Wordpress上传仅限于登录用户

Im使用Github的Gist限制登录用户访问WP Content/Uploads文件夹中的图像。现在，该脚本适用于需要登录的部分，但登录时返回的图像无效。 当我检查返回的图像时，我看到了一个文件大小，很好的内容头。但它仍然是一个损坏的文件

https://gist.github.com/hakre/1552239

使用最新的WP版本

有人知道我应该去哪里看这个剧本吗

<?php
/*
 * dl-file.php
 *
 * Protect uploaded files with login.
 * 
 * @link http://wordpress.stackexchange.com/questions/37144/protect-        wordpress-uploads-if-user-is-not-logged-in
 * 
 * @author hakre <http://hakre.wordpress.com/>
 * @license GPL-3.0+
 * @registry SPDX
 */
ob_start();
require_once('wp-load.php');
require_once ABSPATH . WPINC . '/formatting.php';
require_once ABSPATH . WPINC . '/capabilities.php';
require_once ABSPATH . WPINC . '/user.php';
require_once ABSPATH . WPINC . '/meta.php';
require_once ABSPATH . WPINC . '/post.php';
require_once ABSPATH . WPINC . '/pluggable.php';
wp_cookie_constants();
ob_end_clean();
ob_end_flush();

is_user_logged_in() ||  auth_redirect();

list($basedir) = array_values(array_intersect_key(wp_upload_dir(),                 array('basedir' => 1)))+array(NULL);

$file =  rtrim($basedir,'/').'/'.str_replace('..', '', isset($_GET[ 'file'     ])? ''.$_GET[ 'file' ]:'');

if (!$basedir || !is_file($file)) {
status_header(404);
wp_redirect(home_url());
exit();
}

$mime = wp_check_filetype($file);
if( false === $mime[ 'type' ] && function_exists( 'mime_content_type' ) )
$mime[ 'type' ] = mime_content_type( $file );

if( $mime[ 'type' ] )
$mimetype = $mime[ 'type' ];
else
$mimetype = 'image/' . substr( $file, strrpos( $file, '.' ) + 1 );

header( 'Content-Type: ' . $mimetype ); // always send this
if ( false === strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) )
header( 'Content-Length: ' . filesize( $file ) );

$last_modified = gmdate( 'D, d M Y H:i:s', filemtime( $file ) );
$etag = '"' . md5( $last_modified ) . '"';
header( "Last-Modified: $last_modified GMT" );
header( 'ETag: ' . $etag );
header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + 100000000 ) . ' GMT' );

// Support for Conditional GET
$client_etag = isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ? stripslashes(         $_SERVER['HTTP_IF_NONE_MATCH'] ) : false;

if( ! isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) )
$_SERVER['HTTP_IF_MODIFIED_SINCE'] = false;

$client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
// If string is empty, return 0. If not, attempt to parse into a timestamp
$client_modified_timestamp = $client_last_modified ? strtotime(     $client_last_modified ) : 0;

// Make a timestamp for our most recent modification...
$modified_timestamp = strtotime($last_modified);

if ( ( $client_last_modified && $client_etag )
? ( ( $client_modified_timestamp >= $modified_timestamp) && ( $client_etag == $etag ) )
: ( ( $client_modified_timestamp >= $modified_timestamp) || ( $client_etag == $etag ) )
) {
status_header( 304 );
exit;
}

 // If we made it this far, just serve the file
 readfile( $file );

---

通过修改ReadFile以仅返回文件的干净输出来修复：

while (ob_get_level()) {
ob_end_clean();
}
readfile($file);
exit();

检查脚本返回的实际“图像数据”——它可能包含更多信息——PHP错误消息、其他意外输出……感谢良好的反馈。修好了。