Thanks for the reply.
error_reporting is already set to "E_ALL" and current local & master values displaying on the browser is 22527
display_errors and display_startup_errors i have changed to ON and took a restart of Apache services.
Now i am getting below error: Fatal error: Call to undefined function oci_connect() in php page on line 14
The php page is working fine when using directly from the server, even the connection string is working fine when used from the server, i am getting the SQL output as desired. Unfortunately it is erring out in browser.
PN: the DB i am connecting to is on Oracle RAC