基于ajax实现点击加载更多无刷新载入到本页

先给大家展示效果图：

效果演示

本例是分页的另外一种显示方式,并不是隐藏未显示的内容

数据库结构与《ajax 翻页》是一样的

JavaScript 代码

<script type="text/javascript">
$(document).ready(function() {
  var track_click = ; //track user click on "load more" button, righ now it is click
  var total_pages = <?php echo $total_pages; ?>;
  $('#results').load("fetch_pages.php", {'page':track_click}, function() {track_click++;}); //initial data to load
  $(".load_more").click(function (e) { //user clicks on button
    $(this).hide(); //hide load more button on click
    $('.animation_image').show(); //show loading image
    if(track_click <= total_pages) //make sure user clicks are still less than total pages
    {
      //post page number and load returned data into result element
      $.post('fetch_pages.php',{'page': track_click}, function(data) {
        $(".load_more").show(); //bring back load more button
        $("#results").append(data); //append data received from server
        //scroll page to button element
        $("html, body").animate({scrollTop: $("#load_more_button").offset().top}, );
        //hide loading image
        $('.animation_image').hide(); //hide loading image once data is received
        track_click++; //user click increment on load button
      }).fail(function(xhr, ajaxOptions, thrownError) {
        alert(thrownError); //alert any HTTP error
        $(".load_more").show(); //bring back load more button
        $('.animation_image').hide(); //hide loading image once data is received
      });
      if(track_click >= total_pages-)
      {
        //reached end of the page yet? disable load button
        $(".load_more").attr("disabled", "disabled");
      }
     }
    });
});
</script>

XML/HTML代码

<div id="results"></div>
<div align="center">
<button class="load_more" id="load_more_button">load More</button>
<div class="animation_image" style="display:none;"><img src="ajax-loader.gif"> Loading...</div>
</div> 

 fetch_pages.php

 php代码

<?php
include("conn.php");
$item_per_page = 3;
//sanitize post value
$page_number = filter_var($_POST["page"], FILTER_SANITIZE_NUMBER_INT, FILTER_FLAG_STRIP_HIGH); 

//throw HTTP error if page number is not valid
if(!is_numeric($page_number)){
  header('HTTP/1.1 500 Invalid page number!');
  exit();
} 

//get current starting point of records
$position = ($page_number * $item_per_page); 

//Limit our results within a specified range.
$results = mysql_query("SELECT * FROM content ORDER BY id DESC LIMIT $position, $item_per_page"); 

//output results from database
echo '<ul class="page_result">';
while($row = mysql_fetch_array($results))
{
  echo '<li id="item_'.$row["id"].'"><span class="page_name">'.$row["id"].') '.$row["name"].'</span><span class="page_message">'.$row["message"].'</span></li>';
}
echo '</ul>';
?> 

以上内容是小编给大家介绍的基于ajax实现点击加载更多无刷新载入到本页，希望大家喜欢。