@mjdamatoNov 16.2006 — #There are many common PHP apps and CMS systems that have a debug mode written into them (phpBB, phpNuke, etc.). But, I don't believe php has anything built in. Do a search for debug class and you should find something you can use.
@NogDogNov 16.2006 — #There are both configuration settings and PHP functions you can use to control this. [url=[url=http://www.php.net/manual/en/ref.errorfunc.php]This page[/url] is a good place to start to learn about them.