/**
* Strips whitespace (or other UTF-8 characters) from the beginning and
* end of a string. This is a UTF8-aware version of [trim](http://php.net/trim).
*
* $str = UTF8::wptrim($str);
*
* @author Andreas Gohr <*****@*****.**>
* @param string $str input string
* @param string $charlist string of characters to remove
* @return string
*/
public static function trim($str, $charlist = NULL)
{
if ($charlist === NULL) {
return trim($str);
}
return UTF8::wpltrim(UTF8::rtrim($str, $charlist), $charlist);
}
