wp_unique_filename filter-hook . WP 4.5.0

Filters the result when generating a unique file name.

Usage

add_filter( 'wp_unique_filename', 'filter_function_name_584', 10, 4 );
function filter_function_name_584( $filename, $ext, $dir, $unique_filename_callback ){
	// filter...

	return $filename;
}

$filename(string)

Unique file name.

$ext(string)

File extension, eg. ".png".

$dir(string)

Directory path.

$unique_filename_callback(callable/null)

Callback function that generates the unique file name.

Where the hook is called

return apply_filters( 'wp_unique_filename', $filename2, $ext, $dir, $unique_filename_callback );

return apply_filters( 'wp_unique_filename', $filename, $ext, $dir, $unique_filename_callback );

Where the hook is used (in WP core)