/**
* Convert a phrase to a URL-safe title.
*
* @param string phrase to convert
* @param string word separator (- or _)
* @return string
*/
public static function title($title, $separator = '-')
{
$separator = $separator === '-' ? '-' : '_';
// Replace accented characters by their unaccented equivalents
$title = utf8::transliterate_to_ascii($title);
// Remove all characters that are not the separator, a-z, 0-9, or whitespace
$title = preg_replace('/[^' . $separator . 'a-z0-9\\s]+/', '', strtolower($title));
// Replace all separator characters and whitespace by a single separator
$title = preg_replace('/[' . $separator . '\\s]+/', $separator, $title);
// Trim separators from the beginning and end
return trim($title, $separator);
}
