Home > Article > Backend Development > 为何总是Warning: mysql_fetch_object(): supplied argument is not a valid MySQL resul

为何总是Warning: mysql_fetch_object(): supplied argument is not a valid MySQL resul

WBOYOriginal: 2016-06-13 12:52:03718browse

为什么总是Warning: mysql_fetch_object(): supplied argument is not a valid MySQL resul
为什么总是

Warning: mysql_fetch_object(): supplied argument is not a valid MySQL result resource in D:\AppServ1\www\forum\index.php on line 46

代码：
               $id = $row["id"];
   $res=mysql_query("select count(*) as total from reply where topic id='$id'");
   $r = mysql_fetch_object($res);
大家帮帮忙

------解决方案--------------------
topic id='$id'" //这里错了吧
------解决方案--------------------
你把SQL语句放到MYSQL里面运行，看有没有结果
------解决方案--------------------
最后的$id用连字符拼接吧，别直接写到sql里
------解决方案--------------------
topic是另外一张表那得采用连接查询或者是多表符合查询

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article： php exec()某个shell结果失误，原因是php中的 grep只能处理文本流，二进制流不行 Next article：文件读写顺序有关问题

See more

为何总是Warning: mysql_fetch_object(): supplied argument is not a valid MySQL resul

Related articles