3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( 55 => array( 'ident' => 'test 1', 'depth' => 1, ), 77 => array( 'parent_id' => 55, 'ident' => 'test 2', 'depth' => 2, ), 109 => array( 'parent_id' => 77, 'ident' => 'test 3', 'depth' => 3, ), 78 => array( 'parent_id' => 55, 'ident' => 'test 4', 'depth' => 2, ), 25 => array( 'ident' => 'test 5', 'depth' => 1, ) ); function v1($array) { foreach ($array as $key => &$sub) { if (isset($sub['parent_id'])) { $array[$sub['parent_id']]['children'][$key] = &$sub; } } unset($sub); // unset the reference to make sure to not overwrite it later... // now remove the entries with parents foreach ($array as $key => $sub) { if (isset($sub['parent_id'])) unset($array[$key]); } return $array; } function find_by_key($key, $array) { foreach($array as $k => &$v) { if($key == $k) { return $v; } } foreach($array as $sub) { if(isset($sub['children']) && FALSE !== ($found = find_by_key($key, $sub['children']))) { return $found; } } return FALSE; } function v2($array) { $out = array(); foreach ($array as $key => $sub) { if(!isset($sub['parent_id'])) { $out[$key] = $sub; } else { $parent = find_by_key($sub['parent_id'], $out); $parent['children'][$key] = $sub; } } return $out; } //var_dump(v1($array)); var_dump(v2($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)
8.3.40.0070.00718.90
8.3.30.0110.00318.93
8.3.20.0030.00618.73
8.3.10.0060.00320.91
8.3.00.0040.00420.68
8.2.170.0040.01122.96
8.2.160.0070.00720.47
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0040.00426.16
8.2.120.0090.00420.94
8.2.110.0070.00322.20
8.2.100.0110.00017.84
8.2.90.0000.00817.91
8.2.80.0000.00917.97
8.2.70.0130.00017.50
8.2.60.0000.00818.16
8.2.50.0000.00818.07
8.2.40.0080.00018.09
8.2.30.0040.00421.27
8.2.20.0000.00717.86
8.2.10.0040.00417.89
8.2.00.0060.00317.86
8.1.270.0070.00023.99
8.1.260.0060.00326.35
8.1.250.0040.00428.09
8.1.240.0040.01822.05
8.1.230.0080.00420.83
8.1.220.0000.00817.80
8.1.210.0000.00819.04
8.1.200.0040.00417.35
8.1.190.0000.00717.53
8.1.180.0030.00618.10
8.1.170.0040.00418.46
8.1.160.0060.00318.96
8.1.150.0000.00718.59
8.1.140.0040.00417.39
8.1.130.0070.00017.77
8.1.120.0000.00717.48
8.1.110.0000.00817.47
8.1.100.0040.00417.37
8.1.90.0020.00517.53
8.1.80.0070.00017.52
8.1.70.0030.00317.50
8.1.60.0030.00617.60
8.1.50.0030.00617.53
8.1.40.0040.00417.50
8.1.30.0000.00817.57
8.1.20.0050.00317.57
8.1.10.0040.00417.42
8.1.00.0040.00417.46
8.0.300.0030.00619.90
8.0.290.0000.00717.05
8.0.280.0000.00918.48
8.0.270.0050.00216.90
8.0.260.0030.00316.80
8.0.250.0000.00717.04
8.0.240.0070.00016.90
8.0.230.0070.00017.06
8.0.220.0070.00016.99
8.0.210.0000.00716.85
8.0.200.0070.00016.85
8.0.190.0090.00017.01
8.0.180.0000.00716.97
8.0.170.0080.00016.94
8.0.160.0000.00716.79
8.0.150.0000.00716.92
8.0.140.0000.00816.71
8.0.130.0030.00313.34
8.0.120.0040.00416.78
8.0.110.0000.00716.79
8.0.100.0000.00716.98
8.0.90.0070.00016.94
8.0.80.0090.00616.91
8.0.70.0070.00016.82
