PHP：需要一維數組，但建設多維

Question

我寫了一個函數，以構建一個無限遞歸子類別的類別數組。我遇到的問題是它將子類別添加爲嵌套子數組，因此它是一個多維數組：

[0] [0]，[0] [1]，[0] [1] [0]，[0] [2]

但我想它看起來像它是一維：

[0]，[1]，[2]，[3]，[ 4]，[5]

My功能：

function cat_array($parent, $level){ 
    global $link; 
    $q_cats = "SELECT * FROM categories WHERE parent = '$parent' ORDER BY name ASC"; 
    $r_cats = mysqli_query ($link, $q_cats) or die('Catastrophic failure [Super secret code 95162]'); 
    $num_cats=mysqli_num_rows($r_cats); 
    if($num_cats != 0){ 
     while ($row_cats = mysqli_fetch_assoc ($r_cats)) { 
      $cat_id = $row_cats['id']; 
      $name = $row_cats['name']; 
      $safename = $row_cats['safename']; 
      $parent = $row_cats['parent']; 
      $catcounter = mysqli_query($link, "SELECT COUNT(*) AS id FROM links WHERE category = '$cat_id'"); 
      $catnum = mysqli_fetch_array($catcounter); 
      $catcount = number_format($catnum["id"]); 

      $cat_array = array("id"=>$cat_id, "name"=>$name, "safename"=>$safename, "parent"=>$parent, "linkcount"=>$catcount, "level"=>$level); 

      /* This is supposed to use the function again inside this loop to find the children of the current row */ 
      $cat_array3[] = cat_array($cat_id, $level+1); 

      /* If the child loop isn't empty, merge them. */ 
      if(!empty($cat_array3)){ 
       $cat_array4[] = array_merge($cat_array, $cat_array3); 
      } 

      /* Wiping the temp arrays */ 
      UNSET($cat_array); 
      UNSET($cat_array2); 
      UNSET($cat_array3); 


     } 
     /* Placed inside the count check so it doesn't return anything if nothing found */ 
     $cat_array = $cat_array4; 
     return $cat_array; 
    } 

} 

下面是它的建築物的數組：

Array 
(
    [0] => Array 
     (
      [id] => 1 
      [name] => ALTERNATOR, BATTERY & CHARGING 
      [safename] => alternator-battery-and-charging 
      [parent] => 0 
      [linkcount] => 0 
      [level] => 0 
      [0] => Array 
       (
        [0] => Array 
         (
          [id] => 3 
          [name] => ALTERNATOR 
          [safename] => alternator 
          [parent] => 1 
          [linkcount] => 0 
          [level] => 1 
          [0] => Array 
           (
            [0] => Array 
             (
              [id] => 35 
              [name] => Loose or Weak Contact at Generator Harness Connector TSB 96-21-4 for 86-93 Bronco 
              [safename] => loose-or-weak-contact-at-generator-harness-connector-tsb-96-21-4-for-86-93-bronco 
              [parent] => 3 
              [linkcount] => 0 
              [level] => 2 
              [0] => 
             ) 

            [1] => Array 
             (
              [id] => 36 
              [name] => No Crank, Low State Of Battery Charge TSB 91-10-8 for 85-91 Bronco, Bronco II, Econoline, F-150-350 Series, Ranger; 86-91 Aerostar; 88-91 F Super Duty, F47, F-53, F-59; 91 Explorer, etc. 
              [safename] => no-crank-low-state-of-battery-charge-tsb-91-10-8-for-85-91-bronco-bronco-ii-econoline-f-150-350-series-ranger-86-91-aerostar-88-91-f-super-duty-f47-f-53-f-59-91-explorer-etc- 
              [parent] => 3 
              [linkcount] => 0 
              [level] => 2 
              [0] => 
             ) 

           ) 

         ) 

        [1] => Array 
         (
          [id] => 4 
          [name] => BATTERY & ISOLATOR 
          [safename] => battery-and-isolator 
          [parent] => 1 
          [linkcount] => 0 
          [level] => 1 
          [0] => 
         ) 

        [2] => Array 
         (
          [id] => 5 
          [name] => GENERAL INFORMATION 
          [safename] => general-information 
          [parent] => 1 
          [linkcount] => 0 
          [level] => 1 
          [0] => 
         ) 

       ) 

     ) 

    [1] => Array 
     (
      [id] => 2 
      [name] => AUDIO AND VIDEO 
      [safename] => audio-and-video 
      [parent] => 0 
      [linkcount] => 0 
      [level] => 0 
      [0] => 
     ) 

    [2] => Array 
     (
      [id] => 6 
      [name] => BODY 
      [safename] => body 
      [parent] => 0 
      [linkcount] => 0 
      [level] => 0 
      [0] => 
     ) 
    ) 
) 

有人可以幫我弄清楚如何修改我的函數來構建單維數組嗎？

謝謝你的時間！

Answer 1

解決：

function cat_array($parent, $level){ 
    $go = 1; 
    global $link; 
    if(!ISSET($cat_array)){ 
     $cat_array = array(); 
    } 
    $q_cats = "SELECT * FROM categories WHERE parent = '$parent' ORDER BY name ASC"; 
    $r_cats = mysqli_query ($link, $q_cats) or die('Catastrophic failure [Super secret code 95162]'); 
    $num_cats=mysqli_num_rows($r_cats); 
    if($num_cats != 0){ 
     while ($row_cats = mysqli_fetch_assoc ($r_cats)) { 
      $cat_id = $row_cats['id']; 
      $name = $row_cats['name']; 
      $safename = $row_cats['safename']; 
      $parent = $row_cats['parent']; 
      $catcounter = mysqli_query($link, "SELECT COUNT(*) AS id FROM links WHERE category = '$cat_id'"); 
      $catnum = mysqli_fetch_array($catcounter); 
      $catcount = number_format($catnum["id"]); 

      $cat_array1[] = array("id"=>$cat_id, "name"=>$name, "safename"=>$safename, "parent"=>$parent, "linkcount"=>$catcount, "level"=>$level); 

      $cat_array = array_merge($cat_array, $cat_array1); 

      /* This is supposed to use the function again inside this loop to find the children of the current row */ 
      $cat_array3 = cat_array($cat_id, $level+1); 

      if(ISSET($cat_array3) AND !empty($cat_array3)){ 
       $cat_array = array_merge($cat_array, $cat_array3); 
      } 

     } 

    } 
    return $cat_array; 
}