不用遞迴實現無限分類資料的樹形格式化

標籤：http   style   遞迴   分類   else   code   大學   師範大學   sch   

<?php /** * 此方法由@Tonton 提供 * http://my.oschina.net/u/918697 * @date 2012-12-12  */function genTree5($items) {     foreach ($items as $item)         $items[$item[‘pid‘]][‘son‘][$item[‘id‘]] = &$items[$item[‘id‘]];     return isset($items[0][‘son‘]) ? $items[0][‘son‘] : array(); }  /** * 將資料格式化成樹形結構 * @author Xuefen.Tong * @param array $items * @return array  */function genTree9($items) {    $tree = array(); //格式化好的樹    foreach ($items as $item)        if (isset($items[$item[‘pid‘]]))            $items[$item[‘pid‘]][‘son‘][] = &$items[$item[‘id‘]];        else            $tree[] = &$items[$item[‘id‘]];    return $tree;} $items = array(    1 => array(‘id‘ => 1, ‘pid‘ => 0, ‘name‘ => ‘江西省‘),    2 => array(‘id‘ => 2, ‘pid‘ => 0, ‘name‘ => ‘黑龍江省‘),    3 => array(‘id‘ => 3, ‘pid‘ => 1, ‘name‘ => ‘南昌市‘),    4 => array(‘id‘ => 4, ‘pid‘ => 2, ‘name‘ => ‘哈爾濱市‘),    5 => array(‘id‘ => 5, ‘pid‘ => 2, ‘name‘ => ‘雞西市‘),    6 => array(‘id‘ => 6, ‘pid‘ => 4, ‘name‘ => ‘香坊區‘),    7 => array(‘id‘ => 7, ‘pid‘ => 4, ‘name‘ => ‘南崗區‘),    8 => array(‘id‘ => 8, ‘pid‘ => 6, ‘name‘ => ‘和興路‘),    9 => array(‘id‘ => 9, ‘pid‘ => 7, ‘name‘ => ‘西大直街‘),    10 => array(‘id‘ => 10, ‘pid‘ => 8, ‘name‘ => ‘東北林業大學‘),    11 => array(‘id‘ => 11, ‘pid‘ => 9, ‘name‘ => ‘哈爾濱工業大學‘),    12 => array(‘id‘ => 12, ‘pid‘ => 8, ‘name‘ => ‘哈爾濱師範大學‘),    13 => array(‘id‘ => 13, ‘pid‘ => 1, ‘name‘ => ‘贛州市‘),    14 => array(‘id‘ => 14, ‘pid‘ => 13, ‘name‘ => ‘贛縣‘),    15 => array(‘id‘ => 15, ‘pid‘ => 13, ‘name‘ => ‘于都縣‘),    16 => array(‘id‘ => 16, ‘pid‘ => 14, ‘name‘ => ‘茅店鎮‘),    17 => array(‘id‘ => 17, ‘pid‘ => 14, ‘name‘ => ‘大田鄉‘),    18 => array(‘id‘ => 18, ‘pid‘ => 16, ‘name‘ => ‘義源村‘),    19 => array(‘id‘ => 19, ‘pid‘ => 16, ‘name‘ => ‘上壩村‘),);echo "<pre>";print_r(genTree5($items));print_r(genTree9($items)); //後者輸出格式，前者類似，只是數組索引值不一樣，不過不影響資料結構/*Array([0] => Array    (        [id] => 1        [pid] => 0        [name] => 江西省        [son] => Array            (                [0] => Array                    (                        [id] => 3                        [pid] => 1                        [name] => 南昌市                    )                 [1] => Array                    (                        [id] => 13                        [pid] => 1                        [name] => 贛州市                        [son] => Array                            (                                [0] => Array                                    (                                        [id] => 14                                        [pid] => 13                                        [name] => 贛縣                                        [son] => Array                                            (                                            [0] => Array                                                (                                                    [id] => 16                                                    [pid] => 14                                                    [name] => 茅店鎮                                                    [son] => Array                                                        (                                                        [0] => Array                                                            (                                                            [id] => 18                                                            [pid] => 16                                                            [name] => 義源村                                                            )                                                         [1] => Array                                                            (                                                            [id] => 19                                                            [pid] => 16                                                            [name] => 上壩村                                                            )                                                         )                                                 )                                             [1] => Array                                                (                                                    [id] => 17                                                    [pid] => 14                                                    [name] => 大田鄉                                                )                                             )                                     )                                 [1] => Array                                    (                                        [id] => 15                                        [pid] => 13                                        [name] => 于都縣                                    )                             )                     )             )     ) [1] => Array    (        [id] => 2        [pid] => 0        [name] => 黑龍江省        [son] => Array            (                [0] => Array                    (                        [id] => 4                        [pid] => 2                        [name] => 哈爾濱市                        [son] => Array                            (                            [0] => Array                                (                                    [id] => 6                                    [pid] => 4                                    [name] => 香坊區                                    [son] => Array                                        (                                        [0] => Array                                            (                                                [id] => 8                                                [pid] => 6                                                [name] => 和興路                                                [son] => Array                                                    (                                                        [0] => Array                                                            (                                                            [id] => 10                                                            [pid] => 8                                                            [name] =>                                                              東北林業大學                                                            )                                                         [1] => Array                                                            (                                                            [id] => 12                                                            [pid] => 8                                                            [name] =>                                                             哈爾濱師範大學                                                            )                                                     )                                             )                                         )                                 )                             [1] => Array                                (                                    [id] => 7                                    [pid] => 4                                    [name] => 南崗區                                    [son] => Array                                        (                                        [0] => Array                                            (                                            [id] => 9                                            [pid] => 7                                            [name] => 西大直街                                            [son] => Array                                                (                                                [0] => Array                                                    (                                                    [id] => 11                                                    [pid] => 9                                                    [name] =>                                                      哈爾濱工業大學                                                    )                                                 )                                             )                                         )                                 )                             )                     )                 [1] => Array                    (                        [id] => 5                        [pid] => 2                        [name] => 雞西市                    )             )     ))*/

 

不用遞迴實現無限分類資料的樹形格式化