How to implement batch deletion in php ajax

php Ajax method to implement batch deletion: first click the select all button and select all the traversed check boxes; then make ajax request to the php processing page for batch deletion; finally implement batch deletion through if statements That’s it.

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By exchanging a small amount of data with the server in the background, Ajax can make Web pages are updated asynchronously. This means updating a portion of a web page without reloading the entire page.

First click the Select All button to select all the traversed check boxes

$("#cq").click(function () {
    $(".cq").prop("checked", $(this).prop("checked"));
})

js part, using jquery

var chk = "";
var check2 = "";  //判断多个复选框中的某一个是否被全选
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
    }
}
function all() {
    //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;"
                $.ajax({
                    async: false,
                    url: "aa.php",
                    data: {id: plstr},
                    dataType: "TEXT",
                    type: "POST",
                    success: function (data) {
                        if (data.trim() == "OK") {
                            alert("删除成功");
                        } else {
                            alert("删除失败");
                        }
                    }
                });
            });
        } else if (chk == 0) {
            alert("请选择您要删除的内容");
        }
    })
}

ajax to request the php processing page for batch deletion. The following is the processing page for batch deletion

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

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