Call to undefined function: pg_connect().

hello all,
i was running postgresql-7.4.2 and php-4.3.7 and
apache-2.0.49 on RH-7.3. but the php script is unable
to connect tp pgsql.

<? php
$connect=pg_connect("host=localhost port=5432
dbname=DATABASENAME");
?>

this shows error as: Fatal error: Call to undefined
function: pg_connect().
how can i sort this.
thanks in advance.



_______________________________
Do you Yahoo!?
Declare Yourself - Register online to vote today!
http://vote.yahoo.com