mod_php3 distributed with RedHat6.0 (fwd)

I am using a php3 interface come with RedHat6.0 CD. But the error when I
open .php3 for connecting to PostgreSQL via a Apache is:

Fatal error: Call to unsupported or undefined function pg_connect() in
myfile.php3 on line 9

myfile.php3 line 9: $conn = pg_connect("dbname=test"); 

Does this mean that mod_php3 package of RedHat6.0 was not compiled with
PostgreSQL library?