Implementation of Ajax pagination using PHP JQuery_jquery

In order to practice JQuery, I decided to write paging myself

The final effect is as shown below:

After clicking on a letter, all words starting with that letter will be displayed below;

Page display, each page displays 15 words, each group of page numbers has 20, 1-20/20-40~~~

The first is the paging Pager related code in the PHP file

Copy the code The code is as follows:

public function searchWordsByInitial()
{
//Get parameters from the URL sent by AJAX: the letters clicked by the user and the page number clicked
$initial = htmlentities($_POST['initial'], ENT_QUOTES,"UTF-8");
$page = htmlentities($_POST['page'], ENT_QUOTES,"UTF-8");
$words = $this->_createWordObj();

                                                                                                                                               $perPageNum 1;
                                                                                                                                                        as $key => $word ){
                                                                     
                                                                                                                                                                                                                 //If the total data The amount is less than $PageSize, then there is only one page
                                                                                                                                                                                                                   (int)($sumNum/$perPageNum) 1; //If there is no remainder , then the number of pages is equal to the total amount of data divided by the number of pages
}
}
else{
$pageNums = 0; }

                                                                                                                                                                                                     

                                                                                  $tab_str.=" 🎜>

Copy code The code is as follows:

public function init_searchWordsByInitial_Pager($sumNum,$pageNums,$page ; (($page-1)/20)*20 1;

                                 $tab_str="

";

for($k=0;$k<=19;$k )
{
$j=$k $current_first_page;
$tab_str.="".$j."";
}

$tab_str.="

A total of".$ sumNum." words, ".$pageNums."page

"; }


init.js Related JQuery code, responding to user actions

Copy code

The code is as follows :

//初始化分页 Pager

    var pageNums;//总页数
    var sumNums;//总记录数

      function init_searchWordsByInitial_Pager(){

            pageNums=$("#pageNums").html();//JS从页面HTML获取
            sumNums=$("#sumNums").html();
            if(pageNums==1)//如果只有一页，则隐藏Pager
            {
                $("#searchWordsByInitial_Pager").html("
");
            }
            //让页码的默认值为1，默认显示的是第一页；
            if(page_initial==undefined){ page_initial=1;}

            //当页面过多时，我们一组只显示20个页码，后面缀一个NEXT按钮，点击后可以显示后面20个页码；同样，LAST按钮可以显示前面20个按钮
            $("#searchWordsByInitial_Pager ul button:eq(19)").after("Next");
            $("#searchWordsByInitial_Pager ul button:eq(0)").before("Last");

            //如果最后一组少于21页，那么就隐藏最后一个页码后面的，包括NEXT按钮【pageNums<21】
            //如果用户点击的page是最后20个page，那么也要隐藏最后一个页码后面的，包括NEXT按钮【offset<20】
            //（由于点击page会触发本初始化函数/其实可以将初始化函数的调用仅仅绑定到单击字母事件即可，不必跟Ajax动作绑在一起）

           
            var offset;
            offset=(Math.ceil(pageNums/20)*20)-parseInt(page_initial);

            if(pageNums<21||offset<20)
            {

                $("#searchWordsByInitial_Pager ul button").slice((pageNums%20)+1).hide();

            }
            //如果正好是20页，根据上一段代码，offset=19<20，会把整个Pager隐藏；需要再把它显示出来
            if(search_pageNums==20)
            {
                        $("#searchWords_Pager ul button.not_more_btn").show();
            }

            //如果当前组的第一个page是1，那么隐藏LAST按钮；否则显示LAST按钮，允许用户点击翻到上一组
            if($("#searchWordsByInitial_Pager ul button.not_more_btn").eq(0).html()==1)
            {
                        $("#searchWordsByInitial_Pager ul button:eq(0)").hide();
            }
            else
            {
                        $("#searchWordsByInitial_Pager ul button:eq(0)").show();
            }
      }

        //单击NEXT按钮
        $("#more_forward").live("click",function(event){

                //只要有往后翻页，就会有 Last 按钮
                $("#searchWordsByInitial_Pager ul button:eq(0)").show();

