title: Associate a php function to a submit button created using Visual Composer
body: <p>I have created a custom form using Visual composer in wordpress with two fields</p>
  
  <p>1) Name
  2) Email Address</p>
  
  <p>Now on clicking submit button i want to store these values in session variables. I have created the function for the same. How cn i associate the function with the button.</p>