@H_502_0@本文实例讲述了PHP解析xml格式数据工具类。分享给大家供大家参考，具体如下：

• xml资源
• @var resource
• @see xml_parser_create()
  */
  public $parser;
  /**
• 资源编码
• @var string
  */
  public $srcenc;
  /**
• target encoding
• @var string
  */
  public $dstenc;
  /**
• the original struct
• @access private
• @var array
  */
  public $_struct = array();
  /**
• Constructor
• @access public
• @param mixed [$srcenc] source encoding
• @param mixed [$dstenc] target encoding
• @return void
• @since
  */
  function SofeeXmlParser($srcenc = null,$dstenc = null) {
  $this->srcenc = $srcenc;
  $this->dstenc = $dstenc;
  // initialize the variable.
  $this->parser = null;
  $this->_struct = array();
  }
  /**
• Parses the XML file
• @access public
• @param string [$file] the XML file name
• @return void
• @since
  */
  function xml2array($file) {
  //$this->SofeeXmlParser('utf-8');
  $data = file_get_contents($file);
  $this->parseString($data);
  return $this->getTree();
  }
  function xml3array($file){
  $data = file_get_contents($file);
  $this->parseString($data);
  return $this->_struct;
  }
  /**
• Parses a string.
• @access public
• @param string data XML data
• @return void
  /
  function parseString($data) {
  if ($this->srcenc === null) {
  $this->parser = xml_parser_create();
  } else {
  if($this->parser = xml_parser_create($this->srcenc)) {
  return 'Unable to create XML parser resource with '. $this->srcenc .' encoding.';
  }
  }
  if ($this->dstenc !== null) {
  @xml_parser_set_option($this->parser,XML_OPTION_TARGET_ENCODING,$this->dstenc) or die('Invalid target encoding');
  }
  xml_parser_set_option($this->parser,XML_OPTION_CASE_FOLDING,0); // lowercase tags
  xml_parser_set_option($this->parser,XML_OPTION_SKIP_WHITE,1); // skip empty tags
  if (!xml_parse_into_struct($this->parser,$data,$this->_struct)) {
  /printf("XML error: %s at line %d",xml_error_string(xml_get_error_code($this->parser)),xml_get_current_line_number($this->parser)
  );*/
  $this->free();
  return false;
  }
  $this->_count = count($this->_struct);
  $this->free();
  }
  /**
• return the data struction
• @access public
• @return array
  */
  function getTree() {
  $i = 0;
  $tree = array();
  $tree = $this->addNode(
  $tree,$this->_struct[$i]['tag'],(isset($this->_struct[$i]['value'])) ? $this->_struct[$i]['value'] : '',(isset($this->_struct[$i]['attributes'])) ? $this->_struct[$i]['attributes'] : '',$this->getChild($i)
  );
  unset($this->_struct);
  return $tree;
  }
  /**
• recursion the children node data
• @access public
• @param integer [$i] the last struct index
• @return array
  */
  function getChild(&$i) {
  // contain node data
  $children = array();
  // loop
  while (++$i < $this->_count) {
  // node tag name
  $tagname = $this->_struct[$i]['tag'];
  $value = isset($this->_struct[$i]['value']) ? $this->_struct[$i]['value'] : '';
  $attributes = isset($this->_struct[$i]['attributes']) ? $this->_struct[$i]['attributes'] : '';
  switch ($this->_struct[$i]['type']) {
  case 'open':
  // node has more children
  $child = $this->getChild($i);
  // append the children data to the current node
  $children = $this->addNode($children,$tagname,$value,$attributes,$child);
  break;
  case 'complete':
  // at end of current branch
  $children = $this->addNode($children,$attributes);
  break;
  case 'cdata':
  // node has CDATA after one of it's children
  $children['value'] .= $value;
  break;
  case 'close':
  // end of node,return collected data
  return $children;
  break;
  }
  }
  //return $children;
  }
  /**
• Appends some values to an array
• @access public
• @param array [$target]
• @param string [$key]
• @param string [$value]
• @param array [$attributes]
• @param array [$inner] the children
• @return void
• @since
  */
  function addNode($target,$key,$value = '',$attributes = '',$child = '') {
  if (!isset($target[$key]['value']) && !isset($target[$key][0])) {
  if ($child != '') {
  $target[$key] = $child;
  }
  if ($attributes != '') {
  foreach ($attributes as $k => $v) {
  $target[$key][$k] = $v;
  }
  }
  $target[$key]['value'] = $value;
  } else {
  if (!isset($target[$key][0])) {
  // is string or other
  $oldvalue = $target[$key];
  $target[$key] = array();
  $target[$key][0] = $oldvalue;
  $index = 1;
  } else {
  // is array
  $index = count($target[$key]);
  }
  if ($child != '') {
  $target[$key][$index] = $child;
  }
  if ($attributes != '') {
  foreach ($attributes as $k => $v) {
  $target[$key][$index][$k] = $v;
  }
  }
  $target[$key][$index]['value'] = $value;
  }
  return $target;
  }
  /**
• Free the resources
• @access public
• @return void
  **/
  function free() {
  if (isset($this->parser) && is_resource($this->parser)) {
  xml_parser_free($this->parser);
  unset($this->parser);
  }
  }
  }