用wp_editor在后台管理页面（比如用add_menu_page创建的页面）创建一个媒体上传功能，希望所有从该页面上传的文件都保存到wp-content/uploads/myfolder目录下。
由 于ajax上传是直接调用wp-admin/async_upload.php文件，只能通过post_id获取post信息，而后台管理页面并非 post，所以判断什么时候应该更改upload_dir有些麻烦。此时，可以用采用判断页面referer的方法,用wp_get_referer() 函数获取引荐url，如果正好与我们的option page url想等，就更该目录。
function custom_upload_directory( $uploads ) {
if( wp_get_referer() == 'http://domain.com/wp-admin/admin.php?page=myoptionpage'){
$subdir = 'myfolder';
$uploads['subdir'] = $subdir;
$uploads['path'] = $uploads['basedir'].DIRECTORY_SEPARATOR.$subdir;
$uploads['url'] = $uploads['baseurl'].'/'.$subdir;
}
return $uploads;
}
add_filter( 'upload_dir', 'custom_upload_directory' );
四、参考信息
filter:upload_dir是在wp_upload_dir()函数中调用的
$upload_dir = wp_upload_dir();
$upload_dir now contains something like the following (if successful)
Array (
[path] => C:pathtowordpresswp-contentuploads2010 5
[url] => http://example.com/wp-content/uploads/2010/05
[subdir] => /2010/05
[basedir] => C:pathtowordpresswp-contentuploads
[baseurl] => http://example.com/wp-content/uploads
[error] =>
)
