Section 7.1. Undocumented Functions

7.1. Undocumented Functions

Despite the fact that the PHP documentation team works around the clock to document the language and all its functions, there are still quite a few functions you will not find in the PHP manual. That is not to say they are unimportantjust that either very few people know how to use them, or no one has had enough time to get around to them yet.

Although several of these functions are discussed in this book, there are probably dozens more still around. A list of all the undocumented functions is available at http://zend.com/phpfunc/nodoku.php. Sometimes the only way to be certain is to look up the source code yourself.