PHP and multiple DB doesn`t work

Question

Hi
I've been all day trying to find some clues on how to get data from two SSID on the same server (under Oracle 10g and PHP5 w/oci)
I'll explain:
The Oracle server has two schemas: datos and global.
datos: localhost:1521
SID: datos
global: localhost:1521
SID: global
in PHP this is the connection I'm trying now, after a whola day i tried to simplify to the fullest:
Line:-----
<?php
//STATEMENT 1
@     $link = oci_connect("user","password" ,"localhost"/"global");
echo "oci_fetch_array <br>";
$stmt = ociparse($link, "select rut from USUARIO");
ociexecute($stmt);
     while ($r2 = oci_fetch_array($stmt, OCI_BOTH)) {
          echo $r2['id_usuario'];
OCIFreeStatement($stmt);          
//STATEMENT 2
@     $conn1 = oci_new_connect("user", "password", "localhost"/"datos");
$SQL = "select id_usuario from USUARIO where id_empresa = '2'";
          $stmt = ociparse($conn1,$SQL);
          ociexecute($stmt);
                    while(OCIFetch($stmt)){ 
          $valor = OCIResult($stmt,1);
          echo $valor;
          OCIFreeStatement($stmt);
?>
Both sentences are tested and working so there is no problem in the PHP code.
* I've noticed that no matter what type of code I try, it always seems to only access the bolddatos*bold* schema and never even touches the global schema.
* The errors I get from this code:
Warning: ociparse() expects parameter 1 to be resource, boolean given in D:\www\index.php on line 12
Warning: ociexecute() expects parameter 1 to be resource, null given in D:\www\index.php on line 13
Warning: oci_fetch_array() expects parameter 1 to be resource, null given in D:\www\index.php on line 14
Warning: ocifreestatement() expects parameter 1 to be resource, null given in D:\www\index.php on line 18
after that, I succesfully get the result from the second statement ... so confusing
* In the begining I used the sabe user and password for both schemas, now I've changed them . In that time the error was related to tables that didn't exist so I got to the conclussion that PHP was only accesing the datos schema, as I menctioned before.
I don't know that else to do, and I'm thinking seriously on passing to another language.
I've made a Sw in Java that also access those two databases, it works perfectly, so I'm thinking that perhaps it's me who don't know how to write in PHP, or PHP's OCI that doesn't support this kind of acces to databases.
If somebody could show me some clues I'll be gratefull.

Answer 1

Well actually the @ signs are there so the "PHP Warning: Division by zero" is disabled, still the connection have always worked just fine for me, that's just a warning.
I really don't get the mixture between php4 and php5 as all the functions I used are documented in here http://cl.php.net/oci8.
I've always have this confussion about SID and schemas. As i understand it the schemas are database instances that are identified by an SID. Lets say, the database instance has a global name "no_godzilla", then the SID will be "nogodzilla" (oracle truncates "_" from SID). And that database will have a user and a password to grant the access.
So, the connection string must have a : username, password, SID or global database name and a specified host.
For now the second connection ($conn1) on my php file is working but the first doesn, that even when the sentences are made to be perfectly equals, for that I've created tables in both databases with tha same structure but different data. Still, the only database that seems to work is datos
Yesterday I tried to make the connection from an ODBC but found some trouble on doing that, I've received the following error:
[Oracle][ODBC][Ora]ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
so, I've created a new listener and i was able to start a ODBC from the datos database but still I recieve the message when I try to connect from the other database.
After that I figured out (after reading some forums) that the error was on the listener configuration listener.ora and tnsnames.ora, I found it very troublesome to manually edit those files and after a while I just cracked and fell death on my desktop.
Then I was told to use 3 databases instead of 2, wich made my soul leave my body for a while, and I took that fine oportunity to say "hi" to some people I haven't seen in a while.
On my rebirth I decided to make tree brand new Oracle installations, so the ports on each database are different (this will solve my problem I thougth), but I only came to the same conclussion, PHP can only access one database (from 3 Oracle 10g on the same machine, Ive tested it under Oracle and mysql without problems of this kind).
Now I have 3 listeners and 3 databases, each one on localhost:1521, localhost:1522 and localhost:1523. The listeners work fine but I cant make an ODBC or make my precious code to work.
I must finish this work tomorrow, so I'm switching back to Java. Still in the future I surely will have to deal with this again so, I still ask for some clues, just so i know how to deal with this.
Right now I'll resume reading the Underground oracle and PHP manual (I've read it before but only untill page 120).
Thaks for your time.
P.S. should I post my listener.ora and tnsnames.ora? (6 in total)