3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 1 => [ 1 => [ 'anna', 'alice' ], 2 => [ 'bob', 'bartold' ] ], 2 => [ 1 => [ 'carol' ], 2 => [ 'david' ] ] ]; $result = []; foreach ($array as $key => $arr) { foreach ($arr as $k => $v) { $result[$k] = $v; } } var_dump($result);

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)
8.3.60.0090.00916.75
8.3.50.0120.00722.12
8.3.40.0070.00718.71
8.3.30.0100.00319.09
8.3.20.0000.00720.34
8.3.10.0050.00321.82
8.3.00.0040.00420.88
8.2.180.0100.01016.50
8.2.170.0090.00622.96
8.2.160.0080.01222.12
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0070.00026.16
8.2.120.0050.00319.77
8.2.110.0090.00020.23
8.2.100.0080.00418.03
8.2.90.0030.00519.23
8.2.80.0050.00317.97
8.2.70.0040.00417.63
8.2.60.0000.00817.93
8.2.50.0030.00618.07
8.2.40.0080.00019.88
8.2.30.0040.00418.23
8.2.20.0050.00217.63
8.2.10.0040.00418.18
8.2.00.0000.00817.63
8.1.280.0140.00725.92
8.1.270.0090.00020.79
8.1.260.0000.00726.35
8.1.250.0080.00028.09
8.1.240.0030.00624.02
8.1.230.0040.00818.94
8.1.220.0050.00317.79
8.1.210.0030.00518.77
8.1.200.0070.00317.35
8.1.190.0080.00017.35
8.1.180.0070.00018.10
8.1.170.0080.00018.50
8.1.160.0030.00321.92
8.1.150.0040.00418.91
8.1.140.0020.00517.51
8.1.130.0060.00317.78
8.1.120.0030.00317.41
8.1.110.0040.00417.44
8.1.100.0000.00817.48
8.1.90.0030.00617.45
8.1.80.0000.00717.41
8.1.70.0000.00717.36
8.1.60.0000.00817.57
8.1.50.0040.00417.54
8.1.40.0040.00417.48
8.1.30.0040.00417.55
8.1.20.0000.00717.46
8.1.10.0060.00317.47
8.1.00.0040.00417.29
8.0.300.0040.00418.77
8.0.290.0040.00416.63
8.0.280.0070.00018.45
8.0.270.0000.00717.25
8.0.260.0030.00317.23
8.0.250.0000.00716.91
8.0.240.0040.00416.99
8.0.230.0080.00016.99
8.0.220.0000.00716.93
8.0.210.0000.00816.78
8.0.200.0030.00316.91
8.0.190.0040.00416.99
8.0.180.0050.00316.94
8.0.170.0040.00416.84
8.0.160.0000.00716.95
8.0.150.0040.00416.91
8.0.140.0080.00016.89
8.0.130.0000.00713.34
8.0.120.0040.00416.77
8.0.110.0080.00016.79
8.0.100.0030.00516.75
8.0.90.0000.00716.73
8.0.80.0110.00316.82
8.0.70.0080.00016.94
8.0.60.0040.00416.77
8.0.50.0000.00716.85
8.0.30.0160.00717.10
8.0.20.0150.00517.40
8.0.10.0030.00516.95
8.0.00.0110.00816.82
7.4.330.0030.00315.16
7.4.320.0000.00616.54
7.4.300.0030.00316.45
7.4.290.0000.00716.43
7.4.280.0000.01116.49
7.4.270.0070.00016.61
7.4.260.0070.00016.60
7.4.250.0080.00016.43
7.4.240.0020.00616.65
7.4.230.0000.00716.41
7.4.220.0040.01516.58
7.4.210.0080.01016.49
7.4.200.0040.00416.47
7.4.160.0100.00616.58
7.4.150.0060.01217.40
7.4.140.0120.00617.86
7.4.130.0090.00916.49
7.4.120.0070.01016.53
7.4.110.0100.00716.29
7.4.100.0080.01416.46
7.4.90.0140.00316.49
7.4.80.0090.00616.42
