PHP获取栏目的所有子级和孙级栏目的ID号示例

//@获取子栏目ID号 
private function sonCategoryIds($categoryID) 
{ 
//@初始化栏目数组 
$array[] = $categoryID; do 
{ 
$ids = ''; 
$temp = $this->mysql->select('SELECT `id` FROM `pcb_article_category` WHERE `parentID` IN (' . $categoryID . ')'); 
foreach ($temp as $v) 
{ 
$array[] = $v['id']; 
$ids .= ',' . $v['id']; 
} 
$ids = substr($ids, 1, strlen($ids)); 
$categoryID = $ids; 
} 
while (!empty($temp)); 
$ids = implode(',', $array); 
return $ids; 
}