需求：需要对数组按照序号逐级显示，下级带缩进。
private function _getCategoryName($data,$kg=''){
static $num = 1;
static $retrun = array();
if(!empty($data)){
foreach ($data as $key => $value){
$retrun[] = $num++.'.'.$kg.$value['name'];
if(!empty($value['children'])){
$this->_getCategoryName($value['children'],$kg.'——');
}
}
}
return $retrun;
}
根据序号查找ID：
/**
* 获取产品分类ID
* @access private
* @param array $data
* @return array
*/
private function _getCategoryId($data, $k){
static $num = 1;
static $category_id = 0;
if($num==1){
$category_id = 0;
}
if(!empty($data)){
foreach ($data as $key => $value){
if(empty($category_id)){
if($num++ == $k){
$category_id = $value['category_id'];
$num = 1;
break;
}elseif(!empty($value['children'])){
$this->_getCategoryId($value['children'], $k);
}
}
}
}
return $category_id;
}