7.4.70.0060.01616.40
7.4.60.0100.00716.57
7.4.50.0000.00816.51
7.4.40.0000.01616.57
7.4.30.0210.00016.60
7.4.00.0000.00814.68
7.3.330.0020.00213.20
7.3.320.0050.01013.23
7.3.310.0050.00216.46
7.3.300.0000.00816.32
7.3.290.0000.00716.23
7.3.280.0080.00916.35
7.3.270.0100.01017.40
7.3.260.0070.01016.54
7.3.250.0100.01016.59
7.3.240.0090.00616.28
7.3.230.0100.01316.39
7.3.210.0080.00816.36
7.3.200.0140.01419.39
7.3.190.0100.00516.32
7.3.180.0030.01716.34
7.3.170.0080.01116.64
7.3.160.0120.00916.54
7.3.120.0060.01014.80
7.3.110.0070.01014.62
7.3.100.0070.01114.61
7.3.90.0070.01014.80
7.3.80.0130.00014.75
7.3.70.0040.01114.43
7.3.60.0110.00014.71
7.3.50.0000.00914.93
7.3.40.0090.00614.83
7.3.30.0000.01014.70
7.3.20.0090.00016.58
7.3.10.0060.00316.44
7.3.00.0030.01016.76
7.2.330.0030.01516.53
7.2.320.0030.01316.55
7.2.310.0100.00716.61
7.2.300.0070.01416.32
7.2.290.0110.01216.62
7.2.240.0070.01015.18
7.2.230.0070.01014.89
7.2.220.0060.00915.02
7.2.210.0130.00015.13
7.2.200.0070.00715.02
7.2.190.0030.01014.80
7.2.180.0070.00715.01
7.2.170.0000.00915.05
7.2.160.0040.01215.05
7.2.150.0070.00716.73
7.2.140.0130.00616.89
7.2.130.0090.00316.64
7.2.120.0100.00716.81
7.2.110.0070.01116.87
7.2.100.0110.00016.67
7.2.90.0100.00316.54
7.2.80.0090.00616.91
7.2.70.0000.01216.81
7.2.60.0140.00516.75
7.2.50.0100.00316.65
7.2.40.0070.00316.96
7.2.30.0120.00316.64
7.2.20.0060.00616.91
7.2.10.0100.01016.98
7.2.00.0050.01018.19
7.1.330.0080.00415.88
7.1.320.0040.00415.80
7.1.310.0030.01415.41
7.1.300.0030.01015.48
7.1.290.0040.00815.75
7.1.280.0090.00615.47
7.1.270.0060.00815.79
7.1.260.0060.00315.86
7.1.250.0040.01116.00
7.1.200.0080.00315.93
7.1.100.0130.00717.61
7.1.70.0000.00717.29
7.1.60.0060.01217.38
7.1.50.0090.01216.91
7.1.00.0070.07322.31
7.0.200.0070.01016.80
7.0.140.0000.05021.97
7.0.60.0030.06320.00
7.0.50.0070.07717.89
7.0.40.0130.08320.21
7.0.30.0230.03720.30
7.0.20.0330.06720.19
7.0.10.0230.06020.17
7.0.00.0030.08720.20
5.6.280.0100.06720.92
5.6.210.0070.08320.59
5.6.200.0030.05318.10
5.6.190.0030.08320.28
5.6.180.0330.04320.56
5.6.170.0330.07020.63
5.6.160.0030.06720.41
5.6.150.0030.08018.17
5.6.140.0070.06018.22
5.6.130.0070.05318.17
5.6.120.0030.08320.99
5.6.110.0070.07321.04
5.6.100.0170.06320.98
5.6.90.0070.06020.87
5.6.80.0170.06720.35
5.5.350.0300.07320.35
5.5.340.0130.07717.91
5.5.330.0130.07720.43
5.5.320.0030.04720.32
5.5.310.0370.07020.41
5.5.300.0100.03717.87
5.5.290.0070.07317.98
5.5.280.0070.05020.84
5.5.270.0000.04720.78
5.5.260.0100.07020.93
5.5.250.0100.05020.70
5.5.240.0070.07720.07
5.4.450.0700.07319.57
5.4.440.0800.05719.27
5.4.430.0130.07019.53
5.4.420.0970.07019.59
5.4.410.0870.06019.36
