PHP operates XML with full-featured xml operation class_PHP tutorial

编程之家提供一个功能齐全的xml操作类

/* xml操作类 */
class operXml
{
    var $parser;

    public function __construct()
    {
        $this->parser = xml_parser_create();
        xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
        xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1);

        xml_set_object($this->parser, $this);
        xml_set_element_handler($this->parser, "tag_open", "tag_close");
        xml_set_character_data_handler($this->parser, "cdata");
    }

    public function parse($xmlStr="",$endtag=true)
    {
     $this->endtag = $endtag;
     $this->xmlStr = $xmlStr;
     $this->tree = new stdClass;
     $this->tree->tag = "root";
     $this->tree->props = new stdClass;
     $this->tree->children = array();
     $this->tree->p = NULL;
     $this->tree->level = -1;
     $this->deep = 0;
     $this->pList = array($this->tree);
     xml_parse($this->parser, $this->xmlStr);
    if(count($this->tree->children)>0)
        $this->root = $this->tree->children[0];
    else
       $this->root = NULL;
    return $this;
   }

   public function tag_open($parser, $tag, $attributes)
   {
  $o = new stdClass;
  $o->p = $this->pList[$this->deep];
  $o->index = count($o->p->children);
  $o->level = $o->p->level 1;
  $o->tag = $tag;
  $o->props = new stdClass;
  while(list($key,$value)=each($attributes))
  $o->props->{$key} = $value;
  $o->value = "";
  $o->children = array();
  array_push($o->p->children,$o);
  $this->deep ;
  $this->pList[$this->deep] = $o;
    }

    public function cdata($parser, $cdata)
    {
        $this->pList[$this->deep]->value = $cdata;
    }

public function tag_close($parser, $tag)
{
$this->deep--;
}

public function getNodeByProp() // According to Attribute name and value get the node,
{          // Parameters: attribute name, attribute value 1, attribute value 2, attribute value 3,...
 $args = func_get_args();
 $node = $ this->tree;
for($i=1;$i {
$node = $this->_getNodeByProp($node,$args [0],$args[$i]);
if($node==NULL) break;
}
return $node;
}

public function getChildByTag( $node,$tag) // Get the node labeled $tag under the $node node
{
for($i=0;$ichildren);$i )
{
if($node->children[$i]->tag==$tag)
return $node->children[$i];
}
return NULL;
}

public function getChildsByTag($node,$tag) // Get the node with the tag $tag under the $node node and return the node list array
{
$rs = array();
for($i=0;$ichildren);$i )
if($node->children[$i]->tag= =$tag)
array_push($rs,$node->children[$i]);
return $rs;
}

public function addRoot($tag) // Add root node
{
$this->tree->children = array();
$this->root = $this->addChild($this->tree,$ tag);
return $this->root;
}

public function addChild($node,$tag) // Add a node with the tag $tag under the $node node, and Return the added node
{
$o = new stdClass;
$o->p = $node;
$o->level = $node->level 1;
$o->index = count($node->children);
$o->tag = $tag;
$o->props = new stdClass;
$o- >value = "";
$o->children = array();
array_push($node->children,$o);
return $o;
}

public function delete($node) // Delete $node node
{
$p = $node->p;
array_splice($p->children,$node-> ;index,1);
for($i=0;$ichildren);$i )
$p->children[$i]->index = $i;
}

public function move($dstNode,$srcNode) // Move srcNode below $dstNode
{
$this->delete($srcNode);
$srcNode->p = $dstNode;
$srcNode->level = $dstNode->level 1;
$srcNode->index = count($dstNode->children) ;
array_push($dstNode->children,$srcNode);
}

public function __toString() // Return xml format string
{
$s = "" ;
for($i=0;$itree->children);$i )
$s .= $this->traversalNodeToXml($this-> tree->children[$i],$this->endtag);
return $s;
}

 public function save($xmlFile)  // 保存成xml格式文件
 {
  $content = $this->__toString();
  
  $fp = @fopen($xmlFile,"w") or die("创建文件失败：".$xmlFile);
  @fwrite($fp,$content);
  @fclose($fp);
  @chmod($xmlFile,0777);
 }
 
 private function traversalNodeToXml($treeNode,$endtag)
 {
  $space = "";
  $space = str_pad($s,$treeNode->level*2," ",STR_PAD_LEFT);
  $s = $space."<".$treeNode->tag;
  while(list($key,$value)=each($treeNode->props))
   $s .= " $key="$value"";
  $childCount = count($treeNode->children);
  if($childCount==0)
  {
   if($treeNode->value!="" || $endtag)
    $s .= ">".$treeNode->value."tag."> ";
   else
    $s .= "/> ";
   return $s;
  }
  
  $s .= "> ";
  for($i=0;$i<$childCount;$i )
   $s .= $this->traversalNodeToXml($treeNode->children[$i],$endtag);
  $s .= $space."tag."> ";
  return $s;
 }
 
 private function _getNodeByProp($node,$propName,$propValue)
 {
  for($i=0;$ichildren);$i )
  {
   $anode = $node->children[$i];
   if(isset($anode->props) && isset($anode->