如何使用Ajax发送变量?

时间:2013-08-22 23:10:06

标签: php jquery ajax

我正在尝试使用Ajax和&amp ;;上传文件PHP,但问题是我无法发送包含文件夹ID的输入类型文本。

这是我的HTML:

<form method="post" enctype="multipart/form-data"  action="uploadify.php">
        <input type="file" name="images" id="images" multiple />
        <input type="hidden" name="eid" value="<?php echo $eid;?>" />
        <input type="btn submit" id="btn" value="Upload" />
      </form>

    <div id="response"></div>
    <ul id="image-list">

    </ul>

这是我的JavaScript:

(function () {
    var input = document.getElementById("images"), 
        formdata = false;

    function showUploadedItem (source) {
        var list = document.getElementById("image-list"),
            li   = document.createElement("li"),
            img  = document.createElement("img");
        img.src = source;
        li.appendChild(img);
        list.appendChild(li);
    }   

    if (window.FormData) {
        formdata = new FormData();
        document.getElementById("btn").style.display = "none";
    }

    input.addEventListener("change", function (evt) {
        document.getElementById("response").innerHTML = "Uploading . . ."
        var i = 0, len = this.files.length, img, reader, file;

        for ( ; i < len; i++ ) {
            file = this.files[i];

            if (!!file.type.match(/image.*/)) {
                if ( window.FileReader ) {
                    reader = new FileReader();
                    reader.onloadend = function (e) { 
                        showUploadedItem(e.target.result, file.fileName);
                    };
                    reader.readAsDataURL(file);
                }
                if (formdata) {
                    formdata.append("images[]", file);
                }
            }   
        }

        if (formdata) {
            $.ajax({
                url: "uploadify.php",
                type: "POST",
                data: formdata,
                processData: false,
                contentType: false,
                success: function (res) {
                    document.getElementById("response").innerHTML = res; 
                }
            });
        }
    }, false);
}());

这是我的PHP:

<?php
//upload.php
$eid = $_POST['eid'];
$output_dir = "./images/icons/".$eid."/screenshots/";
if (!file_exists($output_dir) and !is_dir($output_dir)) {
    mkdir($output_dir);  
}


foreach ($_FILES["images"]["error"] as $key => $error) {
    if ($error == UPLOAD_ERR_OK) {
        $name = $_FILES["images"]["name"][$key];
        move_uploaded_file( $_FILES["images"]["tmp_name"][$key], "$output_dir" . $_FILES['images']['name'][$key]);
    }
}


echo "<h2>Successfully Uploaded Images $eid</h2>";

我想要做的是我发送输入类型隐藏名称= eid但不知道什么是错的,为什么我无法通过我的JS函数发送它?

2 个答案:

答案 0 :(得分:0)

"The only thing missing is that i am unable to send that eid field . [...] If i will be able to post that field with this function my gallery will be completed"

为输入字段指定一个id,从表单中获取id,因此您可以获取与id对应的值:

<input id='theEIdGuy' type="hidden" name="eid" value="<?php echo $eid;?>" />

因此,如果我们有PHP(在表单提交之后)我们可以像这样检索它,现在这是可能的,因为它期望通过标识符(id)来识别值,而不是名称。

$eid = isset($_POST['theEIdGuy']) ? $_POST['theEIdGuy'] : "It's not set :(";

使用ternary operator

使用原始javascript你可以这样得到它(但如果你只需要用PHP,你就不必这样做了):

var theEIdGuy = document.getElementById('theEIdGuy').value;

使用jQuery你可以这样:

var theEIDGuy = $('#theEIdGuy').val();

答案 1 :(得分:0)

这些天我遇到了同样的问题......解决方案更简单,你可以想象:)

改变这个:

 if (formdata) {
                    formdata.append("images[]", file);
                }

使用:

 if (formdata) {
var variable_eid = document.getElementById("eid");
                    formdata.append("images[]", file);
                    formdata.append("eid", variable_eid);
                }

对我来说使用Jquery / Ajax更简单..编码和清理更少。我试着快速调整它以满足你的需求......

 $(document).ready(function() {
$('#images').change(function(){
var variable_eid = $('#eid').val();
var data;
data = new FormData();
data.append( 'images', $('#file')[0].files[0] );
data.append( 'eid', variable_eid);
 $.ajax({
        url: 'uploadify.php',
        data:data,
       processData: false,
       contentType: false,
        type: 'POST',
        success: function ( data ) {
           $('#response').html(data);
        }
        });
    });
        });