How to use php ajax to implement batch deletion function

php Ajax method to implement batch deletion: first introduce the bootstrap modal box and database table; then create the html part of the "batch delete" button; and finally connect ajax to the PHP processing page for batch deletion.

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PHP jQuery Ajax combined with write batch deletion function

For the sake of beauty, I still introduced the bootstrap modal box. What I introduced was a table in my own database library named: The maninfo table is a personal information table. I will not load the table. Written, it is relatively simple, just write the required buttons and html parts

<button type="button" class="btn btn-primary"  id="plscdz" >批量删除</button>

Select all:

<input type="checkbox" id="cq"/>

The traversed check boxes are

<input type="checkbox" value="{$v[0]}" class="cq"/>

First After clicking the Select All button, you can select all the traversed check boxes

<script type="text/javascript">
 $("#cq").click(function(){
$(".cq").prop("checked",$(this).prop("checked"));
})
</script>

Here I only wrote a simple modal box

<div class="modal fade" id="myModal11" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
          <div class="modal-dialog">
            <div class="modal-content">
              <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">
                  ×
                </button>
                <h4 class="modal-title" id="myModalLabel">
                  提示
                </h4>
              </div>
              <div id="qrnr1" class="modal-body">
                您将删除选中的图书！
              </div>
              <div class="modal-footer">
                <button id="qxplsc" type="button" class="btn btn-default" data-dismiss="modal">取消删除</button>
                <button id="qrplsc" type="button" class="btn btn-primary">确认批量删除</button>
              </div>
            </div><!-- /.modal-content -->
          </div><!-- /.modal -->
        </div>
      </div>

In this way, the content of the front end is completed, so I started writing the js part. I used all jquery

var chk = "";
  var check2 = "";
  //判断多个复选框中的某一个是否被实现
  function checked(){
    var count = 0;
    var checkx = $("#cq");
    if(checkx.checked)
    {
      check2=1;//选中全选按钮
    }
    else
    {
      check2=0;//没选中全选按钮
    }
    var checkArry = $(".cq");
    for (var i = 0; i < checkArry.length; i++)
    {
      if(checkArry[i].checked == true)
      {
        //选中的操作
        count++;
      }
    }
    if( count == 0 )
    {
      chk=0;//没有选中项
    }
    else
    {
      chk=1;//有选中项
    }
    //alert(chk);
  }
  function plscdzxx()
  {
    //批量删除
    $("#plscdz").click(function(){
      checked();
      if(chk==1 || check2==1){// 提交
        $(&#39;#myModal12&#39;).modal(&#39;show&#39;);
        $("#nqrplsc").click(function(){/*给确认删除按钮加事件*/
          $(&#39;#myModal12&#39;).modal(&#39;hide&#39;);
          //找选中的主键值，用循环遍历选中的主键值
          var cq =$(".cq");
          var plstr ="";
          for(var i=0;i<cq.length;i++)
          {
            if(cq.eq(i).prop("checked"))
            {
              plstr+=cq.eq(i).val()+"&#39;,&#39;";
            }
          }
          plstr= plstr.substr(0,plstr.length-3); //分隔符占3个字符，截取字符串，去掉最后的"&#39;,&#39;"，这样正好匹配SQL语句
          $.ajax({
            async:false,
            url:"plscdz.php",
            data:{plstr:plstr},
            dataType:"TEXT",
            type:"POST",
            success:function(data){
              if(data.trim()=="OK")
              {
                alert("删除成功");
                nload();  //在这里要重新加载一遍页面
              }
              else
              {
                alert("删除失败");
              }
            }
          });
        });
      }
      else if(chk==0)
      {
        // 不提交
        //alert(chk);
        alert("请选择您要删除的内容");
      }
    })
  }

ajax will be connected to the batch deletion processing page. The following is the batch deletion processing page

<?php
session_start();
include("DBDA.class.php");
$db = new DBDA();
if(!empty($_POST["plstr"]))
{
  $plstr = $_POST["plstr"];
  $sql = "delete from maninfo where id in (&#39;{$plstr}&#39;)";
  if($db->Query($sql,0))
  {
    echo "OK";
  }
  else
  {
    echo "NO";
  }
}

Write it here if you want If you try it yourself, it may not work. In this case, you need to adjust the batch deletion method. If there is a loading method before, then just write the batch deletion method directly into the loading method and call it.

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