title: Is it possible to call a PHP function from js file?
body: <p>Is there any way I can call a PHP function from jQuery? I have a .js file and a .php file.</p>
  
  <p>I have a jQuery event applied on a button click. Now I want to set a condition on what happens next when the button is clicked depending on whether a user is logged in or not. Is there any way I can do this from my .js file ?</p>