3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array( 'a' => 'A', 'b' => 'B', 'c' => 'C'); var_dump($arr); foreach ($arr as &$val) { if ($val == 'B') { unset($val); } } var_dump($arr); foreach ($arr as &$val) { if ($val == 'B') { $val = 'X'; } } var_dump($arr);

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).
Note: hhvm uses a JIT which only kicks in after a few runs. Since we run scripts only once, hhvm always runs slower.

VersionSystem time (s)User time (s)Memory (MiB)
7.3.10.0070.00716.95
7.3.00.0120.00316.85
7.2.130.0070.00717.00
7.2.120.0030.01416.75
7.2.110.0030.00916.91
7.2.100.0090.00017.01
7.2.90.0000.01117.04
7.2.80.0090.00016.91
7.2.70.0000.01316.86
7.2.60.0030.01116.98
7.2.50.0050.00516.73
7.2.40.0090.00616.99
7.2.30.0040.00716.96
7.2.20.0070.00716.68
7.2.10.0080.00616.84
7.2.00.0090.00718.03
7.1.250.0080.00616.00
7.1.100.0040.00817.84
7.1.70.0000.00716.86
7.1.60.0090.00617.24
7.1.50.0060.01616.86
7.1.00.0000.08022.42
7.0.200.0030.01416.77
7.0.140.0070.07021.97
7.0.70.0870.04719.88
7.0.60.0770.07019.90
7.0.50.0900.06320.39
7.0.40.0070.04319.95
7.0.30.0100.09020.20
7.0.20.0100.06020.05
7.0.10.0070.09020.04
7.0.00.0100.08320.18
5.6.280.0000.07320.77
5.6.220.0130.05020.67
5.6.210.0070.09020.75
5.6.200.0130.07021.08
5.6.190.0130.07720.95
5.6.180.0030.07720.95
5.6.170.0130.07721.13
5.6.160.0130.07320.96
5.6.150.0030.07321.06
5.6.140.0200.07021.07
5.6.130.0130.07720.99
5.6.120.0230.06721.00
5.6.110.0030.06321.16
5.6.100.0230.07721.09
5.6.90.0100.08021.02
5.6.80.0030.06720.52
5.6.70.0070.08720.45
5.6.60.0030.08020.44
5.6.50.0000.09020.48
5.6.40.0100.08320.38
5.6.30.0070.08020.44
5.6.20.0070.07720.30
5.6.10.0100.07720.36
5.6.00.0100.07720.44
5.5.360.0070.08320.34
5.5.350.0070.07320.44
5.5.340.0070.08020.76
5.5.330.0030.08320.64
5.5.320.0070.08320.91
5.5.310.0200.07020.83
5.5.300.0130.07320.88
5.5.290.0030.08720.92
5.5.280.0070.09020.91
5.5.270.0070.09020.90
5.5.260.0070.08720.72
5.5.250.0070.08720.70
5.5.240.0000.07320.27
5.5.230.0130.07720.30
5.5.220.0030.08020.29
5.5.210.0070.06720.16
5.5.200.0070.08720.27
5.5.190.0130.08020.14
5.5.180.0070.08020.27
5.5.160.0000.06320.25
5.5.150.0030.08320.17
5.5.140.0030.05720.17
5.5.130.0100.08020.18
5.5.120.0130.06720.17
5.5.110.0100.08020.23
5.5.100.0100.07720.02
5.5.90.0130.06320.14
5.5.80.0100.07720.16
5.5.70.0070.08019.96
5.5.60.0100.07320.08
5.5.50.0130.04320.05
5.5.40.0130.07719.99
5.5.30.0070.08019.93
5.5.20.0070.07320.04
5.5.10.0100.07720.00
5.5.00.0100.07320.12
5.4.450.0030.05019.29
5.4.440.0100.05319.47
5.4.430.0130.07719.44
5.4.420.0100.07719.36
5.4.410.0070.08019.00
5.4.400.0100.07719.03
