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  1. <?php
  2.  
  3. $array = [1,1,1,2,2,3,3,1,1,2,2,3];
  4.  
  5. $result = [];
  6. $carry = [array_shift($array) => 1];
  7.  
  8. foreach ($array as $value) {
  9.     if (isset($carry[$value])) {
  10.         ++$carry[$value];
  11.     } else {
  12.         $result[] = $carry;
  13.         $carry = [$value => 1];
  14.     }
  15. }
  16. $result[] = $carry;
  17. print_r($result);
Success #stdin #stdout 0.01s 24144KB
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Array
(
    [0] => Array
        (
            [1] => 3
        )

    [1] => Array
        (
            [2] => 2
        )

    [2] => Array
        (
            [3] => 2
        )

    [3] => Array
        (
            [1] => 2
        )

    [4] => Array
        (
            [2] => 2
        )

    [5] => Array
        (
            [3] => 1
        )

)
https://ideone.com/upQLa4
language:
PHP (php 7.3.5)
created:
4 years ago
visibility:
secret

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