php簡單實現無限分類樹形列表的方法_php技巧

本文執行個體講述了php簡單實現無限分類樹形列表的方法。分享給大家供大家參考。具體如下：

$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'),   20 => array('id' => 20, 'pid' => 0, 'name' => '廣東省'),   21 => array('id' => 21, 'pid' => 20, 'name' => '廣州市'),); $t = array(); foreach ($items as $id => $item) {   if ($item['pid']) {     $items[$item['pid']][$item['id']] = &$items[$item['id']];    $t[] = $id;   } } foreach($t as $u) {   unset($items[$u]); } echo "<pre>"; print_r($items);

希望本文所述對大家的php程式設計有所協助。