php site not showing any errors but not displaying anything

Question

i know very little php and have set up a copy of a site (db, sitefiles) in iis that has php installed. run the phpinfo.php page so i know php is running and working. when i go to the homepage index.php i just get a blank page, no errors!!!

any idea how i get to view errors or why this is happening?

Answer 1

 error_reporting(E_ALL);
 ini_set("display_errors", 1);