title: PHP - Application config file stored as - ini,php,sql,cached,php class,JSON,php array?
body: <p>I am trying to decide on the best way to store my applications configuration settings. There are so many options.</p>
  
  <p>The majority of applications I have seen have used a simple require and a PHP file that contains variables. There seem to be far more advanced techniques out there. </p>
  
  <p>What have you used?
  What is most efficient?
  What is most secure?</p>