这是@One Trick Pony的答案的扩展。除了将文件上传到适当位置外，这还将把所述文件另存为附件：
<?php
// include js
add_action('admin_enqueue_scripts', function($page){
// check if this your page here with the upload form!
if(($page !== 'post.php') || (get_post_type() !== 'post'))
return;
wp_enqueue_script('plupload-all');
});
// this adds a simple metabox with the upload form on the edit-post page
add_action('add_meta_boxes', function(){
add_meta_box('gallery_photos', __('Photos'), 'upload_meta_box', 'post', 'normal', 'high');
});
// so here's the actual uploader
// most of the code comes from media.php and handlers.js
function upload_meta_box(){ ?>
<div id="plupload-upload-ui" class="hide-if-no-js">
<div id="drag-drop-area">
<div class="drag-drop-inside">
<p class="drag-drop-info"><?php _e('Drop files here'); ?></p>
<p><?php _ex('or', 'Uploader: Drop files here - or - Select Files'); ?></p>
<p class="drag-drop-buttons"><input id="plupload-browse-button" type="button" value="<?php esc_attr_e('Select Files'); ?>" class="button" /></p>
</div>
</div>
</div>
<?php
$plupload_init = array(
'runtimes' => 'html5,silverlight,flash,html4',
'browse_button' => 'plupload-browse-button',
'container' => 'plupload-upload-ui',
'drop_element' => 'drag-drop-area',
'file_data_name' => 'async-upload',
'multiple_queues' => true,
'max_file_size' => wp_max_upload_size().'b',
'url' => admin_url('admin-ajax.php'),
'flash_swf_url' => includes_url('js/plupload/plupload.flash.swf'),
'silverlight_xap_url' => includes_url('js/plupload/plupload.silverlight.xap'),
'filters' => array(array('title' => __('Allowed Files'), 'extensions' => '*')),
'multipart' => true,
'urlstream_upload' => true,
// additional post data to send to our ajax hook
'multipart_params' => array(
'_ajax_nonce' => wp_create_nonce('photo-upload'),
'action' => 'photo_gallery_upload', // the ajax action name
),
);
// we should probably not apply this filter, plugins may expect wp's media uploader...
$plupload_init = apply_filters('plupload_init', $plupload_init); ?>
<script type="text/javascript">
jQuery(document).ready(function($){
// create the uploader and pass the config from above
var uploader = new plupload.Uploader(<?php echo json_encode($plupload_init); ?>);
// checks if browser supports drag and drop upload, makes some css adjustments if necessary
uploader.bind('Init', function(up){
var uploaddiv = $('#plupload-upload-ui');
if(up.features.dragdrop){
uploaddiv.addClass('drag-drop');
$('#drag-drop-area')
.bind('dragover.wp-uploader', function(){ uploaddiv.addClass('drag-over'); })
.bind('dragleave.wp-uploader, drop.wp-uploader', function(){ uploaddiv.removeClass('drag-over'); });
}else{
uploaddiv.removeClass('drag-drop');
$('#drag-drop-area').unbind('.wp-uploader');
}
});
uploader.init();
// a file was added in the queue
uploader.bind('FilesAdded', function(up, files){
var hundredmb = 100 * 1024 * 1024, max = parseInt(up.settings.max_file_size, 10);
plupload.each(files, function(file){
if (max > hundredmb && file.size > hundredmb && up.runtime != 'html5'){
// file size error?
}else{
// a file was added, you may want to update your DOM here...
console.log(file);
}
});
up.refresh();
up.start();
});
// a file was uploaded
uploader.bind('FileUploaded', function(up, file, response) {
// this is your ajax response, update the DOM with it or something...
console.log(response);
});
});
</script>
<?php
}
// handle uploaded file here
add_action('wp_ajax_photo_gallery_upload', function(){
check_ajax_referer('photo-upload');
// you can use WP's wp_handle_upload() function:
$file = $_FILES['async-upload'];
$status = wp_handle_upload($file, array('test_form'=>true, 'action' => 'photo_gallery_upload'));
// and output the results or something...
echo 'Uploaded to: '.$status['url'];
//Adds file as attachment to WordPress
echo "\n Attachment ID: " .wp_insert_attachment( array(
'post_mime_type' => $status['type'],
'post_title' => preg_replace('/\.[^.]+$/', '', basename($file['name'])),
'post_content' => '',
'post_status' => 'inherit'
), $status['file']);
exit;
});
?>