The function below is intended to return the size of the base directory. Although additional files have been uploaded, it continues to display the same size. What am I missing?

function get_space_used() {
    $upload_dir = wp_upload_dir();
    $space_used = number_format( get_dirsize( $upload_dir['basedir'] ) / ( 1024 * 1024 ), 1 );
    return $space_used;
}

The function below is intended to return the size of the base directory. Although additional files have been uploaded, it continues to display the same size. What am I missing?

function get_space_used() {
    $upload_dir = wp_upload_dir();
    $space_used = number_format( get_dirsize( $upload_dir['basedir'] ) / ( 1024 * 1024 ), 1 );
    return $space_used;
}

• uploads

• @kero you should post that as an answer – Tom J Nowell ♦ Commented Mar 15, 2022 at 10:54
• Just did it @TomJNowell – kero Commented Mar 15, 2022 at 11:02

1 Answer 1

Under the hood, get_dirsize() uses recurse_dirsize() which uses a transient called dirsize_cache. Try clearing that transient and check again.

To do so, you can use one of the following methods:

• call delete_transient('dirsize_cache');
• use WP CLI's wp transient delete
• use a plugin

Looking further through the source code, I think it should be possible to use recurse_dirsize() directly in your code and telling it not to cache like so:

$upload_dir = wp_upload_dir();
$size = recurse_dirsize($upload_dir['basedir'], null, null, []);

By passing an empty array [] as the fourth argument, it should circumvent the cache because the !isset($directory_cache) now returns a different result.