我试图将数据从表单发送到数据库。这是我使用的形式:

<form name="foo" action="form.php" method="POST" id="foo">
    <label for="bar">A bar</label>
    <input id="bar" name="bar" type="text" value="" />
    <input type="submit" value="Send" />
</form>

典型的方法是提交表单,但这会导致浏览器重定向。使用jQuery和Ajax,是否有可能捕获所有表单的数据并将其提交给PHP脚本(例如,form. PHP)?


当前回答

在提交前和提交成功后处理Ajax错误和加载器显示了一个警报引导框的示例:

var formData = formData;

$.ajax({
    type: "POST",
    url: url,
    async: false,
    data: formData, // Only input
    processData: false,
    contentType: false,
    xhr: function ()
    {
        $("#load_consulting").show();
        var xhr = new window.XMLHttpRequest();

        // Upload progress
        xhr.upload.addEventListener("progress", function (evt) {
            if (evt.lengthComputable) {
                var percentComplete = (evt.loaded / evt.total) * 100;
                $('#addLoad .progress-bar').css('width', percentComplete + '%');
            }
        }, false);

        // Download progress
        xhr.addEventListener("progress", function (evt) {
            if (evt.lengthComputable) {
                var percentComplete = evt.loaded / evt.total;
            }
        }, false);
        return xhr;
    },
    beforeSend: function (xhr) {
        qyuraLoader.startLoader();
    },
    success: function (response, textStatus, jqXHR) {
        qyuraLoader.stopLoader();
        try {
            $("#load_consulting").hide();

            var data = $.parseJSON(response);
            if (data.status == 0)
            {
                if (data.isAlive)
                {
                    $('#addLoad .progress-bar').css('width', '00%');
                    console.log(data.errors);
                    $.each(data.errors, function (index, value) {
                        if (typeof data.custom == 'undefined') {
                            $('#err_' + index).html(value);
                        }
                        else
                        {
                            $('#err_' + index).addClass('error');

                            if (index == 'TopError')
                            {
                                $('#er_' + index).html(value);
                            }
                            else {
                                $('#er_TopError').append('<p>' + value + '</p>');
                            }
                        }
                    });
                    if (data.errors.TopError) {
                        $('#er_TopError').show();
                        $('#er_TopError').html(data.errors.TopError);
                        setTimeout(function () {
                            $('#er_TopError').hide(5000);
                            $('#er_TopError').html('');
                        }, 5000);
                    }
                }
                else
                {
                    $('#headLogin').html(data.loginMod);
                }
            } else {
                //document.getElementById("setData").reset();
                $('#myModal').modal('hide');
                $('#successTop').show();
                $('#successTop').html(data.msg);
                if (data.msg != '' && data.msg != "undefined") {

                    bootbox.alert({closeButton: false, message: data.msg, callback: function () {
                            if (data.url) {
                                window.location.href = '<?php echo site_url() ?>' + '/' + data.url;
                            } else {
                                location.reload(true);
                            }
                        }});
                } else {
                    bootbox.alert({closeButton: false, message: "Success", callback: function () {
                        if (data.url) {
                            window.location.href = '<?php echo site_url() ?>' + '/' + data.url;
                        } else {
                            location.reload(true);
                        }
                    }});
                }

            }
        }
        catch (e) {
            if (e) {
                $('#er_TopError').show();
                $('#er_TopError').html(e);
                setTimeout(function () {
                    $('#er_TopError').hide(5000);
                    $('#er_TopError').html('');
                }, 5000);
            }
        }
    }
});

其他回答

我使用这个简单的一行代码多年没有问题(它需要jQuery):

<script src="http://malsup.github.com/jquery.form.js"></script> 
<script type="text/javascript">
    function ap(x,y) {$("#" + y).load(x);};
    function af(x,y) {$("#" + x ).ajaxSubmit({target: '#' + y});return false;};
</script>

这里ap()表示Ajax页面,af()表示Ajax表单。在表单中,只需调用af()函数即可将表单发送到URL,并在所需的HTML元素上加载响应。

<form id="form_id">
    ...
    <input type="button" onclick="af('form_id','load_response_id')"/>
</form>
<div id="load_response_id">this is where response will be loaded</div>

