CI_Utf8::safe_ascii_for_xml PHP Method

Removes all ASCII control characters except horizontal tabs, line feeds, and carriage returns, as all others can cause problems in XML.

public safe_ascii_for_xml ( string $str ) : string
$str	string	String to clean
return	string

    public function safe_ascii_for_xml($str)
    {
        return remove_invisible_characters($str, FALSE);
    }

CI_Utf8