I'm trying to connect to a oracle database using the " Microsoft ODBC for
Oracle " driver with the
followin script:

<?php
$user= "user";
$upasswd="password";
$dsn = "dsn";
$query = "select sysdate from dual";
$conn = odbc_pconnect($dsn, $user,$upasswd );
if (!$conn)
{ print "Connection failed\n</html>";
exit;
}
if ($result = odbc_Exec($conn, $query))
{ print "Query returned : " . odbc_num_rows($result) . " rows";
odbc_result_all($result, "border = 1"); }
?>

And received the following error:
Warning: SQL error: [Microsoft][ODBC driver for Oracle][Oracle]ORA-12154:
TNS:could not resolve
service name, SQL state 08001 in SQLConnect in c:\php\files\p.php on line 6


Can any body help With this error.

Wha i have to set for connecting with oracle using odbc?

Regards,

Angel M.S.F.