5.4.400.0900.05019.18
5.4.390.0200.04318.56
5.4.380.0070.06318.52
5.4.370.0200.05018.65
5.4.360.0170.05018.60
5.4.350.0030.06718.56
5.4.340.0030.06718.58
5.4.320.0230.05018.77
5.4.310.0230.04318.73
5.4.300.0170.05018.64
5.4.290.0130.05318.68
5.4.280.0030.06318.56
5.4.270.0200.04718.45
5.4.260.0030.06018.51
5.4.250.0200.05018.77
5.4.240.0130.05318.73
5.4.230.0170.05018.76
5.4.220.0200.05318.68
5.4.210.0130.05318.48
5.4.200.0230.05016.51
5.4.190.0170.05318.59
5.4.180.0130.06718.47
5.4.170.0100.06018.44
5.4.160.0200.06318.56
5.4.150.0130.05318.70
5.4.140.0030.06016.16
5.4.130.0130.06316.07
5.4.120.0270.03716.30
5.4.110.0130.06316.36
5.4.100.0170.05016.16
5.4.90.0130.05016.24
5.4.80.0200.04716.20
5.4.70.0130.05316.13
5.4.60.0200.04316.10
5.4.50.0230.06016.28
5.4.40.0130.05316.16
5.4.30.0170.05316.33
5.4.20.0170.06716.23
5.4.10.0230.05016.05
5.4.00.0230.04315.62
5.3.290.0230.05714.74
5.3.280.0170.05714.59
5.3.270.0200.05014.57
5.3.260.0270.04314.70
5.3.250.0300.05714.70
5.3.240.0130.07314.61
5.3.230.0070.07014.67
5.3.220.0100.05714.50
5.3.210.0170.05314.57
5.3.200.0070.06314.55
5.3.190.0170.06314.55
5.3.180.0300.06014.65
5.3.170.0300.04014.59
5.3.160.0130.05314.55
5.3.150.0230.06314.49
5.3.140.0270.05014.52
5.3.130.0270.04714.55
5.3.120.0170.05714.48
5.3.110.0100.05714.55
5.3.100.0070.07014.02
5.3.90.0170.05013.93
5.3.80.0130.05013.95
5.3.70.0100.07314.00
5.3.60.0300.06313.99
5.3.50.0170.04713.92
5.3.40.0200.04714.04
5.3.30.0230.04313.98
5.3.20.0100.05313.78
5.3.10.0070.05313.76
5.3.00.0100.05713.61
5.2.170.0100.04311.12
5.2.160.0070.04311.10
5.2.150.0070.04711.09
5.2.140.0070.05011.14
5.2.130.0170.03711.16
5.2.120.0130.04711.11
5.2.110.0070.04711.09
5.2.100.0100.04711.04
5.2.90.0130.04011.16
5.2.80.0130.05011.10
5.2.70.0330.03711.02
5.2.60.0100.04711.20
5.2.50.0070.04711.05
5.2.40.0130.04010.98
5.2.30.0200.03310.98
5.2.20.0030.04710.94
5.2.10.0070.04310.97
5.2.00.0200.03010.69
5.1.60.0030.04010.01
5.1.50.0130.03010.02
5.1.40.0070.03710.01
5.1.30.0100.04310.39
5.1.20.0130.03710.32
5.1.10.0070.03710.18
5.1.00.0100.03710.22
5.0.50.0030.0308.59
5.0.40.0100.0308.46
5.0.30.0070.0538.25
5.0.20.0030.0308.32
5.0.10.0070.0308.35
5.0.00.0030.0438.18
4.4.90.0030.0235.91
4.4.80.0000.0275.85
4.4.70.0100.0205.84
4.4.60.0000.0275.81
4.4.50.0070.0205.86
4.4.40.0100.0305.87
4.4.30.0070.0305.91
4.4.20.0070.0235.95
4.4.10.0000.0275.93
4.4.00.0030.0475.96
4.3.110.0030.0235.83
4.3.100.0070.0205.83
4.3.90.0070.0275.82
4.3.80.0030.0435.79
4.3.70.0030.0235.77
4.3.60.0000.0275.77
4.3.50.0070.0205.78
4.3.40.0070.0335.76
4.3.30.0030.0234.90
4.3.20.0000.0274.90
4.3.10.0070.0204.90
4.3.00.0330.03014.62

preferences:
43.93 ms | 401 KiB | 5 Q