Php 如何将AJAX响应作为更新发布给所有登录用户

我现在有一段代码只针对一个用户发布，我想知道是否有可能，ajax响应可以作为更新发布给所有登录用户，作为网站上的更新。我感谢所有的努力

<form method="post" action="" id="postForm">
<input type="hidden" name="userId" id="userId" value="<?php echo $_SESSION['USERID']; ?>" />
    <select name="type" class="form-control" style="border:1px solid #eee; border-radius:5px; width:auto !important;">
    <option value="">select type of post</option>
    <option value="default">Normal Post</option>
    <option value="Testimonies">Testimonies</option>
    <option value="Prayer">Prayer Request</option>
    <option value="counselling">Counselling</option>
    <option value="Dreams">Dreams Interpretation</option>
    </select>
    <textarea class="form-control" style="border:none; resize:none;" rows="1" name="post" id="post" placeholder="What's God saying through you today? <?php $text = explode(' ', $_SESSION['NAME']); echo $text[0]; ?>"></textarea>

      <button type="submit" value="postForm" class="submitIt btn btn-info btn-flat">Post</button>

  </form>

“作为网站上的更新”这句话对我们来说没有任何意义，除非我们确切地知道您正在“更新”什么，以及这会对用户产生什么影响。您需要实现web服务池，并将其集成到所有页面上，将web服务池化并处理响应，或者使用推送服务当用户在网站上发表帖子时，我只希望该帖子显示在所有登录用户的页面上。这对你来说清楚了吗@GrumpyCrouton
<script>
 $(document).ready(function(){                         
 $( "body" ).delegate( ".submitIt", "click", function(e) {
 e.preventDefault(); 
 e.stopPropagation(); 
 //the button value 
 $url = "http://localhost/christ/ajaxPages/";
 var buttonValue = $(this).val();
 //alert(buttonValue);
 if(buttonValue == "postForm") {
 var formdata = $('#postForm').serialize();
 //alert(formdata);
  $.ajax({
  type: "POST",
  url: $url + "addit.php",
  data: formdata,
  success: function(data){
  $("#discuss").append(data);
  $("#post").each(function(){autosize.destroy(this);});
  $("#post").val("");
   }
    })
       });
 </script>

<?php
 include '.././config.php';
     //waste in dispose
     $arr[] =0;
 $db_con = connect();
$sect =  $_POST['post'];
$type = $_POST['type'];
$userId = $_POST['userId'];
$date = date('Y-m-d H:i:s');
//time of psoidting
$time = strtotime($date);
 $sql = "insert into post(post_body,userId,post_type,date) values(:data,:userId,:type,:dateposted)";
$bio = $db_con->prepare($sql);
$bio->bindParam('data', $sect);
$bio->bindParam('type', $type);
$bio->bindParam('userId', $userId);
$bio->bindParam('dateposted', $date);
$bio->execute();
  $arr = $bio->errorInfo();
   if($arr[2] == "") {
    $disc =  $db_con->prepare("select * from post where post_body = :text and userId = :userId");
         $disc->bindParam("text", $sect);
         $disc->bindParam('userId', $userId);
         $disc->execute();
         $row = $disc->fetch();
         $_SESSION['postId'] = $row['post_id'];
   //let us retrive 
echo '<!-- Box Comment -->
      <div class="box box-widget" id="lofty-'.$row['post_id'].'">
      <div class="box-header with-border" style="border-radius:5px 5px 0 0;">
          <div class="user-block">
            <img class="img-circle" src="'.$url.'/'.userName('icon', $_SESSION['USERID']).'" alt="User Image">
            <span class="username"><a style="color:#1da1f2;" href="#">'.ucfirst($_SESSION['NAME']).'</a></span>
           <span class="description">Shared - ';
           echo humanTiming($time);
           echo '</span>
          </div>
           <!-- /.user-block -->
          <div class="box-tools">';
           if($row['userId'] == $_SESSION['USERID']) { 
          echo '<div class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown"><span style="color:#fff">Dropdown Example</span>
<span class="caret"></span></a>
<ul class="dropdown-menu shadow">
  <li><a href="#"><button type="button" data-toggle="modal" data-target="#editModal" class="btn btn-box-tool edit" id="edit-post-'.$row['post_id'].'"><i class="fa fa-edit"></i>&nbsp;&nbsp;Edit</button></li>
  <li><a href="#"><button type="button" class="btn btn-box-tool submitIt" value="delete" name="del-'.$row['post_id'].'-'.$_SESSION['USERID'].'-post"><i class="fa fa-trash-o"></i>&nbsp;&nbsp;Delete</button></a></li>
</ul>
</div>'; 
 }
          echo '</div>
          <!-- /.box-tools -->
        </div>
        <!-- /.box-header -->
        <div class="box-body">
          <p style="white-space:pre-wrap";><span id="replace-'.$row['post_id'].'">'.$sect.'</span></p>
          <div style="margin-left:-10px; margin-right:-10px; padding:4px 4px 0 4px;">
          <div class="col-lg-6" style="text-align:left">
          <span class="text-muted">       
    <button style="background:none; border:none;" class="btn btn-box-tool BigLike" name="like-'.$row['post_id'].'-'.$_SESSION['USERID'].'">
          <i class="fa fa-thumbs-o-up"></i> <span id="change'.$row['post_id'].'"></span></button>
          <span id="seeIt'.$row['post_id'].'"></span><span id="seeItbefore'.$row['post_id'].'"></span></span>
          </div>
           <div class="col-lg-6" style="text-align:right">
           <span class="text-muted">
          <span id="seeIt2'.$row['post_id'].'"></span><span id="seeItbefore2'.$row['post_id'].'"></span>
           </div> 
          </div>
        </div>
        <!-- /.box-body -->
        <div class="box-footer box-comments" style="background:none; margin:0;" id="comment'.$row['post_id'].'"></div>
        <!-- /.box-footer -->
        <div class="box-footer" style="border:none; padding-top:1px;">
          <form action="." method="post">
          <img class="img-responsive img-circle img-sm" src="'.$url.'/'.userName('icon', $_SESSION['USERID']).'" alt="user image">
            <!-- .img-push is used to add margin to elements next to floating images -->
            <div class="img-push">
            <textarea type="text" style="border-radius:20px; background:#eee; border:none; resize:none; overflow:hidden" rows="1" class="form-control input-sm comment-'.$_SESSION['USERID'].'" name="comment-'.'3-'.$row['post_id'].'-'.$_SESSION['USERID'].'"  placeholder="Press enter to post comment"></textarea>
            </div>
          </form>
        </div>
        <!-- /.box-footer -->
        </div>
        <!-- /.box-widget -->         
         <!-- /.box -->';
    } else  {
      echo 'Failed';    
      } 
   ?>