86 lines
2.2 KiB
PHP
86 lines
2.2 KiB
PHP
<?php
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// $Id$
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// Global variables to track parsing state
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$xrds_open_elements = array();
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$xrds_services = array();
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$xrds_current_service = array();
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/**
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* Main entry point for parsing XRDS documents
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*/
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function xrds_parse($xml) {
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global $xrds_services;
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$parser = xml_parser_create_ns();
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xml_set_element_handler($parser, '_xrds_element_start', '_xrds_element_end');
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xml_set_character_data_handler($parser, '_xrds_cdata');
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xml_parse($parser, $xml);
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xml_parser_free($parser);
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return $xrds_services;
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}
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/**
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* Parser callback functions
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*/
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function _xrds_element_start(&$parser, $name, $attributes) {
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global $xrds_open_elements, $xrds_current_service;
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$xrds_open_elements[] = _xrds_strip_namespace($name);
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$path = strtoupper(implode('/', $xrds_open_elements));
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if ($path == 'XRDS/XRD/SERVICE') {
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foreach ($attributes as $attribute_name => $value) {
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if (_xrds_strip_namespace($attribute_name) == 'PRIORITY') {
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$xrds_current_service['priority'] = intval($value);
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}
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}
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}
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}
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function _xrds_element_end(&$parser, $name) {
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global $xrds_open_elements, $xrds_services, $xrds_current_service;
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$name = _xrds_strip_namespace($name);
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if ($name == 'SERVICE') {
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if (!isset($xrds_current_service['priority'])) {
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// If the priority attribute is absent, the default is infinity.
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$xrds_current_service['priority'] = PHP_INT_MAX;
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}
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$xrds_services[] = $xrds_current_service;
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$xrds_current_service = array();
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}
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array_pop($xrds_open_elements);
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}
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function _xrds_cdata(&$parser, $data) {
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global $xrds_open_elements, $xrds_services, $xrds_current_service;
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$path = strtoupper(implode('/', $xrds_open_elements));
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switch ($path) {
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case 'XRDS/XRD/SERVICE/TYPE':
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$xrds_current_service['types'][] = $data;
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break;
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case 'XRDS/XRD/SERVICE/URI':
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$xrds_current_service['uri'] = $data;
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break;
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case 'XRDS/XRD/SERVICE/DELEGATE':
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$xrds_current_service['delegate'] = $data;
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break;
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case 'XRDS/XRD/SERVICE/LOCALID':
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$xrds_current_service['localid'] = $data;
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break;
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}
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}
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function _xrds_strip_namespace($name) {
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// Strip namespacing.
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$pos = strrpos($name, ':');
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if ($pos !== FALSE) {
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$name = substr($name, $pos + 1, strlen($name));
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}
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return $name;
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}
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