PHP多維陣列中刪除部分重複

Question

我有一個包含這個

Array ( 
[0] => Array ([0] => Sub1) 
[1] => Array ([0] => Sub1 [1] => Gold) 
[2] => Array ([0] => Sub1 [1] => Sub2) 
[3] => Array ([0] => Sub1 [1] => Sub2 [2] => Sub3) 
[4] => Array ([0] => Sub1 [1] => Sub2 [2] => Sub3 [3] => Sub4) 
[5] => Array ([0] => Sub1 [1] => Test) 
) 

如何刪除數組的數組[2] [3]，因爲它們是在[4]

和陣列存在會像

Array ( 
[0] => Array ([0] => Sub1 [1] => Gold) 
[1] => Array ([0] => Sub1 [1] => Sub2 [2] => Sub3 [3] => Sub4) 
[2] => Array ([0] => Sub1 [1] => Test) 
) 

是否有可能自動化？

Answer 1

$result = array(); 
foreach ($original as $orig_el) { 
    $found = false; 
    foreach ($result as &$new_el) { 
     if (count($orig_el) >= count($new_el) && array_slice($orig_el, 0, count($new_el)) == $new_el) { 
      $new_el = $orig_el; 
      $found = true; 
      break; 
     } 
    } 
    if (!$found) { 
     $result[] = $orig_el; 
    } 
}