jquery - 上传表单数据: Why jquery won't send parameters via post?

Question

这是我的代码:

$('#file_upload').uploadify({
        'swf'      : 'uploadify.swf',
        'uploader' : 'uploadify.php',
        'onSelect' : function(file) {
            $('#start').removeClass('hidden');
        },
        'method'   : 'post',
        'formData' : {
            'to': $('input#to').val(),
            'from': $('input#from').val(),
            'subject': $('input#subject').val()
        },
        'onQueueComplete' : function(queueData) {
            window.location.replace("index.php?success=uploaded");
        },
        'onUploadSuccess' : function(file, data, response) {
            alert('The file ' + file.name + ' was successfully uploaded with a response of ' + response + ':' + data);
        }
        // Your options here
    });

如您所见，我通过 POST 方法发送三个参数 TO、FROM、SUBJECT。

有服务器脚本

if (!empty($_FILES)) {
$tempFile = $_FILES['Filedata']['tmp_name'];
$targetPath = $_SERVER['DOCUMENT_ROOT'] . $targetFolder;
$targetFile = rtrim($targetPath,'/') . '/' . $_FILES['Filedata']['name'];

// Validate the file type
$fileTypes = array('jpg','jpeg','gif','png'); // File extensions
$fileParts = pathinfo($_FILES['Filedata']['name']);

if (move_uploaded_file($tempFile, $targetFile)) {

    echo $_REQUEST['subject'];
} else {
    echo "Something wrong";
}
}

并回显 $_REQUEST['subject'];什么也不返回我的错误在哪里？

如果我将 'subject': $('input#subject').val() 更改为 'subject': 'test subject' ，它就可以工作。但我需要从输入发送一个值。我该怎么做？

非常感谢

Answer 1

您在首次实例化 Uploadify 时设置 formData，而不是在提交上传时设置。如果您这样做，您将在加载页面时将 formData 设置为这些字段的值。

相反，使用 onUploadStart 选项在文件上传之前设置 formData...

$('#file_upload').uploadify({
    'swf'      : 'uploadify.swf',
    'uploader' : 'uploadify.php',
    'onSelect' : function(file) {
        $('#start').removeClass('hidden');
    },
    'method'   : 'post',
    'onQueueComplete' : function(queueData) {
        window.location.replace("index.php?success=uploaded");
    },
    'onUploadStart' : function(file) {
        $('#file_upload').uploadify('settings','formData',{
            'to': $('input#to').val(),
            'from': $('input#from').val(),
            'subject': $('input#subject').val()
        });
    }
    'onUploadSuccess' : function(file, data, response) {
        alert('The file ' + file.name + ' was successfully uploaded with a response of ' + response + ':' + data);
    }
    // Your options here
});