Hello PHP-Team!
I got the "php-3_0_5-win32.zip"-File from your ftp-server and put it into my cgi-bin directory of Apache 1.3 for Windows. First I tried out an ODBC-Connection to the Oracle-Server. This feature works just fine.
Now I should be able to connect direct to the Database (OCI), because of performance-tests.
(php3 and Oracle8 on Linux are working great!)
The sample-script to log on to Oracle:

<? 
  dl("php3_oci73.dll");
  $id = ora_logon("test@orcl", "test");
  if ($id==0) {
    echo ("Connection failed.");
  }
  else {
    echo ("Connection ok.");
  }
?>

Error-Msg:
Warning: Invalid library (maybe not a PHP3 library) 'php3_oci73.dll' in (null) on line 15

Note: If a library such as "php3_calendar.dll" has been loaded, there is no
error message about the *.dll .

Thanks for your effort!

Alex Navarrete 

STILL THE SAME PROBLEM:
I have installed Oracle 7.3 Client (with Oracle Call Interface 7.3.2.1.0)
I use a dedicated Oracle8 Server.
I can reach the Server via SQL*Plus3.3.
But the error message  is still the same.
I also tried out the ociw32.dll file without success.

SUCCESS:
I took the following distribution and it works just fine.

"www.php.net/distributions/php-3.0.6-dev-win32.zip"

The "php3_oci73.dll" was wrong.