SAX(Simple Application for XML) 구현하기

딱 이런 순서로 사용한다.

// initialize parser

$xml_parser = xml_parser_create();

// set callback functions

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

xml_set_character_data_handler($xml_parser, "characterData");

if (!xml_parse($xml_parser, $result, TRUE))

{

die(sprintf("XML error: %s at line %d",

xml_error_string(xml_get_error_code($xml_parser)),

xml_get_current_line_number($xml_parser)));

}

// clean up

xml_parser_free($xml_parser);

다음으로, 여기서 각각의 XML Node 처리 함수를 구현하면 끝난다.

// use this to keep track of which tag the parser is currently processing

$currentTag = "";

$currentAttr = array();

$AttrCount = 0;

$currentValue = "";

function startElement($parser, $name, $attrs) {

global $currentTag, $currentAttr;

$currentTag = $name;

// output opening HTML tags

switch ($name) {

case "CODE":

break;

case "DESC":

break;

case "VALUES":

break;

case "ENCRYPTED":

break;

case "DECRYPTED":

break;

default:

break;

}

}

// process data between tags

function characterData($parser, $data) {

global $currentTag, $currentAttr, $AttrCount, $currentValue;

global $code, $desc;

// format the data

switch ($currentTag) {

case "CODE":

$code = $data;

break;

case "DESC":

$desc = $data;

break;

case "VALUES":

$currentAttr[$AttrCount] = $data;

break;

case "ENCRYPTED":

$currentValue = $data;

break;

case "DECRYPTED":

$currentValue = $data;

break;

default:

break;

}

}

function endElement($parser, $name) {

global $currentTag, $AttrCount;

// output closing HTML tags

switch ($name) {

case "CODE":

break;

case "DESC":

break;

case "VALUES":

$AttrCount++;

break;

case "ENCRYPTED":

break;

case "DECRYPTED":

break;

default:

break;

}

// clear current tag variable

$currentTag = "";

}