8.0.60.0080.00016.80
8.0.50.0000.00716.88
8.0.30.0120.00817.27
8.0.20.0190.00417.40
8.0.10.0040.00417.00
8.0.00.0080.01316.70
7.4.330.0030.00316.85
7.4.320.0030.00316.53
7.4.300.0030.00316.43
7.4.290.0040.00416.52
7.4.280.0000.00716.43
7.4.270.0080.00016.62
7.4.260.0060.00313.25
7.4.250.0040.00416.45
7.4.240.0040.00416.51
7.4.230.0040.00416.37
7.4.220.0030.01416.34
7.4.210.0050.01116.56
7.4.200.0070.00016.67
7.4.190.0000.00716.48
7.4.160.0150.00316.66
7.4.150.0060.01317.40
7.4.140.0140.00717.86
7.4.130.0100.01216.62
7.4.120.0120.00516.60
7.4.110.0030.01416.59
7.4.100.0140.00916.40
7.4.90.0000.01716.58
7.4.80.0070.01019.39
7.4.70.0080.00916.51
7.4.60.0070.01016.54
7.4.50.0000.00516.48
7.4.40.0070.00722.77
7.4.30.0070.01116.47
7.4.00.0090.00615.02
7.3.330.0000.00613.33
7.3.320.0000.00713.30
7.3.310.0030.00316.23
7.3.300.0060.00016.23
7.3.290.0120.00616.35
7.3.280.0060.00816.30
7.3.270.0130.00417.40
7.3.260.0060.01418.24
7.3.250.0050.01316.53
7.3.240.0060.00916.71
7.3.230.0060.00916.44
7.3.210.0030.01416.54
7.3.200.0090.01219.39
7.3.190.0060.01116.64
7.3.180.0130.00416.58
7.3.170.0120.00916.53
7.3.160.0130.00416.60
7.3.120.0070.00714.58
7.2.330.0110.00716.76
7.2.320.0120.01116.54
7.2.310.0060.01616.63
7.2.300.0100.01316.85
7.2.290.0130.00316.75
7.2.00.0030.01319.44
7.1.100.0030.00617.91
7.1.70.0000.00817.09
7.1.60.0140.01119.08
7.1.50.0100.01734.98
7.1.00.0100.06322.48
7.0.200.0000.00716.57
7.0.140.0070.07022.00
7.0.100.0600.07719.94
7.0.90.0630.07019.86
7.0.80.0570.07719.96
7.0.70.0530.06719.97
7.0.60.0600.06320.00
7.0.50.0100.08720.38
7.0.40.0070.06320.15
7.0.30.0170.07320.08
7.0.20.0130.08020.13
7.0.10.0070.08320.17
7.0.00.0070.05020.13
5.6.280.0030.07320.86
5.6.250.0100.08320.60
5.6.240.0130.07020.64
5.6.230.0130.08020.70
5.6.220.0100.08020.74
5.6.210.0070.08020.63
5.6.200.0170.04721.15
5.6.190.0130.08321.02
5.6.180.0200.06721.07
5.6.170.0070.07721.14
5.6.160.0030.07721.11
5.6.150.0070.08321.12
5.6.140.0100.08321.04
5.6.130.0000.08320.96
5.6.120.0030.08321.03
5.6.110.0130.07321.04
5.6.100.0070.08720.92
5.6.90.0130.07721.10
5.6.80.0070.08020.55
5.6.70.0170.06720.49
5.6.60.0070.07320.44
5.6.50.0170.06720.53
5.6.40.0170.07020.31
5.6.30.0170.05320.32
5.6.20.0130.07020.40
5.6.10.0130.07720.47
5.6.00.0130.06320.40
5.5.380.0070.08320.38
5.5.370.0130.06720.52
5.5.360.0130.04320.35
5.5.350.0030.04720.38
5.5.340.0100.07720.79
5.5.330.0070.07720.90
5.5.320.0100.07720.93
5.5.310.0130.07320.90
5.5.300.0200.07020.83
5.5.290.0070.08320.89
5.5.280.0200.07720.64
5.5.270.0200.07320.89
5.5.260.0070.05720.92
5.5.250.0100.08320.58
5.5.240.0070.08320.23
5.5.230.0030.07020.31
5.5.220.0130.07320.30
5.5.210.0070.08020.28
5.5.200.0030.08320.12
5.5.190.0030.08020.22
5.5.180.0030.07720.23
5.5.160.0170.06720.14
5.5.150.0100.08020.14
5.5.140.0030.08020.16
5.5.130.0130.07320.25
5.5.120.0200.06320.25
5.5.110.0100.08020.15
5.5.100.0130.05320.00
5.5.90.0030.08319.98
5.5.80.0070.07319.98
5.5.70.0000.07720.05
