WordPress sanitize Filename

functions.php

/**
 * Arquivos acentuados no upload do WordPress
 * @url https://wordpress.org/support/topic/uploaded-image-with-accents-in-name-image-dont-show-in-safari-6
 */
function sanitize_filename_on_upload($filename) {
	$param = explode('.', $filename);
	$ext = end($param);
	// Replace all weird characters
	$sanitized = preg_replace('/[^a-zA-Z0-9-_.]/', '', substr($filename, 0, -(strlen($ext)+1)));
	// Replace dots inside filename
	$sanitized = str_replace('.', '-', $sanitized);
	return strtolower($sanitized.'.'.$ext);
}
add_filter('sanitize_file_name', 'sanitize_filename_on_upload', 10);