php简单实现无限分类树形列表的方法

本文实例讲述了php简单实现无限分类树形列表的方法。分享给大家供大家参考。具体如下：

$items = array(   1 => array('id' => 1, 'pid' => 0, 'name' => '江西省'),   2 => array('id' => 2, 'pid' => 0, 'name' => '黑龙江省'),  3 => array('id' => 3, 'pid' => 1, 'name' => '南昌市'),   4 => array('id' => 4, 'pid' => 2, 'name' => '哈尔滨市'),  5 => array('id' => 5, 'pid' => 2, 'name' => '鸡西市'),   6 => array('id' => 6, 'pid' => 4, 'name' => '香坊区'),   7 => array('id' => 7, 'pid' => 4, 'name' => '南岗区'),   8 => array('id' => 8, 'pid' => 6, 'name' => '和兴路'),   9 => array('id' => 9, 'pid' => 7, 'name' => '西大直街'),   10 => array('id' => 10, 'pid' => 8, 'name' => '东北林业大学'),  11 => array('id' => 11, 'pid' => 9, 'name' => '哈尔滨工业大学'),  12 => array('id' => 12, 'pid' => 8, 'name' => '哈尔滨师范大学'),  13 => array('id' => 13, 'pid' => 1, 'name' => '赣州市'),   14 => array('id' => 14, 'pid' => 13, 'name' => '赣县'),   15 => array('id' => 15, 'pid' => 13, 'name' => '于都县'),   16 => array('id' => 16, 'pid' => 14, 'name' => '茅店镇'),   17 => array('id' => 17, 'pid' => 14, 'name' => '大田乡'),   18 => array('id' => 18, 'pid' => 16, 'name' => '义源村'),   19 => array('id' => 19, 'pid' => 16, 'name' => '上坝村'),   20 => array('id' => 20, 'pid' => 0, 'name' => '广东省'),   21 => array('id' => 21, 'pid' => 20, 'name' => '广州市'),); $t = array(); foreach ($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);

希望本文所述对大家的php程序设计有所帮助。