/**
* Convert non-UTF8 strings to UTF8. Strings already in UTF8 will be
* returned intact.
*
* @param string $str
* @return string
*/
public static function convert_to_utf8($str)
{
if (Encoding::is_ascii($str)) {
// valid! nothing to do
} elseif (Encoding::is_utf8($str)) {
// valid! nothing to do
} elseif (Encoding::is_cp1252($str)) {
$str = utf8_encode($str);
$str = Encoding::fix_cp1252_codepoints_in_utf8($str);
} elseif (Encoding::is_latin1($str)) {
$str = utf8_encode($str);
}
return $str;
}
