PHP解析xml格式数据工具类示例讲解

class ome_xml {  /**  * 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 _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：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：

XML代码在线格式化美化工具：
http://tools.jb51.net/code/xmlcodeformat

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