                //让每一个page都自加20，如1-20变为21-40
                for(i=0;i<20;i++){
                    $("#searchWordsByInitial_Pager ul button.not_more_btn").eq(i).html(parseInt($("#searchWordsByInitial_Pager ul button.not_more_btn").eq(i).html())+20);

                    //隐藏最后一个页码后面的按钮
                    if($("#searchWordsByInitial_Pager ul button.not_more_btn").eq(i).html()==pageNums)
                    {
                            $("#searchWordsByInitial_Pager ul button").slice(i+2).hide();
                    }

                       
               }

              })

        //单击LAST按钮
        $("#more_backword").live("click",function(event){

                //首先要让20个按钮都显示出来
                $("#searchWordsByInitial_Pager ul button").show();
                for(i=0;i<20;i++){
                    $("#searchWordsByInitial_Pager ul button.not_more_btn").eq(i).html(parseInt($("#searchWordsByInitial_Pager ul button.not_more_btn").eq(i).html())-20);

               }

                //判断是否要隐藏Last按钮
                if($("#searchWordsByInitial_Pager ul button.not_more_btn").eq(0).html()==1)
                {
                        $("#searchWordsByInitial_Pager ul button:eq(0)").hide();
                }
                else
                {
                        $("#searchWordsByInitial_Pager ul button:eq(0)").show();
                }

              })

       

  
   //获取用户点击的字母
   $(".initial-button-list button").live("click", function(event){
            //清除所有字母A-Z按钮的active class，并且设置点击的字母按钮为 active；这里不要使用 .attr 和 .removeAttr；
            $(".initial-button-list button").removeClass("active");
            $(this).addClass("active");

           
            //获取当前点击的字母和页码
            initial_value = $(this).html();
            page_initial=1;

            //将要传送的参数拼串 &action=list_by_initial&initial=O&page_initial=3
            btnData = "&action=list_by_initial"+ "&initial="+initial_value+"&page="+page_initial;
            $.ajax({
               type: "POST",
               url: processFile,
               data: btnData,
               success: function(data) {
                    $("#word_table_by_initials").show();
                    $("#word_table_by_initials").html("");
                    $("#word_table_by_initials").html(data);
                    init_searchWordsByInitial_Pager();

               },
                error: function(msg)
                {
                        alert(msg);
                }
            });
   });

  

   //获取用户点击的页码(除去点击 more 按钮)
   $("#searchWordsByInitial_Pager button.not_more_btn").live("click", function(event){
            //清除所有页码的active class，并且设置点击的页码为 active；这里不要使用 .attr 和 .removeAttr；
            $("#searchWordsByInitial_Pager button").removeClass("active");
            $(this).addClass("active");

            //获取当前点击的页码
            page_initial=$(this).html();

            //将要传送的参数拼串 &action=list_by_initial&initial=O&page_initial=3
            btnData = "&action=list_by_initial" "&initial=" initial_value "&page=" page_initial;
            $.ajax({
               type: "POST",
               url: processFile,
               data: btnData,
               success: function(data) {
                    $("#word_list_by_initials").hide();
                    $("#word_table_by_initials").html("");
                    $("#word_table_by_initials").html(data);
                    init_searchWordsByInitial_Pager();

               },
                error: function(msg)
                {
                        alert(msg);
                }
            });
   });   
});

一些注意事项：

1，$("div button.not_more_bt")中，前两个选择器之间是有空格 的，后两个没有；因为最后一个是 类选择器，要直接跟在button后面

2，.html() .val() .text()  的区别

3，:eq(index),:lt(index);gt(index) 中的 index 是从0开始，而且不能为变量，必须为 数字

如果需要让用到动态的 index，可以用

复制代码 代码如下:

.eq(i)

4，var a=20;

var b=10;

var c;

c=a b;

结果不是 30！是2020！

正确的写法是 c=parseInt(a) _parseInt(b);

减法没事，但是最好也要转化一下

PHP 的 函数是 intval();

5，写代码之前，一定要规划好最优的方案，否则重头来就更费事了

6，JS代码和HTML加载的逻辑顺序