pear DB 提示Call to undefined function: query()

Question

try this:
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$dsn = CFP_DATABASE_TYPE."://".CFP_DATABASE_USERNAME.":".CFP_DATABASE_PASSWORD."@".CFP_DATABASE_HOST.":".CFP_DATABASE_PORT."/".CFP_DATABASE_NAME;
$options = array(
           'debug'       => 2,
           'portability' => DB_PORTABILITY_ALL,
       );
$db = DB::connect($dsn,$options);
if(DB::isError($db)) dir($db->getMessage());
$sql = "select * from picin";
$result = $db->query($sql);
if(DB::isError($result)) die($result->getMessage());
while ($row = $result->fetchRow()) 
{
$title = $row["title"];
echo "title=$title";
echo "<br>";
}
$db->disconnect();