title: Php Allowable uploaded file extension
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2486329/how-can-i-only-allow-certain-filetypes-on-upload-in-php">How can I only allow certain filetypes on upload in php?</a>  </p>
  </blockquote>
  
  
  
  <p>i'm learning PHp and Mysql. I want to create a function that allow only specific file extension which uploaded by user. Like..</p>
  
  <pre><code>$whitelist = array("jpg","jpeg","gif","png","bmp","pdf" );
  </code></pre>
  
  <p>So how do i check this specific file extension with php. Can anyone tell me please..
  Thank you. </p>