New from his blog Brendon has a list of what he thinks are ten PHP functions you'll never use.
When scripting in PHP, we often restrict ourselves to a limited number of API functions: the common ones, like print(), header(), define(), isset(), htmlspecialchars(), etc. [...] The PHP API actually offers a lot of functionality, some useless and some useful; often seldom used. I have been looking through the available functions and was interested to find some really cool functions that I should have known about.
Here's his list of functions, some of which are more on the "special needs" list than the "never use" list:
