Filters the result when generating a unique file name.

$filename string

Unique file name.

$ext string

File extension. Example: ".png".

$dir string

Directory path.

$unique_filename_callback callable|null

Callback function that generates the unique file name.

$alt_filenames string[]

Array of alternate file names that were checked for collisions.

$number int|string

The highest number that was used to make the file name unique or an empty string if unused.

File: wp-includes/functions.php. View all references

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