3v4l.org

run code in 300+ PHP versions simultaneously
<?php function find_pairs($array) { // re-index to 0 $array = array_values($array['parent_id']); // sort so the longest arrays are first usort($array, function ($a, $b) { return count($b) - count($a); }); // output array $pairs = array(); for ($i = 0, $j = 1; $i < count($array) - 1; $i++) { if (!count($array[$i])) continue; while ($j <= $i || $j < count($array) && !count($array[$j])) $j++; while (count($array[$i]) && isset($array[$j]) && count($array[$j])) { $pairs[] = array(array_shift($array[$i]), array_shift($array[$j])); // exhausted other arrays elements? while ($j < count($array) && !count($array[$j])) $j++; } } return $pairs; } $array = array ( 'parent_id' => array ( 0 => array ( 0 => 12 ), 1 => array ( 0 => 22 ), 2 => array ( 0 => 23, 1 => 24 ) ) ); print_r(find_pairs($array)); $array = array ( 'parent_id' => array ( 9 => array ( 0 => 12 ), 20 => array ( 0 => 25, 1 => 22 ), 21 => array ( 0 => 23, 1 => 24 ) ) ); print_r(find_pairs($array)); $array = array ( 'parent_id' => array ( 9 => array ( 0 => 11, 1 => 12 ), 10 => array ( 0 => 13, 1 => 14 ), 20 => array ( 0 => 21, 1 => 22 ), 21 => array ( 0 => 23 ) ) ); print_r(find_pairs($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)
8.4.130.0120.00917.57
8.4.120.0070.00420.39
8.4.110.0100.01222.44
8.4.100.0110.00917.90
8.4.90.0110.00917.77
8.4.80.0110.00519.57
8.4.70.0060.00217.78
8.4.60.0060.00220.12
8.4.50.0120.00720.39
8.4.40.0030.01619.56
8.4.30.0000.00817.61
8.4.20.0070.00320.86
8.4.10.0060.00317.64
8.3.260.0110.00816.97
8.3.250.0110.00718.81
8.3.240.0130.00616.54
8.3.230.0150.00416.48
8.3.220.0130.00418.36
8.3.210.0120.00716.86
8.3.200.0040.00516.44
8.3.190.0090.00617.29
8.3.180.0030.00518.85
8.3.170.0060.00920.74
8.3.160.0070.00717.05
8.3.150.0080.00816.97
8.3.140.0030.00516.63
8.3.130.0100.01018.45
8.3.120.0060.00320.69
8.3.110.0100.00720.94
8.3.100.0000.00924.06
8.3.90.0060.00326.77
8.3.80.0000.01118.68
8.3.70.0060.00916.63
8.3.60.0130.00718.55
8.3.50.0130.00720.20
8.3.40.0100.01018.83
8.3.30.0120.00318.84
8.3.20.0050.00221.03
8.3.10.0040.00421.95
8.3.00.0000.00821.64
8.2.290.0110.00920.76
8.2.280.0150.00516.61
8.2.270.0150.00419.23
8.2.260.0050.00318.48
8.2.250.0090.00016.74
8.2.240.0070.01117.20
8.2.230.0080.00822.58
8.2.220.0070.01137.54
8.2.210.0080.00826.77
8.2.200.0040.00718.29
8.2.190.0110.01116.75
8.2.180.0000.01416.38
8.2.170.0100.01018.96
8.2.160.0140.00022.96
8.2.150.0040.00424.18
8.2.140.0100.00724.66
8.2.130.0060.00326.16
8.2.120.0030.00520.68
8.2.110.0080.00321.08
8.2.100.0040.00717.84
8.2.90.0030.00519.35
8.2.80.0030.00517.97
8.2.70.0030.00517.75
8.2.60.0080.00017.50
8.2.50.0090.00018.10
8.2.40.0060.00319.45
8.2.30.0000.00720.59
8.2.20.0040.00418.16
8.2.10.0040.00419.45
8.2.00.0070.00018.16
8.1.330.0100.00923.91
8.1.320.0100.00516.16
8.1.310.0040.00416.74
8.1.300.0080.01218.08
8.1.290.0030.00718.88
8.1.280.0030.01725.92
8.1.270.0040.00422.24
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0100.01022.59
8.1.230.0090.00318.84
8.1.220.0060.00317.79
8.1.210.0000.00918.77
8.1.200.0100.00317.35
8.1.190.0040.00417.55
8.1.180.0050.00318.10
