PHP Parsing xml Format Data Tool Class Example

In this paper, an example is given to describe the tool class for PHP to parse xml format data. Share it for your reference, as follows:

class ome_xml {
  /**
  * xml Resources 
  *
  * @var    resource
  * @see    xml_parser_create()
  */
  public $parser;
  /**
  *  Resource coding 
  *
  * @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, $tagname, $value, $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);
    }
  }
}

PS: Here are several online tools for xml operation for your reference:

Online XML/JSON interconversion tool:
http://tools.ofstack.com/code/xmljson

Online Formatting XML/Online Compressing XML:
http://tools.ofstack.com/code/xmlformat

XML Online Compression/Formatting Tools:
http://tools.ofstack.com/code/xml_format_compress

XML code online formatting beautification tool:
http://tools.ofstack.com/code/xmlcodeformat

For more readers interested in PHP related content, please check the topics on this site: "Summary of PHP File Operation Skills", "Encyclopedia of PHP Array (Array) Operation Skills", "Summary of php String (string) Usage", "Summary of PHP Error and Exception Handling Methods", "Introduction to PHP Basic Syntax", "Introduction to php Object-Oriented Programming", "Introduction to php+mysql Database Operation Skills" and "Summary of php Common Database Operation Skills"

I hope this article is helpful to everyone's PHP programming.