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PHP高亮显示XML源代码

它将阐明若何外部实体指向处置惩罚器来包孕和解析其它文档,若何处置惩罚 PIs,以及一种确定包孕有 PIs 的代码的可托度。

能被该典型应用的的 XML 文档(xmltest.xml 和 xmltest2.xml)被列在该典型之后。

外部实体典型

$name";

if (sizeof($attribs)) {

while (list($k, $v) = each($attribs)) {

print " $k="$v"";

}

}

print ">";

}

function endElement($parser, $name) {

print "</$name>";

}

function characterData($parser, $data) {

print "$data";

}

function PIHandler($parser, $target, $data) {

switch (strtolower($target)) {

case "php":

global $parser_file;

// If the parsed document is "trusted", we say it is safe

// to execute PHP code inside it. If not, display the code

// instead.

if (trustedFile($parser_file[$parser])) {

eval($data);

} else {

printf("Untrusted PHP code: %s",

htmlspecialchars($data));

}

break;

}

}

function defaultHandler($parser, $data) {

if (substr($data, 0, 1) == "&" && substr($data, -1, 1) == ";") {

printf('%s',

htmlspecialchars($data));

} else {

printf('%s',

htmlspecialchars($data));

}

}

function externalEntityRefHandler($parser, $openEntityNames, $base, $systemId,

$publicId) {

if ($systemId) {

if (!list($parser, $fp) = new_xml_parser($systemId)) {

printf("Could not open entity %s at %s

", $openEntityNames,

$systemId);

return false;

}

while ($data = fread($fp, 4096)) {

if (!xml_parse($parser, $data, feof($fp))) {

printf("XML error: %s at line %d while parsing entity %s

",

xml_error_string(xml_get_error_code($parser)),

xml_get_current_line_number($parser), $openEntityNames);

xml_parser_free($parser);

return false;

}

}

xml_parser_free($parser);

return true;

}

return false;

}

function new_xml_parser($file) {

global $parser_file;

$xml_parser = xml_parser_create();

xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 1);

xml_set_element_handler($xml_parser, "startElement", "endElement");

xml_set_character_data_handler($xml_parser, "characterData");

xml_set_processing_instruction_handler($xml_parser, "PIHandler");

xml_set_default_handler($xml_parser, "defaultHandler");

xml_set_external_entity_ref_handler($xml_parser, "externalEntityRefHandler");

if (!($fp = @fopen($file, "r"))) {

return false;

}

if (!is_array($parser_file)) {

settype($parser_file, "array");

}

$parser_file[$xml_parser] = $file;

return array($xml_parser, $fp);

}

if (!(list($xml_parser, $fp) = new_xml_parser($file))) {

die("could not open XML input");

}

print "

";

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)));

}

}

print "";

print "parse complete

";

xml_parser_free($xml_parser);

?>

xmltest.xml

]>

Title &plainEntity;

a1b1c1

a2c2

a3b3c3

&systemEntity;

About this Document

以下文档将被 xmltest.xml 文件调用: xmltest2.xml

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