help, please

[Marcial Comerón Mariño <marcial@manza.grm.onat.gov.cu>]

Hi all
I'm new with php.
I need connect with my db in oracle7.3.3, and doing it:
<?php 

putenv("ORACLE_SID=my_sid"); 

putenv("ORACLE_HOME=my_path_home"); 

$handle = ora_plogon("user", "ssword")or die; 

$cursor = ora_open($handle); 

ora_commitoff($handle); 

$query = "insert into my_tab values ( )..."; 

ora_parse($cursor, $query) or die; 

ora_exec($cursor); 

?>

But not work.

thank's and regards