在PHP文件中添加jquery

Question

I am having a hard time trying to insert jquery code inside my PHP file. This is what I have so far.

</div>
<!-- left -->
<div class="col-lg-6 col-md-6">
  <div id="rightside">
    <img src="images/about/ab1.jpg" style="margin-left: 30px;">
  </div>

This particular code is what I want to fade in when user scrolls down.

Answer 1

Inside your php file

<script>

    var lastScrollTop = 0;
    $(window).scroll(function(event){
       var st = $(this).scrollTop();
       if (st > lastScrollTop){
           $('img').fadeIn();
       }
       lastScrollTop = st;
    });

</script>