PHP操作XML功能齐全的xml操作类_PHP教程

/* 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() // 根据属性名称和值取得节点，
{ // 参数：属性名称,属性值1,属性值2,属性值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) // 取得$node节点下标签为$tag的节点
{
for($i=0;$ichildren);$i )
{
if($node->children[$i]->tag==$tag)
return $node->children[$i];
}
return NULL;
}

public function getChildsByTag($node,$tag) // 取得$node节点下标签为$tag的节点，返回节点列表数组
{
$rs = array();
for($i=0;$ichildren);$i )
if($node->children[$i]->tag==$tag)
array_push($rs,$node->children[$i]);
return $rs;
}

public function addRoot($tag) // 添加根节点
{
$this->tree->children = array();
$this->root = $this->addChild($this->tree,$tag);
return $this->root;
}

public function addChild($node,$tag) // 在$node节点下添加标签为$tag的节点，并返回添加的节点
{
$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($node) // 删除$node节点
{
$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) // 将srcNode移动到$dstNode下面
{
$this->delete($srcNode);
$srcNode->p = $dstNode;
$srcNode->level = $dstNode->level 1;
$srcNode->index = count($dstNode->children);
array_push($dstNode->children,$srcNode);
}

public function __toString() // 返回xml格式串
{
$s = "";
for($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->