/*** 将返回的数据集转换成树* @param  array   $list  数据集* @param  string  $pk    主键* @param  string  $pid   父节点名称* @param  string  $child 子节点名称* @param  integer $root  根节点ID* @return array          转换后的树*/
function list_to_tree($list, $pk = 'id', $pid = 'pid', $child = '_child', $root=0) {$tree = array();// 创建Treeif(is_array($list)) {// 创建基于主键的数组引用$refer = array();foreach ($list as $key => $data) {$refer[$data[$pk]] =& $list[$key];}foreach ($list as $key => $data) {// 判断是否存在parent$parentId = $data[$pid];if ($root == $parentId) {$tree[$data[$pk]] =& $list[$key];}else{if (isset($refer[$parentId])) {$parent =& $refer[$parentId];$parent[$child][] =& $list[$key];}}}}return $tree;
}

array(3) {[11] => array(4) {["code"] => int(11)["name"] => string(9) "安徽省"["sup_code"] => string(1) "0"["son"] => array(2) {[0] => array(4) {["code"] => int(114)["name"] => string(9) "蚌埠市"["sup_code"] => string(2) "11"["son"] => array(1) {[0] => array(3) {["code"] => int(1141)["name"] => string(12) "龙子湖区"["sup_code"] => string(3) "114"}}}[1] => array(4) {["code"] => int(115)["name"] => string(9) "芜湖市"["sup_code"] => string(2) "11"["son"] => array(1) {[0] => array(3) {["code"] => int(1151)["name"] => string(9) "弋江区"["sup_code"] => string(3) "115"}}}}}[22] => array(4) {["code"] => int(22)["name"] => string(9) "浙江省"["sup_code"] => string(1) "0"["son"] => array(2) {[0] => array(4) {["code"] => int(221)["name"] => string(9) "杭州市"["sup_code"] => string(2) "22"["son"] => array(5) {[0] => array(3) {["code"] => int(2211)["name"] => string(9) "西湖区"["sup_code"] => string(3) "221"}[1] => array(3) {["code"] => int(2212)["name"] => string(9) "上城区"["sup_code"] => string(3) "221"}[2] => array(3) {["code"] => int(2213)["name"] => string(9) "下城区"["sup_code"] => string(3) "221"}[3] => array(3) {["code"] => int(2215)["name"] => string(9) "拱墅区"["sup_code"] => string(3) "221"}[4] => array(3) {["code"] => int(2216)["name"] => string(9) "萧山区"["sup_code"] => string(3) "221"}}}[1] => array(4) {["code"] => int(222)["name"] => string(9) "嘉兴市"["sup_code"] => string(2) "22"["son"] => array(1) {[0] => array(3) {["code"] => int(2221)["name"] => string(9) "南湖区"["sup_code"] => string(3) "222"}}}}}[33] => array(3) {["code"] => int(33)["name"] => string(9) "山东省"["sup_code"] => string(1) "0"}}

/*** 递归重组节点信息多维数组* @param  [array] $node [要处理的节点数组:二维数组]* @param  [int]   $root [根节点id]* @return [array]       [树状结构的节点体系:多维数组]*/
function node_merge($node,$root=0){$arr = array();foreach ($node as $v) {if ($v['pid'] == $root) {$v['child']=node_merge($node,$v['id']);$arr[]=$v;}}return $arr;
}

/*** 递归重组节点信息多维数组* @param  [array] $node    [要处理的节点数组:二维数组]* @param  [int]   $pid     [父级ID]* @param  [array] $pidArr  [父节点数组]* @return [array]          [树状结构的节点体系:多维数组]*/
function node_merge_gai($node,$pid=0,$pidArr){$arr = array();foreach ($node as $v) {if ($v['pid'] == $pid) {if(in_array($v['id'],$pidArr)){$v['child']=node_merge($node,$v['id'],$pidArr);}$arr[]=$v;}}return $arr;
}

/*** 二维数组转一维数组【实现低版本PHP支持】* @param  array $array 多维数组* @param  string $column_key  需要返回值的列* @param  string $index_key  用作返回数组的索引/键的列* @return array()*/
if (!function_exists("array_column")) {function array_column(array &$rows, $column_key, $index_key = null) {$data = array();if (empty($index_key)) {foreach ($rows as $row) {$data[] = $row[$column_key];}} else {foreach ($rows as $row) {$data[$row[$index_key]] = $row[$column_key];}}return $data;}
}

array(4) {[0] => array(5) {["id"] => int(1)["name"] => string(5) "Index"["title"] => string(6) "首页"["pid"] => string(1) "0"["child"] => array(2) {[0] => array(5) {["id"] => int(9)["name"] => string(8) "Category"["title"] => string(6) "分类"["pid"] => string(1) "1"["child"] => array(0) {}}[1] => array(5) {["id"] => int(10)["name"] => string(5) "Store"["title"] => string(6) "店铺"["pid"] => string(1) "1"["child"] => array(0) {}}}}[1] => array(5) {["id"] => int(2)["name"] => string(5) "Admin"["title"] => string(6) "后台"["pid"] => string(1) "0"["child"] => array(4) {[0] => array(5) {["id"] => int(5)["name"] => string(5) "Trade"["title"] => string(12) "交易管理"["pid"] => string(1) "2"["child"] => array(0) {}}[1] => array(5) {["id"] => int(6)["name"] => string(6) "Redbag"["title"] => string(12) "红包管理"["pid"] => string(1) "2"["child"] => array(0) {}}[2] => array(5) {["id"] => int(7)["name"] => string(5) "Order"["title"] => string(12) "订单管理"["pid"] => string(1) "2"["child"] => array(0) {}}[3] => array(5) {["id"] => int(8)["name"] => string(7) "Manager"["title"] => string(9) "管理员"["pid"] => string(1) "2"["child"] => array(0) {}}}}[2] => array(5) {["id"] => int(3)["name"] => string(4) "Home"["title"] => string(12) "图片中心"["pid"] => string(1) "0"["child"] => array(0) {}}[3] => array(5) {["id"] => int(4)["name"] => string(6) "Member"["title"] => string(12) "会员中心"["pid"] => string(1) "0"["child"] => array(3) {[0] => array(5) {["id"] => int(11)["name"] => string(4) "Fund"["title"] => string(6) "余额"["pid"] => string(1) "4"["child"] => array(0) {}}[1] => array(5) {["id"] => int(12)["name"] => string(7) "Product"["title"] => string(6) "产品"["pid"] => string(1) "4"["child"] => array(3) {[0] => array(5) {["id"] => int(14)["name"] => string(3) "Out"["title"] => string(9) "卖出的"["pid"] => string(2) "12"["child"] => array(0) {}}[1] => array(5) {["id"] => int(15)["name"] => string(4) "Sale"["title"] => string(9) "在售的"["pid"] => string(2) "12"["child"] => array(0) {}}[2] => array(5) {["id"] => int(16)["name"] => string(2) "In"["title"] => string(9) "仓库的"["pid"] => string(2) "12"["child"] => array(0) {}}}}[2] => array(5) {["id"] => int(13)["name"] => string(5) "Agent"["title"] => string(12) "代理关系"["pid"] => string(1) "4"["child"] => array(0) {}}}}
}