我正在构建一个插件，我需要上传图像并将其保存到默认wp media文件夹中的单独文件夹和自定义数据库表中。

我设法做到了这两件事，但对于每一张上传的图片，我都会得到一个404 error on the console 我觉得我的方式不好。

代码如下：

<?php ?>

<script>
(function ( $ ) {

$(document).ready(function () {
    var i = <?php echo $chapter->id; ?>;
    var path = \'<?php echo MT_DIR_PATH . sanitize_title(get_the_title()) . \'_\' . $post->ID . \'/ch_\' . $chapter->chapter_number; ?>\';
    var plugin_dir = \'<?php echo MT_URL ?>\';
    var manga_id  = $(\'#the-post-id\').val();

    function upload(i){
        var uploader = new plupload.Uploader({
            runtimes : \'html5,html4\',
            browse_button : \'add-images-\'+i, // you can pass in id...
            container: document.getElementById(\'container\'), // ... or DOM Element itself
            url : plugin_dir + \'do.php\',
            filters : {
                max_file_size : \'10mb\',
                mime_types: [
                    {title : \'Image files\', extensions : \'jpg,gif,png\'}
                ]
            },
            multipart_params : {
                "chapter_id": i,
                "path": path
            },
            init: {
                PostInit: function() {
                    document.getElementById(\'filelist-\'+i).innerHTML = \'\';
                    document.getElementById(\'start-upload-\'+i).onclick = function() {
                        uploader.start();
                        return false;
                    };
                },

                FilesAdded: function(up, files) {
                    plupload.each(files, function(file) {
                        document.getElementById(\'filelist-\'+i).innerHTML += \'<div id="\' + file.id + \'">\' + file.name + \' (\' + plupload.formatSize(file.size) + \') <b></b></div>\';
                    });
                },

                UploadProgress: function(up, file) {
                    document.getElementById(file.id).getElementsByTagName(\'b\')[0].innerHTML = \'<span>\' + file.percent + "%</span>";
                }
            }
        });

        uploader.init();
    }
    upload(i);

<?php
$filename = $_FILES["file"]["name"];
$special_chars = array("?", "[", "]", "/", "\\\\", "=", "<", ">", ":", ";", ",", "\'", "\\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}");
$filename = str_replace($special_chars, \'\', $filename);
$filename = preg_replace(\'/[\\s-]+/\', \'-\', $filename);
$filename = trim($filename, \'.-_\');
$target_dir = $_POST[\'path\'];
require_once("includes/PluploadHandler.php");
require( \'../../../wp-blog-header.php\' );

PluploadHandler::no_cache_headers();
PluploadHandler::cors_headers();
if (!PluploadHandler::handle(array(
    \'target_dir\' => $target_dir,
    \'allow_extensions\' => \'jpg,jpeg,png\'
))) {
    die(json_encode(array(
        \'OK\' => 0,
        \'error\' => array(
            \'code\' => PluploadHandler::get_error_code(),
            \'message\' => PluploadHandler::get_error_message()
        )
    )));
}

    global $wpdb;
    $wpdb->insert( $wpdb->prefix . \'mt_images\', array(\'image_name\' => $filename, \'chapter_id\' => $_POST[\'chapter_id\']));
    die(json_encode(array(\'OK\' => 1)));

我的方法错了吗？