php to send emails using exim?

Not sure how to accomplish this, and yes I have read every post on Exim's website and scoured google for examples of sending emails from php using the exim mail server. What I have done this far to try and get it to work... changed php.in sendmail path to a symlink of sendmail which points to the current exim binary, and call the mail() function from php. tried to do a system() to the exim binary as well as exec("/path/to/exim -io -T, $msg") All with no luck, could anyone give me an example of how to accomplish this? Jas