有没有人用过这个？ （JQuery上传）

Question

我一直在尝试在http://tuts.wtfdiary.com/2012/06/file-upload-in-php-without-refreshing.html上使用本教程，并且我没有将它运用到我自己的站点中。我甚至一字不提地复制了脚本，并且仍然没有任何内容 - 有没有任何理由说明这可能无效？我甚至将.live更改为.on并更改了JQuery版本。我想知道是否与提交有关？谢谢

这里是代码我使用：

<div id="formArea" class="userProfileFormWidth"> 
         <script type="text/javascript" > 
         $(document).ready(function() { 
         $('#photoimg').live('change', function() 
         { 
         $("#preview").html(''); 
         $("#current").hide(); 
         $("#preview").html('<img src="ajax-loader.gif" alt="Uploading file...."/>'); 
         $("#imageform").ajaxForm({ 
         target: '#preview' 
         }).submit(); 
         }); 
         }); 
         </script> 
         <form id="imageform" method="post" enctype="multipart/form-data" action='update-user-profile.php'> 

         Upload image from your computer: <input type="file" name="photoimg" id="photoimg" /><br><br/> 

         </form> 
         <div id='preview'></div> 
        </div> 

更新用户profile.php

<?php 
session_start(); 
include("php/db-connect.php"); 

$get_user_sql = "SELECT * FROM members WHERE username = '$user_username'"; 
$get_user_res = mysqli_query($con, $get_user_sql); 
while($user = mysqli_fetch_array($get_user_res)){ 
    $user_id = $user['id']; 
} 
$path = "uploads/"; 
$valid_formats = array("jpg", "png", "gif"); 
if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST") 
{ 
$name = $_FILES['photoimg']['name']; 
$size = $_FILES['photoimg']['size']; 
if(strlen($name)) 
{ 
list($txt, $ext) = explode(".", $name); 
if(in_array($ext,$valid_formats)) 
{ 
if($size<(1024*1024)) 
{ 
$actual_image_name = time().substr(str_replace(" ", "_", $txt), 5).".".$ext; 
$tmp = $_FILES['photoimg']['tmp_name']; 
if(move_uploaded_file($tmp, $path.$actual_image_name)) 
{ 
$upload_avatar_sql = "UPDATE profile_members SET avatar='$actual_image_name' WHERE id='$user_id'"; 
$upload_avatar_res = mysqli_query($con, $upload_avatar_sql)or die(mysqli_error()); 
echo "<img src='uploads/".$actual_image_name."' class='preview'>"; 
} 
else 
echo "failed"; 
} 
else 
echo "Image file size max 1024k"; 
} 
else 
echo "Invalid file format.."; 
} 
else 
echo "No file selected"; 
exit; 
} 

?> 

Answer 1

有任何错误消息？尝试查看/调试您的代码，只需按f12，然后在控制台中单击以查看发生了什么问题