ac/column/value add_filter

/**

 * @param $value  string

 * @param $id     int

 * @param $column AC_Column

 */

function acp_column_value_file_size( $value, $id, $column ) {
	if ( 'column-file_size' === $column->get_type() ) {

		$file = wp_get_attachment_url( $id );
		// Change $abs to get the correct absolute path of the file

		$abs = str_replace( WP_CONTENT_URL, WP_CONTENT_DIR, $file );
		if ( file_exists( $abs ) ) {

			$value = ac_helper()->file->get_readable_filesize( filesize( $abs ) );

		}

	}
	return $value;

}
add_filter( 'ac/column/value', 'acp_column_value_file_size', 10, 3 );