Description:
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When you want to display phrases or words with special characters in ISO format by XML, the special characters are not displayed correctly.

Reproduce code:
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<?
error_reporting(E_ALL & ~E_NOTICE);

$xml = '<?xml version="1.0" encoding="ISO-8859-1"?><x>Test with some special characters: ? ? ? ? ?</x>';

$p = xml_parser_create();
xml_parser_set_option($p, XML_OPTION_CASE_FOLDING, 0);
xml_set_element_handler($p, 'start_elem', 'end_elem');
xml_set_character_data_handler($p, 'cdata');
xml_parse($p, $xml, true);
xml_parser_free($p);

function start_elem($parser, $tagname, $attributes){}

function end_elem($parser, $tagname){}

function cdata($parser, $data){ echo $data; }
?>

Expected result:
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Test with some special characters: ? ? ? ? ?

Actual result:
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Test with some special characters: é è ù ô ?