Exemplos
The following example will echo back an xml file using the basic event based parser. Currently, (at least in the version of PHP5 I'm using) it will skip The XML declaration and the Doctype declaration--they don't seem to be captured by the default handler.
<?php
echo "<pre>";
$file = "test.xml";
echo $file."\n";
global $inTag;
$inTag = "";
$xml_parser = xml_parser_create();
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($xml_parser, XML_OPTION_SKIP_WHITE, 1);
xml_set_processing_instruction_handler($xml_parser, "pi_handler");
xml_set_default_handler($xml_parser, "parseDEFAULT");
xml_set_element_handler($xml_parser, "startElement", "endElement");
xml_set_character_data_handler($xml_parser, "contents");
if (!($fp = fopen($file, "r"))) {
if (!xml_parse($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)));
}
}
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($xml_parser);
function startElement($parser, $name, $attrs) {
global $inTag;
global $depth;
$padTag = str_repeat(str_pad(" ", 3), $depth);
if (!($inTag == "")) {
echo ">";
}
echo "\n$padTag<$name";
foreach ($attrs as $key => $value) {
echo "\n$padTag".str_pad(" ", 3);
echo " $key=\"$value\"";
}
$inTag = $name;
$depth++;
}
function endElement($parser, $name) {
global $depth;
global $inTag;
global $closeTag;
$depth--;
if ($closeTag == TRUE) {
echo "</$name>";
$inTag = "";
} elseif ($inTag == $name) {
echo " />";
$inTag = "";
} else {
$padTag = str_repeat(str_pad(" ", 3), $depth);
echo "\n$padTag</$name>";
}
}
function contents($parser, $data) {
global $closeTag;
$data = preg_replace("/^\s+/", "", $data);
$data = preg_replace("/\s+$/", "", $data);
if (!($data == "")) {
echo ">$data";
$closeTag = TRUE;
} else {
$closeTag = FALSE;
}
}
function parseDEFAULT($parser, $data) {
$data = preg_replace("/</", "<", $data);
$data = preg_replace("/>/", ">", $data);
echo $data;
}
function pi_handler($parser, $target, $data) {
echo "<?$target $data?>\n";
}
echo "</pre>";
?>
Exemplo estruturado de elementos XML
Este primeiro exemplo mostra a estrutura de elementos iniciais num documento com distanciamento da margem.
Exemplo #1 Mostra estrutura do elemento XML
<?php
$file = "data.xml";
$depth = array();
function startElement($parser, $name, $attrs)
{
global $depth;
for ($i = 0; $i < $depth[$parser]; $i++) {
echo " ";
}
echo "$name\n";
$depth[$parser]++;
}
function endElement($parser, $name)
{
global $depth;
$depth[$parser]--;
}
$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, "startElement", "endElement");
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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User Contributed Notes
Exemplo estruturado de elementos XML - [1 notes]
roan at horning dot us ¶
3 years ago