3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array = ['a_a' => '2', 'a_b' => '333', 'c_c' => '123']; function flattenToMultiDimensional(array $array, $delimiter = '.') { $result = []; foreach ($array as $notations => $value) { // extract keys $keys = explode($delimiter, $notations); // reverse keys for assignments $keys = array_reverse($keys); // set initial value $lastVal = $value; foreach ($keys as $key) { // wrap value with key over each iteration $lastVal = [ $key => $lastVal ]; } // merge result $result = array_merge_recursive($result, $lastVal); } return $result; } var_export(flattenToMultiDimensional($array, '_'));

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)
8.5.30.0100.00620.14
8.5.20.0120.00619.40
8.5.10.0130.00418.49
8.5.00.0120.00919.92
8.4.180.0130.00919.46
8.4.170.0100.01223.88
8.4.160.0140.00720.52
8.4.150.0060.00716.83
8.4.140.0090.01217.45
8.4.130.0130.00617.66
8.4.120.0120.00620.66
8.4.110.0100.01222.43
8.4.100.0100.01217.77
8.4.90.0060.00418.89
8.4.80.0120.00817.84
8.4.70.0050.00317.86
8.4.60.0120.01218.82
8.4.50.0080.01119.57
8.4.40.0130.00319.68
8.4.30.0160.00320.50
8.4.20.0130.00719.52
8.4.10.0130.00620.11
8.3.300.0120.00820.75
8.3.290.0120.00820.72
8.3.280.0120.00818.41
8.3.270.0120.00716.67
8.3.260.0110.00916.60
8.3.250.0110.00818.77
8.3.240.0040.00416.82
8.3.230.0110.00716.62
8.3.220.0110.00817.23
8.3.210.0130.00616.72
8.3.200.0070.00216.73
8.3.190.0090.00917.09
8.3.180.0070.00716.69
8.3.170.0080.00019.09
8.3.160.0040.01516.50
8.3.150.0150.00418.88
8.3.140.0120.00316.58
8.3.130.0040.00418.36
8.3.120.0100.00619.11
8.3.110.0040.00420.94
8.3.100.0000.00916.63
8.3.90.0000.00826.77
8.3.80.0000.01116.88
8.3.70.0120.00616.75
8.3.60.0110.00416.63
8.3.50.0040.01219.99
8.3.40.0160.00018.84
8.3.30.0000.01419.02
8.3.20.0060.00324.18
8.3.10.0080.00024.66
8.3.00.0040.00426.16
8.2.300.0110.01422.25
8.2.290.0110.00920.63
8.2.280.0100.01018.63
8.2.270.0110.00717.08
8.2.260.0120.00618.41
8.2.250.0050.00316.57
8.2.240.0030.00616.77
8.2.230.0070.00022.58
8.2.220.0080.00324.06
8.2.210.0000.01426.77
8.2.200.0090.00016.88
8.2.190.0070.00718.11
8.2.180.0000.01525.92
8.2.170.0000.01418.91
8.2.160.0050.00822.96
8.2.150.0000.00725.66
8.2.140.0000.00724.66
8.2.130.0040.00426.16
8.2.120.0080.00026.16
8.2.110.0100.00019.30
8.2.100.0060.00618.09
8.2.90.0000.00817.63
8.2.80.0000.00818.75
8.2.70.0000.00817.50
8.2.60.0040.00417.63
8.2.50.0050.00317.98
8.2.40.0100.00017.72
8.2.30.0070.00018.04
8.2.20.0040.00420.35
8.2.10.0000.00718.13
8.2.00.0040.00419.42
8.1.340.0090.01117.69
8.1.330.0090.00922.18
8.1.320.0130.00616.31
8.1.310.0140.00416.68
8.1.300.0060.00316.08
8.1.290.0060.00330.84
8.1.280.0060.00925.92
8.1.270.0120.00323.99
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0030.00622.59
8.1.230.0000.01120.88
8.1.220.0030.00518.59
8.1.210.0050.00319.07
8.1.200.0030.00617.36
8.1.190.0080.00017.13
8.1.180.0050.00318.10
8.1.170.0000.00717.66
8.1.160.0040.00418.88
8.1.150.0070.00418.65
8.1.140.0000.00717.46
8.1.130.0000.00818.86
8.1.120.0080.00017.48
8.1.110.0040.00417.34
8.1.100.0040.00417.48
8.1.90.0000.00717.35
8.1.80.0070.00017.52
8.1.70.0000.00717.35
8.1.60.0240.00317.59
8.1.50.0140.01117.54
8.1.40.0270.00017.34
8.1.30.0140.00917.58
8.1.20.0140.01217.71
8.1.10.0210.00617.45
8.1.00.0240.00017.39
8.0.300.0050.00319.70
8.0.290.0040.00416.75
8.0.280.0000.00720.24
8.0.270.0030.00316.70
8.0.260.0030.00318.44
8.0.250.0040.00416.96
8.0.240.0000.00716.95
8.0.230.0000.00716.96
8.0.220.0030.00316.80
8.0.210.0070.00016.85
8.0.200.0030.00316.92
8.0.190.0090.01016.91
8.0.180.0180.00516.91
8.0.170.0180.00416.89
8.0.160.0130.01016.82
8.0.150.0110.01116.74
8.0.140.0170.00416.85
8.0.130.0170.00316.82
8.0.120.0210.00016.82
8.0.110.0200.00016.74
8.0.100.0160.00416.78
8.0.90.0140.00716.90
8.0.80.0130.00916.85
8.0.70.0160.00416.69
8.0.60.0120.00616.92
8.0.50.0190.00216.75
8.0.30.0170.00316.88
8.0.20.0110.00816.96
8.0.10.0140.00716.86
7.4.330.0030.00315.55
7.4.320.0090.00016.46
7.4.300.0000.00616.50
7.4.290.0190.00316.61
7.4.280.0170.00516.53
7.4.270.0130.01016.53
7.4.260.0160.00616.59
7.4.250.0150.00916.54
7.4.240.0250.00016.50
7.4.230.0220.00416.52
7.4.220.0170.00316.60
7.4.210.0120.00916.45
7.4.200.0110.01116.54
7.4.190.0200.00016.42
7.4.180.0200.00016.47
7.4.160.0140.00716.41
7.4.150.0160.00316.37
7.4.140.0150.00516.55
7.4.130.0140.00516.41
7.4.120.0130.00616.32
7.4.110.0080.01116.47
7.4.100.0140.00616.52
7.4.90.0170.00316.42
7.4.80.0130.00616.31
7.4.70.0120.00616.30
7.4.60.0160.00516.37
7.4.50.0160.00416.25
7.4.40.0160.00416.34
7.4.30.0180.00316.58
7.4.20.0150.00416.46
7.4.10.0180.00316.46
7.4.00.0160.00516.49

preferences:
64.37 ms | 1254 KiB | 5 Q