wordpressでアップロードしたファイルはどこにありますか？

function custom_upload_directory( $uploads ) {
    $id = $_REQUEST['post_id'];
        $parent = get_post( $id )->post_parent;
 
    if( "post-type" == get_post_type( $id ) || "post-type" == get_post_type( $parent ) ) {
        $subdir = 'slides';
        $uploads['subdir'] = $subdir;
        $uploads['path'] = $uploads['basedir'].DIRECTORY_SEPARATOR.$subdir;
        $uploads['url'] = $uploads['baseurl'].'/'.$subdir;
    }
    return $uploads;
}
add_filter( 'upload_dir', 'custom_upload_directory' );

/**
 * Change Upload Directory for Custom Post-Type
 *
 * This will change the upload directory for a custom post-type. Attachments will
 * now be uploaded to an "uploads" directory within the folder of your plugin. Make
 * sure you swap out "post-type" in the if-statement with the appropriate value...
 */
function custom_upload_directory( $args ) {
  
    $id = $_REQUEST['post_id'];
    $parent = get_post( $id )->post_parent;
  
    // Check the post-type of the current post
    if( "post-type" == get_post_type( $id ) || "post-type" == get_post_type( $parent ) ) {
        $args['path'] = plugin_dir_path(__FILE__) . "uploads";
        $args['url']  = plugin_dir_url(__FILE__) . "uploads";
        $args['basedir'] = plugin_dir_path(__FILE__) . "uploads";
        $args['baseurl'] = plugin_dir_url(__FILE__) . "uploads";
    }
    return $args;
}
add_filter( 'upload_dir', 'custom_upload_directory' );

$args['path'] = plugin_dir_path(__FILE__) . "uploads" . $args['subdir'];
$args['url']  = plugin_dir_url(__FILE__) . "uploads" . $args['subdir'];

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' );

$upload_dir = wp_upload_dir();
$upload_dir now contains something like the following (if successful)
Array (
    [path] => C:\path\to\wordpress\wp-content\uploads\2010\05
    [url] => http://example.com/wp-content/uploads/2010/05
    [subdir] => /2010/05
    [basedir] => C:\path\to\wordpress\wp-content\uploads
    [baseurl] => http://example.com/wp-content/uploads
    [error] =>
)