PHP Warning: pg_connect(): Unable to connect to PostgreSQL server: could not connect to server:

PHP Warning:  pg_connect(): Unable to connect to PostgreSQL server:
could not connect to server:
I have setup PHP/Postgres and is running fine upto document root
i.e. /var/www/html, but when i am calling it through a cgi-bin php file
it is giving log error as :
[error] [client 127.0.0.1] PHP Warning:  pg_connect(): Unable to connect
to PostgreSQL server: could not connect to server: \x04\xe6\xe3\xbfPF;

what may be the solution.

--Abdus Samad Ansari