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<?php $arr = [ ['1', 'a'], ['2', 'b'], ['3', 'c'], ['3', 'd'], ['2', 'e'], ['3', 'f'], ['2', 'g'], ['3', 'h'], ['1', 'i'], ['2', 'j'], ['3', 'k'], ]; $savedLevelOne = null; $savedLevels = []; $prevLevel = null; foreach ($arr as $arrItem) { [$level, $value] = $arrItem; if ($level !== '3' && $prevLevel === '3') { var_dump([$savedLevelOne, ...$savedLevels]); $savedLevels = []; } if ($level === '1') { $savedLevelOne = $value; } else { $savedLevels[] = $value; } $prevLevel = $level; } var_dump([$savedLevelOne, ...$savedLevels]);
Output for git.master, git.master_jit
array(4) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" [3]=> string(1) "d" } array(3) { [0]=> string(1) "a" [1]=> string(1) "e" [2]=> string(1) "f" } array(3) { [0]=> string(1) "a" [1]=> string(1) "g" [2]=> string(1) "h" } array(3) { [0]=> string(1) "i" [1]=> string(1) "j" [2]=> string(1) "k" }

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