Warning: mysql_fetch_array():

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in 

$connect=mysql_connect("localhost","root","123") or die("无法连接数据库".mysql_error()); 
 
mysql_select_db("cmstest") or die("无法选择数据库".mysql_errno()); 
 
$sql="select * from article where pid=1"; 
$result=mysql_query($sql,$connect) or die("无法查询sql语句".mysql_error()); 
$nums=mysql_num_rows($result); 
echo "nums is:".$nums; 
while($res=mysql_fetch_array($result)){     
echo $res[0];   
}

原来是$result重复了.

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