title: What use is lambda in PHP?
body: <p>The lambda anonymous function is part of PHP 5.3. What use does it have? Is there anything that one can only do with lambda? Is lambda better for certain tasks? </p>
  
  <p>I've seen the Fibonacci example, and I really don't need to write Fibonacci sequences, so I'm still not sure if it's that useful for the kinds of tasks I encounter in writing webbish applications. So what does one do with it in "real life"?</p>