复制代码 代码如下:

$items = array(
 array(\'id\' => 1, \'pid\' => 0, \'name\' => \'一级11\' ),
 array(\'id\' => 11, \'pid\' => 0, \'name\' => \'www.phpstudy.net 一级12\' ),
 array(\'id\' => 2, \'pid\' => 1, \'name\' => \'二级21\' ),
 array(\'id\' => 10, \'pid\' => 11, \'name\' => \'二级22\' ),
 array(\'id\' => 3, \'pid\' => 1, \'name\' => \'二级23\' ),
 array(\'id\' => 12, \'pid\' => 11, \'name\' => \'二级24\' ),
 array(\'id\' => 13, \'pid\' => 12, \'name\' => \'三级31\' ),
 array(\'id\' => 9, \'pid\' => 1, \'name\' => \'二级25\' ),
);

复制代码 代码如下:

function formatTree($array, $pid = 0){
 $arr = array();
 $tem = array();
 foreach ($array as $v) {
  if ($v[\'pid\'] == $pid) {
   $tem = formatTree($array, $v[\'id\']);
                        //判断是否存在子数组
   $tem && $v[\'son\'] = $tem;
   $arr[] = $v;
  }
 }
 return $arr;
}