/**
* Encode string
*
* @param string str
* @param string charset defaults to XP default encoding
* @return string
*/
public static function encode($str, $charset = xp::ENCODING)
{
$r = array(' ' => '_');
foreach (QuotedPrintable::getCharsToEncode() as $i) {
$r[chr($i)] = '=' . strtoupper(dechex($i));
}
return sprintf('=?%s?Q?%s?=', $charset, strtr($str, $r));
}
/**
* Check if a string needs to be encoded and encode it if necessary
*
* @param string str
* @return string
*/
protected function _qstr($str)
{
static $q;
if (!isset($q)) {
$q = QuotedPrintable::getCharsToEncode();
}
$n = FALSE;
for ($i = 0, $s = strlen($str); $i < $s; $i++) {
if (!in_array(ord($str[$i]), $q)) {
continue;
}
$n = TRUE;
break;
}
return $n ? QuotedPrintable::encode($str, $this->getCharset()) : $str;
}