5.4.390.0100.07018.90
5.4.380.0070.07719.14
5.4.370.0070.05018.95
5.4.360.0130.07719.09
5.4.350.0070.07719.07
5.4.340.0170.06719.03
5.4.320.0100.06018.96
5.4.310.0070.06319.03
5.4.300.0070.05319.05
5.4.290.0130.07719.14
5.4.280.0100.07718.80
5.4.270.0000.06718.78
5.4.260.0130.07019.22
5.4.250.0030.05319.05
5.4.240.0030.06019.13
5.4.230.0100.05319.08
5.4.220.0100.08019.11
5.4.210.0100.07318.80
5.4.200.0100.07018.93
5.4.190.0070.07318.97
5.4.180.0030.08018.95
5.4.170.0030.04019.08
5.4.160.0000.04719.04
5.4.150.0000.04319.03
5.4.140.0070.07716.37
5.4.130.0100.07016.12
5.4.120.0130.06716.27
5.4.110.0100.05316.43
5.4.100.0100.07316.21
5.4.90.0130.05016.36
5.4.80.0070.05016.41
5.4.70.0100.04316.19
5.4.60.0070.07716.20
5.4.50.0100.05016.42
5.4.40.0070.07716.40
5.4.30.0030.07716.32
5.4.20.0070.07316.38
5.4.10.0100.05716.41
5.4.00.0130.06715.71
5.3.290.0030.05014.59
5.3.280.0100.05714.58
5.3.270.0100.04714.59
5.3.260.0100.08014.59
5.3.250.0100.03714.56
5.3.240.0070.07714.43
5.3.230.0030.06714.58
5.3.220.0100.07014.54
5.3.210.0070.05714.52
5.3.200.0070.08014.51
5.3.190.0100.07714.40
5.3.180.0000.05314.55
5.3.170.0100.04314.39
5.3.160.0100.07314.54
5.3.150.0170.07314.55
5.3.140.0030.04714.50
5.3.130.0130.06714.49
5.3.120.0130.07014.46
5.3.110.0030.05714.54
5.3.100.0100.07313.99
5.3.90.0030.08313.87
5.3.80.0100.07313.99
5.3.70.0070.05313.95
5.3.60.0070.07314.01
5.3.50.0100.07313.90
5.3.40.0070.07713.81
5.3.30.0070.06713.79
5.3.20.0070.07013.68
5.3.10.0100.06713.43
5.3.00.0070.07013.54
5.2.170.0070.05011.10
5.2.160.0030.06310.96
5.2.150.0030.06311.14
5.2.140.0070.04010.93
5.2.130.0100.05711.12
5.2.120.0070.05711.09
5.2.110.0000.06711.06
5.2.100.0030.06311.13
5.2.90.0070.06311.14
5.2.80.0030.04711.13
5.2.70.0000.05011.04
5.2.60.0130.05710.89
5.2.50.0000.06310.89
5.2.40.0030.06710.99
5.2.30.0130.05010.89
5.2.20.0030.05310.89
5.2.10.0030.06710.89
5.2.00.0030.06310.89
5.1.60.0030.05310.89
5.1.50.0070.04010.89
5.1.40.0070.05010.89
5.1.30.0100.04710.89
5.1.20.0070.06010.89
5.1.10.0000.05710.89
5.1.00.0070.05710.89
5.0.50.0000.05010.89
5.0.40.0100.03710.89
5.0.30.0000.06310.89
5.0.20.0070.04010.89
5.0.10.0030.03310.89
5.0.00.0030.03710.89
4.4.90.0070.02710.89
4.4.80.0030.02010.89
4.4.70.0030.03710.89
4.4.60.0070.03010.89
4.4.50.0030.03310.89
4.4.40.0000.04010.89
4.4.30.0030.03310.89
4.4.20.0030.03310.89
4.4.10.0000.02710.89
4.4.00.0000.06010.89
4.3.110.0030.02310.89
4.3.100.0030.03010.89
4.3.90.0030.03310.89
4.3.80.0070.05010.89
4.3.70.0030.03010.89
4.3.60.0030.03310.89
4.3.50.0030.03710.89
4.3.40.0000.05310.89
4.3.30.0100.02710.89
4.3.20.0000.03710.89
4.3.10.0000.04010.89
4.3.00.0000.03710.89