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我的ajax文件有问题。ajax 文件不适用于 php 表单。当我运行代码时，它显示错误 file_get_content 错误，文件名为空。

php代码工作正常。但是ajax文件不能传输文件字段值。因此该文件无法随邮件附加。

它显示错误：文件名为空

请帮助我通过 ajax 文件传递​​文件字段值。

<div>
<form  method="post" enctype="multipart/form-data" name="form1" id="form1"     action="contactus.php" onsubmit="xmlhttpPost('contactus.php', 'form1', 'Myresult', ''); return false;">
Name:<input name="name1" type="text"   value="" />
Address:<input name="address1" type="text"  value="" /> 
Phone:<input name="phone1" type="text" value=""/>
Email: <input name="email1" type="text" value="" />
File:<input name="file" type="file" size="35" id="file" />
Links:<input name="links1" type="text" value="" />
Subject:<input name="subject1" type="text" value="" />
Location:<select name="location">
              <option value="" selected="selected">--Select--</option>
              <option>1</option>
              <option>2</option>
              <option>3</option>
              <option>4</option>
              <option>5</option>
            </select>

Comments:<textarea name="comment1"  ></textarea>
<input name="submit" id="submit" type="submit"/>   
<div id="Myresult"></div>
</form>
</div>

php 表单（contactus.php）

<?php
if(isset($_POST['submit']))
{

 $name=$_POST['name1'];
$address=$_POST['address1'];
$phone=$_POST['phone1'];
$email=$_POST['email1'];
$subject=$_POST['subject1'];
$location=$_POST['location'];
$comment=$_POST['comment1'];
$links=$_POST['links1'];

$to='mail@mail.com';

 $message .= "\nName: ".$name."\n\n";
 $message .= "Address: ".$address."\n\n";
 $message .= "Phone: ".$phone."\n\n";
 $message .= "Email: ".$email."\n\n";
  $message .= "Links: ".$links."\n\n";
  $message .= "Location: ".$location."\n\n";
  $message .= "Comments:\n\n ".$comment."\n";



$attachment = chunk_split(base64_encode(file_get_contents($_FILES['file']['tmp_name'])));
    $filename = $_FILES['file']['name'];
    $filetype = $_FILES['file']['type'];        
    $boundary =md5(date('r', time())); 

$headers = "From: $name <$email>\r\nReply-To: $name <$email>";
$headers .= "\r\nMIME-Version: 1.0\r\nContent-Type: multipart/mixed; boundary=\"_1_$boundary\"";


$message="This is a multi-part message in MIME format.

  --_1_$boundary
 Content-Type: multipart/alternative; boundary=\"_2_$boundary\"

 --_2_$boundary
 Content-Type: text/plain; charset=\"iso-8859-1\"
 Content-Transfer-Encoding: 7bit

 $message

 --_2_$boundary--
 --_1_$boundary
 Content-Type: $filetype; name=\"$filename\" 
 Content-Transfer-Encoding: base64 
 Content-Disposition: attachment 

 $attachment

 --_1_$boundary--";

 mail($to,$subject,$message,$headers);

 print 'Thanks, your message sent!';

 }

 ?>

ajax.js

function xmlhttpPost(strURL,formname,responsediv,responsemsg) {

var xmlHttpReq = false;

var self = this;

// Xhr per Mozilla/Safari/Ie7

if (window.XMLHttpRequest) {

    self.xmlHttpReq = new XMLHttpRequest();

}

// per tutte le altre versioni di IE

else if (window.ActiveXObject) {

    self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");

}

self.xmlHttpReq.open('POST', strURL, true);

self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

self.xmlHttpReq.onreadystatechange = function() {

    if (self.xmlHttpReq.readyState == 4) {

        // Quando pronta, visualizzo la risposta del form

        updatepage(self.xmlHttpReq.responseText,responsediv);

    }

    else{

        // In attesa della risposta del form visualizzo il msg di attesa

        updatepage(responsemsg,responsediv);



    }

}

  self.xmlHttpReq.send(getquerystring(formname));

}



 function getquerystring(formname) {

 var form = document.forms[formname];

var qstr = "";



function GetElemValue(name, value) {

    qstr += (qstr.length > 0 ? "&" : "")

        + escape(name).replace(/\+/g, "%2B") + "="

        + escape(value ? value : "").replace(/\+/g, "%2B");

        //+ escape(value ? value : "").replace(/\n/g, "%0D");

}



var elemArray = form.elements;

for (var i = 0; i < elemArray.length; i++) {

    var element = elemArray[i];

    var elemType = element.type.toUpperCase();

    var elemName = element.name;

    if (elemName) {

        if (elemType == "TEXT"

                || elemType == "TEXTAREA"

                || elemType == "PASSWORD"

                || elemType == "BUTTON"

                || elemType == "RESET"

                || elemType == "SUBMIT"

                || elemType == "FILE"

                || elemType == "IMAGE"

                || elemType == "HIDDEN")

            GetElemValue(elemName, element.value);

        else if (elemType == "CHECKBOX" && element.checked)

            GetElemValue(elemName, 

                element.value ? element.value : "On");

        else if (elemType == "RADIO" && element.checked)

            GetElemValue(elemName, element.value);

        else if (elemType.indexOf("SELECT") != -1)

            for (var j = 0; j < element.options.length; j++) {

                var option = element.options[j];

                if (option.selected)

                    GetElemValue(elemName,

                        option.value ? option.value : option.text);

            }

    }

}

return qstr;

}

function updatepage(str,responsediv){


document.getElementById(responsediv).innerHTML = str;


}
4

1 回答 1

1

问题：

1) 标准 AJAX 无法上传文件。通常的解决方法是在隐藏中构建一个表单<iframe>并在那里执行标准的 POST 上传。

2）您的代码只是假设上传已执行并成功。坦率地说，这是愚蠢的。与用户打交道时永远不要假设成功。永远做好最坏的打算。您的代码至少应具有以下内容：

if ($_FILES['fieldname']['error'] !== UPLOAD_ERR_OK) {
   die("File upload failed with error code " . $_FILES['fieldname']['error']);
}

如果你有类似的东西，你会得到（可能）错误代码#4 - 没有上传文件，因为上传不能通过 AJAX 完成。错误代码在这里定义：http ://www.php.net/manual/en/features.file-upload.errors.php

3) 您正在构建自己的 mime 电子邮件，这不是最容易做到的事情。为什么不尝试使用 Swiftmailer 或 PHPMailer？两者都可以发送带有 html、嵌入式附件等的 MIME 电子邮件......几乎是微不足道的。在任一库中，几乎所有构建 MIME 的代码都将简化为单行。

于 2013-05-22T18:54:37.150 回答