WordPress at a glance
filter is not described

parent_theme_file_uri filter-hook . WP 4.7.0

Filters the URL to a file in the parent theme.

Usage

add_filter( 'parent_theme_file_uri', 'filter_function_name_9755', 10, 2 );
function filter_function_name_9755( $url, $file ){
	// filter...

	return $url;
}
$url(string)
The file URL.
$file(string)
The requested file to search for.

Where the hook is called

get_parent_theme_file_uri()
wp-includes/link-template.php 4044
return apply_filters( 'parent_theme_file_uri', $url, $file );

Where the hook is used (in WP core)

Does not used.