以下范例将 XML 文档中的标记符直接映射成 HTML 标记符。在“映射数组”中不存在的元素将被忽略。当然,该范例将只对一个特定的 XML 文档有效。 
$file = "data.xml";
$map_array = array(
 "BOLD" => "B",
 "EMPHASIS" => "I",
 "LITERAL" => "TT"
);
function startElement($parser, $name, $attrs) {
 global $map_array;
 if ($htmltag == $map_array[$name]) {
 print "<$htmltag>";
 }
}
function endElement($parser, $name) {
 global $map_array;
 if ($htmltag == $map_array[$name]) {
 print "$htmltag>";
 }
}
function characterData($parser, $data) {
 print $data;
}
$xml_parser = xml_parser_create();
// 使用大小写折叠来保证我们能在元素数组中找到这些元素名称
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, true);
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "characterData");
if (!($fp = fopen($file, "r"))) {
 die("could not open XML input");
}
while ($data = fread($fp, 4096)) {
 if (!xml_parse($xml_parser, $data, feof($fp))) {
 die(sprintf("XML error: %s at line %d",
 xml_error_string(xml_get_error_code($xml_parser)),
 xml_get_current_line_number($xml_parser)));
 }
}
xml_parser_free($xml_parser);
?> 
		
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