日期:2014-05-16 浏览次数:20455 次
首先看代码实现
function generateTree($items){ $tree = array(); foreach($items as $item){ if(isset($items[$item['pid']])){ $items[$item['pid']]['son'][] = &$items[$item['id']]; }else{ $tree[] = &$items[$item['id']]; } } return $tree; } $items = array( 1 => array('id' => 1, 'pid' => 0, 'name' => '安徽省'), 2 => array('id' => 2, 'pid' => 0, 'name' => '浙江省'), 3 => array('id' => 3, 'pid' => 1, 'name' => '合肥市'), 4 => array('id' => 4, 'pid' => 3, 'name' => '长丰县'), 5 => array('id' => 5, 'pid' => 1, 'name' => '安庆市'), ); print_r(generateTree($items));
Array ( [0] => Array ( [id] => 1 [pid] => 0 [name] => 安徽省 [son] => Array ( [0] => Array ( [id] => 3 [pid] => 1 [name] => 合肥市 [son] => Array ( [0] => Array ( [id] => 4 [pid] => 3 [name] => 长丰县 ) ) ) [1] => Array ( [id] => 5 [pid] => 1 [name] => 安庆市 ) ) ) [1] => Array ( [id] => 2 [pid] => 0 [name] => 浙江省 ) )
------------------------------------ 下面方框里是上一个博主提出的问题,我没看懂什么意思 ,惭愧!-------------------------------------
上面生成树方法还可以精简到5行:function generateTree($items){ foreach($items as $item) $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; return isset($items[0]['son']) ? $items[0]['son'] : array(); }上面这种无限极分类数据树形结构化的方法值得借鉴。但是我觉得这段代码实际用途并不明显啊,你想取出格式化的树形数据还是要递归啊: /** * 如何取数据格式化的树形数据 */ $tree = generateTree($items); function getTreeData($tree){ foreach($tree as $t){ echo $t['name'].'<br>'; if(isset($t['son'])){ getTreeData($t['son']); } } } getTreeData($tree); |