Question

PHP Fatal error: Call to a member function query() on a non-object in F

Answer 1

XXX -> query()
里边的XXX不是对象，或是XXX对象初始化失败。

追问

$db=mssql_connect("XXX","XXX","XXX") or die ("can not Connect to Database");
mssql_select_db("XXX");
echo "Success....";
$rows = $db->query('SELECT * FROM rainday');
那该怎么改 $rows？

追答

$link = mssql_connect("XXX","XXX","XXX");

if (!$link || !mssql_select_db("XXX", $link)) {
die('Unable to connect or select database!');
}

$rows = mssql_query('SELECT * FROM rainday');

foreach($row = mssql_fetch_array($rows))
{
var_dump($row);
}

Answer 2

mssql_select_db("XXX");

这个语句应该这样写：
mssql_select_db("XXX",$db);