在你的php文件中输入:

$content_raw = file_get_contents("php://input"); // THIS IS WHAT YOU NEED
$decoded_data = json_decode($content_raw, true); // THIS IS WHAT YOU NEED
$bar = $decoded_data['bar']; // THIS IS WHAT YOU NEED
$time = $decoded_data['time'];
$hash = $decoded_data['hash'];
echo "You have sent a POST request containing the bar variable with the value $bar";

在你的js文件中发送一个带有数据对象的ajax

var data = { 
    bar : 'bar value',
    time: calculatedTimeStamp,
    hash: calculatedHash,
    uid: userID,
    sid: sessionID,
    iid: itemID
};

$.ajax({
    method: 'POST',
    crossDomain: true,
    dataType: 'json',
    crossOrigin: true,
    async: true,
    contentType: 'application/json',
    data: data,
    headers: {
        'Access-Control-Allow-Methods': '*',
        "Access-Control-Allow-Credentials": true,
        "Access-Control-Allow-Headers" : "Access-Control-Allow-Headers, Origin, X-Requested-With, Content-Type, Accept, Authorization",
        "Access-Control-Allow-Origin": "*",
        "Control-Allow-Origin": "*",
        "cache-control": "no-cache",
        'Content-Type': 'application/json'
    },
    url: 'https://yoururl.com/somephpfile.php',
    success: function(response){
        console.log("Respond was: ", response);
    },
    error: function (request, status, error) {
        console.log("There was an error: ", request.responseText);
    }
  })

或者保持表单提交的原样。只有当您希望发送带有计算附加内容的修改过的请求,而不仅仅是一些由客户机输入的表单数据时,才需要这种方法。例如哈希、时间戳、用户id、会话id等等。

自从引入了Fetch API,就没有理由再用jQuery Ajax或xmlhttprequest来实现了。要POST表单数据到php脚本在香草JavaScript你可以做以下:

异步函数postData() { 尝试{ Const res = await fetch('../php/contact.php', { 方法:“文章”, new FormData(document.getElementById('form')) }) if (!res.ok)抛出新的错误('网络响应不正常'); } catch (err) { console.log (err) } } <form id="form" action="javascript:postData()" > <input id="name" name="name" placeholder=" name" type="text" required> <input type="submit" value=" submit" > > < /形式

下面是一个非常基本的php脚本示例,它获取数据并发送电子邮件:

<?php
    header('Content-type: text/html; charset=utf-8');

    if (isset($_POST['name'])) {
        $name = $_POST['name'];
    }

    $to = "test@example.com";
    $subject = "New name submitted";
    $body = "You received the following name: $name";
    
    mail($to, $subject, $body);

我使用如下所示的方法。它像文件一样提交所有东西。

$(document).on("submit", "form", function(event)
{
    event.preventDefault();

    var url  = $(this).attr("action");
    $.ajax({
        url: url,
        type: 'POST',
        dataType: "JSON",
        data: new FormData(this),
        processData: false,
        contentType: false,
        success: function (data, status)
        {

        },
        error: function (xhr, desc, err)
        {
            console.log("error");
        }
    });
});

HTML:

    <form name="foo" action="form.php" method="POST" id="foo">
        <label for="bar">A bar</label>
        <input id="bar" class="inputs" name="bar" type="text" value="" />
        <input type="submit" value="Send" onclick="submitform(); return false;" />
    </form>

JavaScript:

   function submitform()
   {
       var inputs = document.getElementsByClassName("inputs");
       var formdata = new FormData();
       for(var i=0; i<inputs.length; i++)
       {
           formdata.append(inputs[i].name, inputs[i].value);
       }
       var xmlhttp;
       if(window.XMLHttpRequest)
       {
           xmlhttp = new XMLHttpRequest;
       }
       else
       {
           xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
       }
       xmlhttp.onreadystatechange = function()
       {
          if(xmlhttp.readyState == 4 && xmlhttp.status == 200)
          {

          }
       }
       xmlhttp.open("POST", "insert.php");
       xmlhttp.send(formdata);
   }