5.5.60.0100.03720.06
5.5.50.0030.08019.97
5.5.40.0130.07720.09
5.5.30.0070.06720.15
5.5.20.0100.07720.14
5.5.10.0100.07720.07
5.5.00.0100.07720.04
5.4.450.0030.08019.21
5.4.440.0100.07319.50
5.4.430.0130.06319.35
5.4.420.0100.07319.47
5.4.410.0100.07319.34
5.4.400.0000.05019.04
5.4.390.0030.08018.85
5.4.380.0030.08019.03
5.4.370.0070.08318.88
5.4.360.0070.04719.14
5.4.350.0170.07018.85
5.4.340.0100.03718.91
5.4.320.0070.06319.21
5.4.310.0100.07018.90
5.4.300.0030.08019.05
5.4.290.0070.07719.12
5.4.280.0070.07719.04
5.4.270.0170.06719.16
5.4.260.0130.04019.23
5.4.250.0070.03318.87
5.4.240.0000.08018.88
5.4.230.0030.05719.18
5.4.220.0030.08019.18
5.4.210.0070.07719.04
5.4.200.0130.06319.04
5.4.190.0000.07318.84
5.4.180.0030.06719.02
5.4.170.0130.07019.12
5.4.160.0170.07019.11
5.4.150.0070.07019.14
5.4.140.0130.06716.40
5.4.130.0070.07016.53
5.4.120.0100.06716.25
5.4.110.0030.07716.52
5.4.100.0030.08016.40
5.4.90.0100.05016.45
5.4.80.0130.06716.41
5.4.70.0100.07016.51
5.4.60.0030.05016.41
5.4.50.0070.07016.33
5.4.40.0100.07016.42
5.4.30.0070.06016.30
5.4.20.0070.07016.38
5.4.10.0070.07716.46
5.4.00.0070.07015.86
5.3.290.0070.07014.61
5.3.280.0000.06314.64
5.3.270.0070.07314.64
5.3.260.0030.07714.75
5.3.250.0100.07714.60
5.3.240.0000.08014.69
5.3.230.0100.07014.57
5.3.220.0130.04714.51
5.3.210.0170.05314.64
5.3.200.0070.07714.56
5.3.190.0130.06314.63
5.3.180.0130.06314.63
5.3.170.0070.07014.68
5.3.160.0000.07014.52
5.3.150.0170.06714.50
5.3.140.0100.06714.71
5.3.130.0070.07014.63
5.3.120.0130.07314.62
5.3.110.0130.04714.55
5.3.100.0030.07714.08
5.3.90.0170.06013.93
5.3.80.0130.06713.94
5.3.70.0170.03313.92
5.3.60.0070.07313.95
5.3.50.0070.07313.89
5.3.40.0100.04714.03
5.3.30.0030.07013.93
5.3.20.0130.06313.77
5.3.10.0100.06313.66
5.3.00.0170.06313.66
5.2.170.0070.03711.15
5.2.160.0030.06311.05
5.2.150.0030.06711.30
5.2.140.0100.05711.21
5.2.130.0100.03311.03
5.2.120.0030.05711.03
5.2.110.0030.06711.17
5.2.100.0070.07311.17
5.2.90.0070.06011.00
5.2.80.0070.05011.17
5.2.70.0030.07010.98
5.2.60.0070.06010.93
5.2.50.0000.06311.15
5.2.40.0130.05010.88
5.2.30.0100.06010.98
5.2.20.0030.06011.04
5.2.10.0070.06010.86
5.2.00.0030.05710.69
5.1.60.0130.04010.56
5.1.50.0100.05010.56
5.1.40.0000.05710.56
5.1.30.0070.05310.56
5.1.20.0070.05310.56
5.1.10.0100.05010.56
5.1.00.0030.05710.56
5.0.50.0070.04310.56
5.0.40.0030.04310.56
5.0.30.0070.06310.56
5.0.20.0030.04710.56
5.0.10.0030.03310.56
5.0.00.0030.04310.56
4.4.90.0100.02310.56
4.4.80.0030.03310.56
4.4.70.0070.03310.56
4.4.60.0000.03710.56
4.4.50.0030.03310.56
4.4.40.0000.05010.56
4.4.30.0070.03010.56
4.4.20.0000.03310.56
4.4.10.0030.03010.56
4.4.00.0030.04310.56
4.3.110.0000.02710.56
4.3.100.0000.03710.56
4.3.90.0070.03010.56
4.3.80.0030.05310.56
4.3.70.0030.03710.56
4.3.60.0070.02710.56
4.3.50.0070.03310.56
4.3.40.0000.05710.56
4.3.30.0000.03710.56
4.3.20.0000.03710.56
4.3.10.0000.03710.56
4.3.00.0000.03010.56

preferences:
47.21 ms | 400 KiB | 5 Q