下面为大家介绍的是PHP无限极分类的代码，希望能够帮助到大家，大家一起来看一看吧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();

}

function genTree7($items) {

$tree = array(); //格式化好的树

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'),

);

print_r(genTree5($items));

print_r(genTree7($items));

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