以下是该类的代码:
class Delete_Category extends Category {
private $idchain = array();
public function __construct($id) {
parent::__construct();
$this->check_id($id);
$this->get_delete_ids($this->id);
$this->delete_category($this->idchain);
}
//从数据库中获取所有子ID并将它们存储在数组中
private function get_delete_ids($id) {
$this->query = $this->db->prepare("SELECT id FROM `shop_categories` WHERE parent_id = :id");
$this->query->execute(array("id" => $id));
while($result = $this->query->fetch(PDO::FETCH_ASSOC)) {
$this->get_delete_ids($result['id']);
}
$this->idchain[]= $id;
}
//将数组内爆为id字符串并将其抛入查询
private function delete_category($id_array) {
$id = implode(",",$id_array);
try {
$this->query = $this->db->prepare("DELETE FROM `shop_categories` WHERE id IN (:id)");
$this->query->execute(array(':id' => $id));
}
catch(PDOException $e) {
// log it{
}
}
}
事情是,这总是最终只删除最后一个ID。该查询似乎正在起作用,因为它看起来完全正常,如果我回应它并用$ id替换:id。
//回显的SQL输出字符串:
DELETE FROM `shop_categories` WHERE id IN (11,6)
//如果我手动将其添加到数据库,它按预期工作,所以问题必须在PDO声明的某个地方......任何人都可以帮助我吗?