title: difference between libraries and helpers in php frameworks
body: <p>if i've got string functions i use a lot, should i put them in a helper class or a library class?</p>
  
  <p>functions like: truncate string if longer than 30 characters, return a random string, make all lower cases and so on. these are functions that i probably don't need to create an object for. it's better to use them as static methods.</p>
  
  <p>should i put them in a library class or a helper class?</p>
  
  <p>when do i know when to put where?</p>