微信的永久素材有些删不了？

Question

删除name为api_mpnews_cover.jpg(不是我上传的)的文件时，报错提示："errcode":-1,"errmsg":"system error。但name为本人服务器上传的文件，则可成功删除。请问，那些不是我上传的文件，会不会越积越多？

Answer 1

先谢。那些不是别人上传的。估计是系统生成的。是调用“获取素材列表”接口查到的。
public function batchgetMaterial(){
$name = "material/batchget_material";//接口名称
$data = '{"type":"image","offset":0,"count":8}';
$res = $this->WechatAuth->callWcAuthApi($name,$data);//test01公共类
dump(stripslashes($res));
}把上传的素材、消息全删了，那些自动生成的还删不掉。查询结果：
string(656) "{"item":[{"media_id":"oozN-EVSi5A8FfphUyIaQMv9T4zdKqoKGy2zZhLL6NM","name":"api_mpnews_cover.jpg","update_time":1500634327,"url":""},{"media_id":"oozN-EVSi5A8FfphUyIaQO2-zTYzICiX8mmnKf6ladY","name":"api_mpnews_cover.jpg","update_time":1500624741,"url":""},{"media_id":"oozN-EVSi5A8FfphUyIaQPy_pC_z6Vt41FIJoN7s6Sw","name":"api_mpnews_cover.jpg","update_time":1500623573,"url":""},{"media_id":"oozN-EVSi5A8FfphUyIaQEXTk1ymnFr7gj6qG49TBTc","name":"api_mpnews_cover.jpg","update_time":1500593041,"url":""},{"media_id":"oozN-EVSi5A8FfphUyIaQN_I_66mOr_otVzjqSE9vEo","name":"api_mpnews_cover.jpg","update_time":1500593032,"url":""}],"total_count":0,"item_count":5}"