Easiest and shortest way?

I am getting ready to write some PHP code that will involve the following:

[1] make a connection to a Postgres DB via PHP/Apache
[2] query a table for records. only get new records that we didn't get last
    query. guess I'll have to set some sort of flag.
[3] email the results to the requestor

My question is without reinventing the wheel, what the shortest code that I can
write.