php如何判断SQL语句的查询结果是否为空？
代码如下：
<br />
$sql =mysql_query( "select * from tv_video where title like '%$keyword%' limit $offset,$PageSize");<br />
$result=mysql_fetch_array($sql);<br />
if(!empty($result)){<br />
while($result=mysql_fetch_array($sql)){echo "hello word!"}<br />
if(!empty($result)){<br />
echo "记录为空";<br />
}<br />
Copy after login
测试结果为：无论记录是否为空，都会输出"hello word!"与"记录为空",也就是两个条件都成立，这就让我很费解了，到底怎样判断一个SQL返回结果是否为空？
------解决方案--------------------$result =mysql_query( "select * from tv_video where title like '%$keyword%' limit $offset,$PageSize");<br />
if (mysql_num_rows($result) < 1) echo '记录集为空';
Copy after login
$result =mysql_query( "select * from tv_video where title like '%$keyword%' limit $offset,$PageSize");<br />
if(count($result)<0)<br />
{<br />
echo "查询无数据！";<br />
}Copy after login
这样试试
------解决方案--------------------$result =mysql_query( "select * from tv_video where title like '%$keyword%' limit $offset,$PageSize");
if(!mysql_affected_rows()){
echo '没有记录';
}
------解决方案--------------------说明
int mysql_affected_rows ([ resource $link_identifier ] )
取得最近一次与 link_identifier 关联的 INSERT，UPDATE 或 DELETE 查询所影响的记录行数。
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