title: When it is necessary to use Classes in PHP
body: <p>I am a wordpress plugin developer. I saw the source of many pluginsand many plugin use "classes" in them and some without classes. </p>
  
  <p>Many huge coded plugins like "wp-postratings" does not use Classes and some small plugins use Classes.</p>
  
  <p>edit: 
  Since classes have private, public and protected access specifiers, i feel a taste of security
  Does it increase security?</p>
  
  <p>Other than PHP does other languages require classes ?</p>
  
  <p>Is it compulsory to use Classes ? </p>
  
  <p>I need some suggestions.</p>