Warning:mysql_fetch_array (): _php tutorial

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

$connect =mysql_connect ("localhost", "root", "123") or Die ("Unable to connect to database". Mysql_error ());

mysql_select_db ("Cmstest") or Die ("Cannot select Database". Mysql_errno ());

$sql = "SELECT * from article where pid=1";
$result =mysql_query ($sql, $connect) or Die ("SQL statement cannot be queried". Mysql_error ());
$nums =mysql_num_rows ($result);
echo "Nums is:". $nums;
while ($res =mysql_fetch_array ($result)) {
echo $res [0];
}

The original is $result repeated.

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