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<?php $arr = [["4|1","4|3","4|6"],[["4|1|2","4|1|8"],["4|3|4","4|3|9"],["4|6|5","4|6|12"]]]; array_walk_recursive($arr, function($v) use(&$result){ $result[] = $v; }); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 4|1 [1] => 4|3 [2] => 4|6 [3] => 4|1|2 [4] => 4|1|8 [5] => 4|3|4 [6] => 4|3|9 [7] => 4|6|5 [8] => 4|6|12 )

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