title: PHP - Writing your own function VS using built-in functions
body: <p>Are there any advantages using "box" functions, such as <code>array_map</code>, rather than writing your own loop (when you know that the "box" function can't be written in any other way than your own function?</p>
  
  <p>(what for? sometimes it's more readable when the <code>callback</code> function is a custom one)</p>