0010.03615.90
5.5.330.0090.04417.10
5.5.320.0130.02517.11
5.5.310.0150.04217.15
5.5.300.0050.02815.88
5.5.290.0040.04415.89
5.5.280.0120.02417.43
5.5.270.0120.03917.38
5.5.260.0050.04717.43
5.5.250.0030.04917.29
5.5.240.0120.02816.88
5.5.230.0000.01113.76
5.5.220.0060.00613.79
5.5.210.0030.01314.03
5.5.200.0120.00013.78
5.5.190.0070.00713.99
5.5.180.0060.00613.68
5.5.170.0070.01013.82
5.5.160.0060.00614.18
5.5.150.0060.00313.94
5.5.140.0060.00613.85
5.5.130.0100.00313.91
5.5.120.0090.00414.05
5.5.110.0040.00413.96
5.5.100.0070.00714.14
5.5.90.0080.00514.20
5.5.80.0070.00713.96
5.5.70.0040.00713.81
5.5.60.0000.01014.16
5.5.50.0040.00414.25
5.5.40.0090.00614.16
5.5.30.0030.00914.20
5.5.20.0090.00314.06
5.5.10.0000.01514.12
5.5.00.0000.01113.75
5.4.450.0150.02227.37
5.4.440.0170.01827.25
5.4.430.0100.02524.07
5.4.420.0230.02322.32
5.4.410.0150.02422.28
5.4.400.0150.01622.13
5.4.390.0370.01522.15
5.4.380.0190.02914.59
5.4.370.0140.03014.64
5.4.360.0130.02614.78
5.4.350.0150.02714.59
5.4.340.0070.03714.86
5.4.330.0000.01210.76
5.4.320.0020.02411.67
5.4.310.0050.02211.66
5.4.300.0050.02111.59
5.4.290.0070.02311.67
5.4.280.0060.02311.58
5.4.270.0070.01911.60
5.4.260.0080.02211.63
5.4.250.0030.02411.54
5.4.240.0080.02011.58
5.4.230.0060.02011.57
5.4.220.0050.02111.61
5.4.210.0060.02411.45
5.4.200.0060.02211.59
5.4.190.0040.02111.40
5.4.180.0050.02111.61
5.4.170.0040.02311.53
5.4.160.0050.02111.60
5.4.150.0040.02211.54
5.4.140.0050.02511.47
5.4.130.0100.02011.44
5.4.120.0040.02311.38
5.4.110.0050.02111.39
5.4.100.0040.02111.45
5.4.90.0040.02311.45
5.4.80.0050.02211.49
5.4.70.0060.02211.51
5.4.60.0090.01811.40
5.4.50.0020.02411.43
5.4.40.0050.02111.35
5.4.30.0030.02111.38
5.4.20.0020.02311.40
5.4.10.0020.02411.51
5.4.00.0060.02111.14
5.3.290.0030.02311.62
5.3.280.0070.01911.54
5.3.270.0050.02211.51
5.3.260.0050.02011.58
5.3.250.0070.02311.53
5.3.240.0050.02311.52
5.3.230.0030.02511.56
5.3.220.0080.01911.54
5.3.210.0050.02111.47
5.3.200.0050.02011.34
5.3.190.0040.02311.46
5.3.180.0050.01911.63
5.3.170.0100.02311.59
5.3.160.0060.02511.58
5.3.150.0070.02311.60
5.3.140.0070.02211.49
5.3.130.0100.02211.42
5.3.120.0040.02511.60
5.3.110.0070.02111.56
5.3.100.0070.02211.24
5.3.90.0070.02211.25
5.3.80.0060.02211.15
5.3.70.0020.02211.19
5.3.60.0070.01911.15
5.3.50.0040.02111.05
5.3.40.0040.02311.16
5.3.30.0060.01811.18
5.3.20.0050.02010.90
5.3.10.0070.02210.96
5.3.00.0080.01910.87
5.2.170.0050.0339.18
5.2.160.0070.0329.18
5.2.150.0030.0329.18
5.2.140.0070.0369.18
5.2.130.0040.0299.14
5.2.120.0100.0269.14
5.2.110.0050.0319.14
5.2.100.0060.0289.14
5.2.90.0020.0329.14
5.2.80.0040.0319.14
5.2.70.0050.0319.14
5.2.60.0050.0389.09
5.2.50.0040.0299.06
5.2.40.0060.0279.03
5.2.30.0040.0319.01
5.2.20.0050.0289.03
5.2.10.0050.0278.94
5.2.00.0040.0298.79
5.1.60.0050.0238.08
5.1.50.0040.0388.07
5.1.40.0080.0258.06
5.1.30.0050.0258.41
5.1.20.0090.0258.43
5.1.10.0040.0328.15
5.1.00.0040.0278.15
5.0.50.0030.0206.63
5.0.40.0050.0226.49
5.0.30.0020.0326.30
5.0.20.0030.0216.27
5.0.10.0020.0216.25
5.0.00.0030.0376.24
4.4.90.0030.0174.78
4.4.80.0040.0164.75
4.4.70.0040.0154.76
4.4.60.0020.0164.76
4.4.50.0020.0184.77
4.4.40.0020.0274.71
4.4.30.0030.0174.76
4.4.20.0040.0164.84
4.4.10.0020.0164.85
4.4.00.0030.0254.76
4.3.110.0030.0164.67
4.3.100.0020.0164.66
4.3.90.0070.0104.64
4.3.80.0020.0274.59
4.3.70.0010.0214.63
4.3.60.0020.0164.63
4.3.50.0020.0174.63
4.3.40.0030.0264.54
4.3.30.0000.0193.29
4.3.20.0040.0143.27
4.3.10.0030.0153.23
4.3.00.0100.01033.61

preferences:
40.16 ms | 401 KiB | 5 Q