3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ [ 'name' => 'Event A', 'date' => '2023-02-31' ], [ 'name' => 'Event A', 'date' => '2023-03-01' ], [ 'name' => 'Event B', 'date' => '2023-03-02' ], [ 'name' => 'Event C', 'date' => '2023-03-03' ], [ 'name' => 'Event D', 'date' => '2023-04-07' ], [ 'name' => 'Event E', 'date' => '2023-04-08' ], [ 'name' => 'Event E', 'date' => '2023-04-09' ], [ 'name' => 'Event E', 'date' => '2023-04-19' ], [ 'name' => 'Event E', 'date' => '2023-04-20' ], [ 'name' => 'Event E', 'date' => '2023-04-24' ], ]; $result = []; $last = []; foreach ($array as ['date' => $date]) { sscanf($date, '%d-%d-%d', $y, $m, $d); $key = $y . $m; // group by year-month if (isset($last[$key])) { $lastPadded = sprintf('%02s', $last[$key]); $thisPadded = sprintf('%02s', $d); if (($d - 1) === $last[$key]) { $result[$key] = preg_replace("~-$lastPadded\b|\b$lastPadded\b\K~", "-$thisPadded", $result[$key]); // hyphenate } else { $result[$key] = preg_replace("~\b$lastPadded\b\K~", ", $thisPadded", $result[$key], 1); // comma-separate } } else { $result[$key] = sprintf('%02s / %02s / %d', $d, $m, $y); // push initial string for year-month } $last[$key] = $d; } echo implode(", ", $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)
8.4.140.0130.00917.63
8.4.130.0110.00917.88
8.4.120.0140.00622.23
8.4.110.0100.01020.70
8.4.100.0080.01017.93
8.4.90.0120.00918.59
8.4.80.0050.00317.98
8.4.70.0100.00818.30
8.4.60.0040.00420.52
8.4.50.0100.00819.78
8.4.40.0030.00619.88
8.4.30.0060.00319.02
8.4.20.0120.00625.67
8.4.10.0060.00323.94
8.3.270.0100.01017.01
8.3.260.0120.00816.77
8.3.250.0050.00318.95
8.3.240.0100.00916.97
8.3.230.0130.00717.04
8.3.220.0130.00617.35
8.3.210.0060.00316.87
8.3.200.0050.00416.70
8.3.190.0060.00217.32
8.3.180.0140.00518.41
8.3.170.0090.00619.17
8.3.160.0040.01416.92
8.3.150.0070.01117.31
8.3.140.0090.00916.78
8.3.130.0000.01018.75
8.3.120.0030.00619.05
8.3.110.0040.00820.94
8.3.100.0130.00616.61
8.3.90.0040.00418.57
8.3.80.0030.00618.55
8.3.70.0070.01318.40
8.3.60.0090.01218.52
8.3.50.0120.00918.71
8.3.40.0080.00620.09
8.3.30.0090.00619.09
8.3.20.0050.00324.18
8.3.10.0050.00324.66
8.3.00.0040.00426.16
8.2.290.0110.00820.32
8.2.280.0060.01318.50
8.2.270.0160.00317.20
8.2.260.0070.01119.09
8.2.250.0000.00918.48
8.2.240.0000.01019.03
8.2.230.0030.00622.58
8.2.220.0080.00024.06
8.2.210.0040.01526.77
8.2.200.0070.00418.79
8.2.190.0150.00617.00
8.2.180.0110.00716.88
8.2.170.0040.01119.42
8.2.160.0100.00722.96
8.2.150.0040.00425.66
8.2.140.0080.00024.66
8.2.130.0040.00426.16
8.2.120.0000.00821.04
8.2.110.0090.00020.39
8.2.100.0040.00818.16
8.2.90.0030.00618.00
8.2.80.0040.00418.92
8.2.70.0080.00017.75
8.2.60.0050.00317.88
8.2.50.0040.00417.75
8.2.40.0080.00817.88
8.2.30.0130.00317.88
8.2.20.0110.00517.88
8.2.10.0110.00617.62
8.2.00.0150.00017.88
8.1.330.0130.00622.01
8.1.320.0140.00516.16
8.1.310.0130.00616.89
8.1.300.0090.00618.74
8.1.290.0060.00318.88
8.1.280.0150.00325.92
8.1.270.0040.00424.66
8.1.260.0040.00426.35
8.1.250.0000.00828.09
8.1.240.0120.00623.73
8.1.230.0110.00021.11
8.1.220.0040.00418.89
8.1.210.0080.00018.77
8.1.200.0040.00417.60
8.1.190.0040.00417.61
8.1.180.0030.00619.31
8.1.170.0080.00817.62
8.1.160.0180.00017.62
8.1.150.0100.00717.62
8.1.140.0120.00717.62
8.1.130.0140.00317.62
8.1.120.0110.00717.62
8.1.110.0000.01917.62
8.1.100.0140.00517.62
8.1.90.0140.00317.62
8.1.80.0130.00517.62
8.1.70.0130.00417.62
8.1.60.0100.01017.62
8.1.50.0110.00817.62
8.1.40.0120.00617.62
8.1.30.0120.00517.71
8.1.20.0000.01717.62
8.1.10.0110.00817.62
8.1.00.0080.00817.62
8.0.300.0030.00618.77
8.0.290.0040.00417.25
8.0.280.0100.00717.62
8.0.270.0160.00017.62
8.0.260.0120.00417.62
8.0.250.0130.00317.62
8.0.240.0090.00917.62
8.0.230.0170.00017.62
8.0.220.0140.00217.62
8.0.210.0100.00617.62
8.0.200.0170.00017.62
8.0.190.0180.00317.62
8.0.180.0070.01117.62
8.0.170.0110.00617.62
8.0.160.0170.00017.62
8.0.150.0120.00417.62
8.0.140.0170.00017.62
8.0.130.0140.00417.62
8.0.120.0130.00317.62
8.0.110.0130.00417.62
8.0.100.0120.00417.62
8.0.90.0110.00517.62
8.0.80.0080.00817.62
8.0.70.0080.00817.62
8.0.60.0170.00017.62
8.0.50.0060.00917.62
8.0.30.0110.00517.62
8.0.20.0120.00317.62
8.0.10.0120.00417.62

preferences:
87.1 ms | 403 KiB | 5 Q