post_type )
		wp_die( __( 'Invalid post type.' ) );
	if ( ! current_user_can( 'edit_post', $id ) )
		wp_die( __( 'Sorry, you are not allowed to edit this item.' ) );
	switch ( $_REQUEST['fetch'] ) {
		case 3 :
			if ( $thumb_url = wp_get_attachment_image_src( $id, 'thumbnail', true ) )
				echo ' . ') ';
			echo '' . _x( 'Edit', 'media item' ) . '';
			// Title shouldn't ever be empty, but use filename just in case.
			$file = get_attached_file( $post->ID );
			$title = $post->post_title ? $post->post_title : wp_basename( $file );
			echo '
';
			echo '' . _x( 'Edit', 'media item' ) . '';
			// Title shouldn't ever be empty, but use filename just in case.
			$file = get_attached_file( $post->ID );
			$title = $post->post_title ? $post->post_title : wp_basename( $file );
			echo '
' . esc_html( wp_html_excerpt( $title, 60, '…' ) ) . '
';
			break;
		case 2 :
			add_filter('attachment_fields_to_edit', 'media_single_attachment_fields_to_edit', 10, 2);
			echo get_media_item($id, array( 'send' => false, 'delete' => true ));
			break;
		default:
			add_filter('attachment_fields_to_edit', 'media_post_single_attachment_fields_to_edit', 10, 2);
			echo get_media_item($id);
			break;
	}
	exit;
}
check_admin_referer('media-form');
$post_id = 0;
if ( isset( $_REQUEST['post_id'] ) ) {
	$post_id = absint( $_REQUEST['post_id'] );
	if ( ! get_post( $post_id ) || ! current_user_can( 'edit_post', $post_id ) )
		$post_id = 0;
}
$id = media_handle_upload( 'async-upload', $post_id );
if ( is_wp_error($id) ) {
	echo '
	' . __('Dismiss') . '
	' . sprintf(__('“%s” has failed to upload.'), esc_html($_FILES['async-upload']['name']) ) . '' .
	esc_html($id->get_error_message()) . '
 ';
	exit;
}
if ( $_REQUEST['short'] ) {
	// Short form response - attachment ID only.
	echo $id;
} else {
	// Long form response - big chunk o html.
	$type = $_REQUEST['type'];
	/**
	 * Filters the returned ID of an uploaded attachment.
	 *
	 * The dynamic portion of the hook name, `$type`, refers to the attachment type,
	 * such as 'image', 'audio', 'video', 'file', etc.
	 *
	 * @since 2.5.0
	 *
	 * @param int $id Uploaded attachment ID.
	 */
	echo apply_filters( "async_upload_{$type}", $id );
}