title: Why do people say require_once is slower than require?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/186338/why-is-require-once-so-bad-to-use">Why is require_once so bad to use?</a>  </p>
  </blockquote>
  
  
  
  <p>When PHP is including a file I assume it stores the file name inside a array. </p>
  
  <p>Then, when including another file, it will check that array to see if it's already included, right?</p>
  
  <p>So what's the big deal here? Why are people so scared of this array check? It's not like you're including milions of files...</p>
  
  <p>in_array checks are made all the time. I use them in almost all functions :)</p>