3v4l.org

run code in 300+ PHP versions simultaneously
<?php function buildTreeHelper(&$array, $currentLevel = 1) { $result = array(); $lastIndex = 0; while($pair = each($array)) { list(, $row) = $pair; $level = $row['level']; if ($level > $currentLevel) { $result[$lastIndex]['children'] = buildTreeHelper($array, $level); } else if ($level == $currentLevel) { $result[++$lastIndex] = $row; } else { prev($array); // shift back break; } } return $result; } function buildTree($array) { reset($array); return buildTreeHelper($array); } $array = [ ['level'=>1, 'name' => 'Root #1'], ['level'=>1, 'name' => 'Root #2'], ['level'=>2, 'name' => 'subroot 2-1'], ['level'=>3, 'name' => '__subroot 2-1/1'], ['level'=>3, 'name' => '__subroot 2-1/2'], ['level'=>4, 'name' => '__subroot 2-2/1'], ['level'=>2, 'name' => 'subroot 2-2'], ['level'=>2, 'name' => 'subroot 2-3'], ['level'=>1, 'name' => 'Root #3'] ]; $time = microtime(true); print_r(buildTree($array)); echo round(microtime(true) - $time, 10);

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)
7.4.00.0060.01014.99
7.3.120.0060.01314.76
7.3.110.0030.01614.61
7.3.100.0040.00714.58
7.3.90.0050.01114.97
7.3.80.0090.00714.79
7.3.70.0050.01114.83
7.3.60.0050.01014.86
7.3.50.0060.00514.87
7.3.40.0070.00714.84
7.3.30.0080.00614.82
7.3.20.0090.00616.60
7.3.10.0040.01016.52
7.3.00.0070.00716.59
7.2.250.0070.00915.00
7.2.240.0080.01115.04
7.2.230.0050.01015.04
7.2.220.0040.01115.16
7.2.210.0040.01115.12
7.2.200.0070.00915.07
7.2.190.0050.01115.02
7.2.180.0040.00914.98
7.2.170.0060.00715.04
7.2.00.0030.00919.52
7.1.330.0090.00615.98
7.1.320.0100.00315.82
7.1.310.0020.00815.75
7.1.300.0060.00815.78
7.1.290.0080.00415.59
7.1.280.0030.01215.72
7.1.270.0050.00615.69
7.1.260.0060.00815.80
7.1.70.0000.01017.20
7.1.60.0100.01319.17
7.1.50.0110.01516.78
7.1.00.0000.04022.33
7.0.200.0040.00416.64
7.0.140.0000.07722.01
7.0.110.0200.08319.97
7.0.100.0100.08020.02
7.0.90.0070.05719.85
7.0.80.0030.04320.08
7.0.70.0030.04320.02
7.0.60.0070.04319.91
7.0.50.0030.04020.16
7.0.40.0000.05720.25
7.0.30.0070.03720.15
7.0.20.0030.04320.09
7.0.10.0100.03320.18
7.0.00.0070.04020.18
5.6.280.0030.07720.91
5.6.260.0130.07720.51
5.6.250.0230.03320.72
5.6.240.0100.06020.59
5.6.230.0070.04020.70
5.6.220.0170.05020.81
5.6.210.0070.06720.63
5.6.200.0000.05720.92
5.6.190.0070.06720.94
5.6.180.0030.03721.08
5.6.170.0000.05021.26
5.6.160.0100.05721.29
5.6.150.0070.06321.27
5.6.140.0070.06321.09
5.6.130.0070.04321.27
5.6.120.0070.03721.14
5.6.110.0100.03721.27
5.6.100.0170.02721.13
5.6.90.0130.03320.92
5.6.80.0000.04320.68
5.6.70.0100.04320.51
5.6.60.0000.04020.40
5.6.50.0100.07020.34
5.6.40.0030.07320.48
5.6.30.0100.08320.51
5.6.20.0130.07320.59
5.6.10.0170.06320.49
5.6.00.0030.07720.33
5.5.380.0070.04020.55
5.5.370.0070.04020.53
5.5.360.0070.05020.37
5.5.350.0100.05320.48
5.5.340.0130.08320.86
5.5.330.0030.03720.95
5.5.320.0100.05020.86
5.5.310.0070.03720.90
5.5.300.0030.04321.02
5.5.290.0170.06020.97
5.5.280.0000.04721.02
5.5.270.0030.04320.74
5.5.260.0000.04720.73
5.5.250.0000.04320.81
5.5.240.0030.04020.38
5.5.230.0130.07020.29
5.5.220.0100.07720.35
5.5.210.0100.07320.16
5.5.200.0070.08720.21
5.5.190.0130.07320.26
