/**
* transcode to ISO 8859
*
* To be used only when there is no other alternative.
*
* @link http://www.unicode.org/Public/MAPPINGS/ISO8859/8859-15.TXT ISO/IEC 8859-15:1999 to Unicode
*
* @param string a complex string using unicode entities
* @param string optional characters to accept
* @return a ISO 8859 string
*
* @see feeds/flash/slashdot.php
*/
public static function &to_iso8859($utf, $options = '')
{
// iso-8859-15 + Microsoft extensions cp1252
list($iso_entities, $unicode_entities) = Utf8::get_iso8859();
// transcode Unicode entities to iso 8859
$text = str_replace($unicode_entities, $iso_entities, $utf);
// translate only 1-byte entities
$areas = preg_split('/&#(\\d+);/', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$text = '';
$index = 0;
foreach ($areas as $area) {
switch ($index % 2) {
case 0:
// before entity
$text .= $area;
break;
case 1:
// the entity itself
// get the integer value
$unicode = intval($area);
// one ASCII byte
if ($unicode < 0xff) {
$text .= chr($unicode);
} else {
$text .= '_';
}
break;
}
$index++;
}
// done
return $text;
}
