PHP-提交按钮，无需刷新即可获得价值

Question

您好，我想获取此输入的值，并使用ajax no database来获取它。 谢谢。 我怎么用ajax做到这一点？

<form method="POST">
   <input type="text" name="input" id="card-code" value='<?php echo $code ?>' class="form-control">

   <input type="text" id="card-pin" value='<?php echo $code2 ?>' class="form-control" maxlength="3">
 </form>

有我的输入，这里是按钮。

           <form action="top-up.php" method="POST"> 


                    </div>
                </div>

                <div class="col-md-6" style="margin-top: -160px">

                        <div class="caption">

                        <div class="jumbotron">

                        <textarea class="form-control text-center" id="scanned-QR" name="lblQrTxt" onchange = "change()"></textarea><br><br><br>

                           <input class="btn btn-primary btn-lg" type="submit" name="btnSubcode" value="PROCESS"></input>
                        </div>

                        </div>
                </div>
            </div>
             </form>

因此最终输出不会刷新页面，并且textarea值将发送到文本框

Answer 1

jQuery表单插件允许您轻松，毫不费力地升级HTML表单以使用AJAX。 主要方法ajaxForm和ajaxSubmit从form元素收集信息，以确定如何管理提交过程。

http://malsup.com/jquery/form/#getting-started

 $(document).ready(function() { // bind 'myForm' and provide a simple callback function $('#myForm').ajaxForm(function() { alert("Thank you for your comment!"); }); }); 

 <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script> <script src="http://malsup.github.com/jquery.form.js"></script> <form id="myForm" action="comment.php" method="post"> Name: <input type="text" name="name" /> Comment: <textarea name="comment"></textarea> <input type="submit" value="Submit Comment" /> </form> 

// prepare Options Object 
var options = { 
    target:     '#divToUpdate', 
    url:        'comment.php', 
    success:    function() { 
        alert('Thanks for your comment!'); 
    } 
}; 

// pass options to ajaxForm 
$('#myForm').ajaxForm(options);

Answer 2

首先，如下重写您的html代码：

<form id="form" action="top-up.php" method="POST"> 


                    </div>
                </div>

                <div class="col-md-6" style="margin-top: -160px">

                        <div class="caption">

                        <div class="jumbotron">

                        <textarea class="form-control text-center" id="scanned-QR" name="lblQrTxt"></textarea><br><br><br>

                           <input class="btn btn-primary btn-lg js-form-submit" type="submit"></input>
                        </div>

                        </div>
                </div>
            </div>
             </form>

然后，您可以像这样编写JS：

$(document).on('click','.js-form-submit', function (e) {
    e.preventDefault();
    var formData = $('#form').serialize();
    var url = $('#form').attr('action');
    $.ajax({
        type: "POST",
        cache: false,
        url: url // Your php url here
        data : formData,
        dataType: "json",
        success: function(response) {
             //var obj = jQuery.parseJSON(response); if the dataType is not specified as json uncomment this
             // do what ever you want with the server response
        },
        error: function() {
          alert('error handling here');
        }
    });
});