5.5.180.0100.08320.38
5.5.160.0170.07320.30
5.5.150.0070.08020.39
5.5.140.0100.07320.38
5.5.130.0070.08020.39
5.5.120.0070.07320.17
5.5.110.0070.05720.23
5.5.100.0100.08020.11
5.5.90.0230.05720.16
5.5.80.0170.07019.98
5.5.70.0170.07720.20
5.5.60.0070.08320.07
5.5.50.0100.07020.02
5.5.40.0000.08719.98
5.5.30.0130.06020.27
5.5.20.0100.07720.22
5.5.10.0030.08720.15
5.5.00.0130.07720.04
5.4.450.0070.03719.36
5.4.440.0030.04019.39
5.4.430.0070.04719.33
5.4.420.0070.04719.38
5.4.410.0030.04019.21
5.4.400.0000.03719.32
5.4.390.0130.02719.18
5.4.380.0070.03719.23
5.4.370.0030.07719.24
5.4.360.0100.06719.14
5.4.350.0130.06319.07
5.4.340.0170.06719.14
5.4.320.0200.06719.23
5.4.310.0070.07019.34
5.4.300.0100.07018.97
5.4.290.0070.08019.23
5.4.280.0100.07019.23
5.4.270.0130.08019.01
5.4.260.0030.07719.15
5.4.250.0100.07319.22
5.4.240.0100.07019.06
5.4.230.0100.07319.09
5.4.220.0030.08719.13
5.4.210.0100.07719.18
5.4.200.0070.07719.17
5.4.190.0030.08019.14
5.4.180.0100.06319.05
5.4.170.0130.07019.34
5.4.160.0030.08019.02
5.4.150.0130.06719.07
5.4.140.0030.07316.64
5.4.130.0170.05316.57
5.4.120.0130.06316.55
5.4.110.0070.04716.43
5.4.100.0170.06716.71
5.4.90.0070.07316.63
5.4.80.0130.05016.61
5.4.70.0030.07716.60
5.4.60.0130.06316.55
5.4.50.0100.05016.55
5.4.40.0030.05316.49
5.4.30.0030.05016.63
5.4.20.0070.07316.55
5.4.10.0100.05316.53
5.4.00.0030.08016.00
5.3.290.0130.07314.65
5.3.280.0000.07714.69
5.3.270.0100.07014.64
5.3.260.0070.07714.64
5.3.250.0100.07314.74
5.3.240.0100.06014.74
5.3.230.0070.05014.73
5.3.220.0070.07014.80
5.3.210.0030.07714.43
5.3.200.0070.06714.43
5.3.190.0070.08014.80
5.3.180.0000.06714.54
5.3.170.0030.07014.54
5.3.160.0200.05314.70
5.3.150.0070.07014.57
5.3.140.0070.07714.59
5.3.130.0070.07014.68
5.3.120.0030.05314.55
5.3.110.0030.07314.56
5.3.100.0130.05714.04
5.3.90.0100.03714.18
5.3.80.0100.07314.00
5.3.70.0130.07014.16
5.3.60.0030.07014.14
5.3.50.0130.07013.97
5.3.40.0070.05013.95
5.3.30.0170.06013.88
5.3.20.0070.07313.93
5.3.10.0130.06313.68
5.3.00.0030.07013.67
5.2.170.0030.06012.24
5.2.160.0070.05012.24
5.2.150.0070.06012.24
5.2.140.0030.06012.24
5.2.130.0000.04012.24
5.2.120.0030.06012.24
5.2.110.0070.05712.24
5.2.100.0070.05712.24
5.2.90.0170.03012.24
5.2.80.0000.06712.24
5.2.70.0070.04012.24
5.2.60.0030.05712.24
5.2.50.0030.06712.24
5.2.40.0070.06312.24
5.2.30.0000.05312.24
5.2.20.0030.06312.24
5.2.10.0130.05012.24
5.2.00.0070.04012.24
5.1.60.0000.05012.24
5.1.50.0000.03012.24
5.1.40.0070.02312.24
5.1.30.0030.06012.24
5.1.20.0030.06012.24
5.1.10.0030.05712.24
5.1.00.0100.05012.24
5.0.50.0000.02712.24
5.0.40.0000.04712.24
5.0.30.0030.06312.24
5.0.20.0000.04012.24
5.0.10.0000.04012.24
5.0.00.0030.06012.24
4.4.90.0030.03012.24
4.4.80.0030.03312.24
4.4.70.0000.02012.24
4.4.60.0000.03012.24
4.4.50.0030.03012.24
4.4.40.0000.04712.24
4.4.30.0030.03312.24
4.4.20.0030.03012.24
4.4.10.0070.03012.24
4.4.00.0000.05712.24
4.3.110.0100.02712.24
4.3.100.0000.03312.24
4.3.90.0030.03012.24
4.3.80.0030.05312.24
4.3.70.0000.02712.24
4.3.60.0070.03012.24
4.3.50.0030.03312.24
4.3.40.0000.05712.24
4.3.30.0000.03012.24
4.3.20.0000.03712.24
4.3.10.0030.03312.24
4.3.00.0070.02712.24

preferences:
43.49 ms | 401 KiB | 5 Q