It  set up processing instruction (PI) handler

Example

<?php
$xmlparser=xml_parser_create();

function char($xmlparser,$data) {
echo $data;
}

function pi_handler_func($xmlparser, $target, $data) {
echo $target.$data;
}

xml_set_character_data_handler($xmlparser,”char”);
xml_set_processing_instruction_handler($xmlparser, “pi_handler_func”);
$fp=fopen(“book.xml”,”r”);

while ($data=fread($fp,4096)){
xml_parse($xmlparser,$data,feof($fp));
}

xml_parser_free($xmlparser);
?>

It uses XML Parser within an object

Example

<?php
class XMLParser{
var $xmlparser;
function XMLParser(){
$this->xmlparser = xml_parser_create();
xml_set_object($this->xmlparser, $this);
xml_set_character_data_handler($this->xmlparser,”char”);
xml_set_element_handler($this->xmlparser, “start_tag”,”end_tag”);
}

function parse($data){
xml_parse($this->xmlparser, $data);
}

function parse_File($xmlfile){
$fp = fopen($xmlfile, ‘r’);
while ($xmldata = fread($fp, 4096)){
if(!xml_parse($this->xmlparser, $xmldata)){
die(“Failed”);
}
}
}

function start_tag($xmlparser, $tag, $attributes){
print $tag . “n”;
}

function end_tag(){}

function char($xmlparser,$data){
echo $data . “n”;
}

function close_Parser(){
xml_parser_free($this->xmlparser);
}
}

$myxmlparser = new XMLParser();
$myxmlparser->parse_File(“book.xml”);
$myxmlparser->close_parser();
?>

It set up  notation declaration handler

Example

<?php
$parser=xml_parser_create();

function char($parser,$data){
echo $data;
}

function not_decl_func($parser,$not,$base,$sysID,$pubID) {
echo $not.$sysID.$pubID;
}

xml_set_character_data_handler($parser,”char”);
xml_set_notation_decl_handler($parser, “not_decl_func”);
$fp=fopen(“test.xml”,”r”);

while ($data=fread($fp,4096)) {
xml_parse($parser,$data,feof($fp)) or die(“Failed”);
}

xml_parser_free($parser);
?>

It set up  external entity reference handler

Example

<?php
$xmlparser=xml_parser_create();

function char($xmlparser,$data){
echo $data;
}

function ext_func($xmlparser,$ent,$base,$sysID,$pubID) {
echo $ent.”<br />”;
echo $sysID.”<br />”;
echo $pubID.”<BR />”;
}

xml_set_character_data_handler($xmlparser,”char”);
xml_set_external_entity_ref_handler($xmlparser, “ext_func”);
$fp=fopen(“book.xml”,”r”);

while ($data=fread($fp,4096))
{
xml_parse($xmlparser,$data,feof($fp)) or die(“Failed”);
}

xml_parser_free($xmlparser);
?>

It set up end namespace declaration handler

It set up start and end element handlers

Example
<?php
$xmlparser=xml_parser_create();

function start($xmlparser,$element_name,$element_attrs) {
echo $element_name;
}

function stop($xmlparser,$element_name){
echo “n”;
}

function char($xmlparser,$data) {
echo $data;
}

xml_set_element_handler($xmlparser,”start”,”stop”);
xml_set_character_data_handler($xmlparser,”char”);
$fp=fopen(“book.xml”,”r”);

while ($data=fread($fp,4096)){
xml_parse($xmlparser,$data,feof($fp));
}

xml_parser_free($xmlparser);
?>

It set up default handler

Example

<?php
$xmlparser=xml_parser_create();
xml_set_default_handler($xmlparser,”default”);
$fp=fopen(“book.xml”,”r”);
while ($data=fread($fp,4096)){
xml_parse($xmlparser,$data,feof($fp));
}
xml_parser_free($xmlparser);
?>

It set up character data handler

Example

<?php
$parser=xml_parser_create();
function func($parser,$val) {
echo $val;
}
xml_set_character_data_handler($parser,”func”);
$fp=fopen(“book.xml”,”r”);
while ($data=fread($fp,4096)){
xml_parse($parser,$data,feof($fp)) ;
}
xml_parser_free($parser);
?>

It sets options in an XML parser

Example

<?php
$xmlparser = xml_parser_create();
xml_parser_set_option($xmlparser, XML_OPTION_SKIP_WHITE, 1);
xml_parser_free($xmlparser);
?>

It returns options from an XML parser

Example

<?php
$xmlparser = xml_parser_create();
echo xml_parser_get_option($xmlparser, XML_OPTION_CASE_FOLDING);
xml_parser_free($xmlparser);
?>