[PHP] odbc_exec

[mistknight]

I'm having trouble executing queries using odbc. Here's what I use:
 
 define("NEED_REPLY", true);
 $con = 0;
 
 function con()
 {
  $con = odbc_connect("rest","DBA","SQL");
  odbc_autocommit($con, true);
 }
 function query($query, $reply_expected = false)
 {
  $reply = odbc_exec($con, $query);
  if ($reply_expected == true)
   return $reply;
 }
 
 $query = "select * from user";
 $result = query($query, NEED_REPLY);
 while ($row = odbc_fetch_array($result))
 {
  echo "<REPLY>".$row["username"]."</REPLY>";
 }
 
I get:
 
Warning: odbc_exec(): supplied argument is not a valid ODBC-Link resource in 
c:\inetpub\wwwroot\HakayaFiles\sybase.php on line 13

Warning: odbc_fetch_array(): supplied argument is not a valid ODBC result resource in 
c:\inetpub\wwwroot\HakayaFiles\query.php on line 7

Please HELP!

                
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