[GENERAL] PostgreSQL connect error

[devi]

Hi Friends,

I wrote a sample php program that connects to PostgreSQL DB.

==> I was able to run the PHP program from the command prompt as postgres user 
& not as anyother user
        $ php pgsql.php

==>  I was not able execute the same file from the web browser.  FATAL ERROR- 
undefined function pg_connect().

How to resolve this issue?  Please help.

Thanks
DEVI.G