8.1.170.0040.00418.50
8.1.160.0040.00418.98
8.1.150.0000.00818.83
8.1.140.0040.00419.16
8.1.130.0000.00720.21
8.1.120.0040.00417.52
8.1.110.0050.00217.49
8.1.100.0000.00717.47
8.1.90.0070.00017.50
8.1.80.0030.00717.39
8.1.70.0000.00717.38
8.1.60.0040.00417.66
8.1.50.0000.00717.59
8.1.40.0090.00017.52
8.1.30.0000.00817.57
8.1.20.0090.00317.68
8.1.10.0040.00417.57
8.1.00.0100.00017.57
8.0.300.0000.00818.77
8.0.290.0000.00916.75
8.0.280.0080.00018.40
8.0.270.0050.00217.29
8.0.260.0000.00818.52
8.0.250.0030.00617.05
8.0.240.0030.00317.10
8.0.230.0070.00017.07
8.0.220.0030.00316.98
8.0.210.0030.00317.00
8.0.200.0000.00716.97
8.0.190.0030.00616.98
8.0.180.0040.00416.84
8.0.170.0060.00316.93
8.0.160.0070.00016.88
8.0.150.0000.00816.94
8.0.140.0040.00416.93
8.0.130.0050.00213.43
8.0.120.0050.00216.95
8.0.110.0040.00416.90
8.0.100.0040.00416.75
8.0.90.0040.00416.79
8.0.80.0070.01216.88
8.0.70.0030.00516.73
8.0.60.0080.00016.71
8.0.50.0070.00016.99
8.0.30.0090.00916.86
8.0.20.0090.01217.04
8.0.10.0000.00716.84
8.0.00.0090.00916.75
7.4.330.0000.00516.63
7.4.320.0060.00016.64
7.4.300.0000.00816.54
7.4.290.0000.00816.46
7.4.280.0040.00416.59
7.4.270.0080.00016.46
7.4.260.0000.00716.48
7.4.250.0000.00716.55
7.4.240.0040.00416.53
7.4.230.0050.00216.39
7.4.220.0050.00316.46
7.4.210.0120.00816.55
7.4.200.0040.00416.55
7.4.160.0070.00916.52
7.4.140.0090.00917.86
7.4.130.0070.01116.69
7.4.120.0070.01316.53
7.4.110.0140.00416.54
7.4.100.0040.01416.53
7.4.90.0120.00416.50
7.4.80.0060.00919.39
7.4.70.0090.00916.58
7.4.60.0120.00316.67
7.4.50.0060.01016.53
7.4.40.0150.00916.76
7.4.00.0050.01015.07
7.3.330.0050.00013.25
7.3.320.0000.00713.25
7.3.310.0030.00516.21
7.3.300.0030.00316.35
7.3.290.0140.00616.36
7.3.280.0090.01016.37
7.3.260.0090.00916.49
7.3.240.0090.00916.49
7.3.230.0070.01016.48
7.3.210.0130.00716.53
7.3.200.0120.00416.55
7.3.190.0060.01016.48
7.3.180.0060.01316.33
7.3.170.0060.00916.71
7.3.160.0040.01116.43
7.3.120.0090.00915.00
7.3.110.0140.00415.06
7.3.100.0140.00414.59
7.3.90.0080.00814.83
7.3.80.0060.00314.66
7.3.70.0060.00614.98
7.3.60.0000.01614.80
7.3.50.0060.00914.54
7.3.40.0070.00814.84
7.3.30.0090.00714.69
7.3.20.0080.00516.70
7.3.10.0100.00516.56
7.3.00.0100.00816.65
7.2.330.0110.00816.39
7.2.320.0060.01216.75
7.2.310.0110.00716.82
7.2.300.0030.01416.56
7.2.290.0080.01316.83
7.2.250.0070.01115.23
7.2.240.0070.01315.11
7.2.230.0030.01214.90
7.2.220.0130.00314.88
7.2.210.0030.01215.32
7.2.200.0030.00915.05
7.2.190.0090.00615.00
7.2.180.0090.00615.14
7.2.170.0100.01014.99
7.2.160.0040.00715.08
7.2.150.0030.00816.81
7.2.140.0120.00016.79
7.2.130.0060.01516.95
7.2.120.0040.01016.70
7.2.110.0120.00316.91
7.2.100.0160.00016.66
7.2.90.0120.01216.94
7.2.80.0110.00316.91
7.2.70.0000.01116.79
7.2.60.0000.01116.97
7.2.50.0080.00316.83
7.2.40.0100.01316.86
7.2.30.0060.00616.97
7.2.20.0030.00816.93
7.2.10.0110.00416.90
7.2.00.0090.00316.81
7.1.330.0030.01315.93
7.1.320.0090.00415.93
7.1.310.0030.00615.81
7.1.300.0080.00815.71
7.1.290.0040.01115.79
7.1.280.0110.00615.78
7.1.270.0050.01015.76
7.1.260.0080.01115.67
7.1.250.0100.01315.72

preferences:
127.64 ms | 403 KiB | 5 Q