WordPress at a glance
filter is not described

pre_wp_unique_filename_file_list filter-hook . WP 5.5.0

Filters the file list used for calculating a unique filename for a newly added file.

Returning an array from the filter will effectively short-circuit retrieval from the filesystem and return the passed value instead.

Usage

add_filter( 'pre_wp_unique_filename_file_list', 'filter_function_name_4059', 10, 3 );
function filter_function_name_4059( $files, $dir, $filename ){
	// filter...

	return $files;
}
$files(array/null)
The list of files to use for filename comparisons.
Default: null (to retrieve the list from the filesystem)
$dir(string)
The directory for the new file.
$filename(string)
The proposed filename for the new file.

Changelog

Since 5.5.0 Introduced.

Where the hook is called

wp_unique_filename()
pre_wp_unique_filename_file_list
wp-includes/functions.php 2559
$files = apply_filters( 'pre_wp_unique_filename_file_list', null, $dir, $filename );

Where in WP core the hook is used WordPress

Usage not found.