`wp_dirname()` to match `wp_basename()`

[Denis-de-Bernardy]

There's an i18n friendly wp_basename() function in core. Perhaps we should also add an i18n friendly version of dirname() to match it?

/**
 * i18n friendly version of dirname()
 *
 * @since 3.9.0
 *
 * @param string $path A path.
 * @return string
 */
function wp_dirname( $path ) {
	return urldecode( dirname( str_replace( array( '%2F', '%5C' ), '/', urlencode( $path ) ) ) );
}

References: #11887, #21217, #23267, etc.

https://core.trac.wordpress.org/search?q=wp_basename

[voldemortensen]

Added patch with i18n friendly version of dirname.

[SergeyBiryukov]

wp_dirname() might be handy if we display non-ASCII directory names somewhere, but apparently it doesn't have a particular use case in core right now.

Feel free to reopen if there's a use case.