php操作xml类

 _xml = new DOMDocument('1.0', 'utf-8');
		$this->_xml->formatOutput = true;
	}
	/*
	 *设置XML版本
	 *@param $version string
	 */
	public function setVersion($version) {
		$this->_xml->xmlVersion = $version;
	}
	/*
	 *设置版本
	 *@param $encoding string
	 */
	public function setEncoding($encoding) {
		$this->_xml->encoding = $encoding;
	}
	/*
	 *设置standalone
	 *@param $standalone boolean,默认false
	 */
	public function setStandalone($standalone = false) {
		$this->_xml->xmlStandalone = $standalone;
	}
	/*
	 *加载xml
	 *@param $path string,已'/'结尾
	 *@param $name string,包含扩展名的文件名
	 */
	public function load($path, $name) {
		$this->_xml->load($path.$name);
	}
	/*
	 *添加节点
	 *@param $node string,待添加节点
	 *@param $prev string/array/null,上级节点
	 *@param $attr array,节点属性
	 *@param $text string,节点文本
	 */
	public function addNode($node, $prev = null, $attr = Array(), $text = '') {
		$node_object = $this->_xml->createElement($node);
        if ('' != $text) {
            $text_node = $this->_xml->createTextNode($text);
            $node_object->appendChild($text_node);
        }
		if(0 != count($attr)) {
			$this->addAttr($attr, $node_object);
		}
        if (null == $prev) {
            $this->_xml->appendChild($node_object);
        }
		if (is_string($prev) && null != $prev) {
            $list = $this->_xml->getElementsByTagName($prev);
            for($i = 0; $i < count($list); $i++) {
                $list->item($i)->appendChild($node);
            }
        }
		if (is_array($prev)) {
            foreach($prev as $k => $v) {
                $list = $this->_xml->getElementsByTagName($k);
                $list->item($v)->appendChild($node);
            }
        } 
	}
	/*
	 *添加属性
	 *@param $attr array
	 *@param $node object/array
	 */
	public function addAttr($attr, $node) {
		if (is_object($node)) {
			foreach($attr as $attr_name => $attr_value) {
				$tmp_attr = $this->_xml->createAttribue($attr_name);
				$tmp_attr->value = $attr_value;
				$node->appendChild($tmp_attr);
			}
		}
		if (is_array($node)) {
			foreach($node as $node_name => $node_index) {
				$node_collect = $this->_xml->getElementsByTagName($node_name);
				if (is_string($node_index)) {
					foreach($node_collect => $node_object) {
						foreach($attr as $attr_name => $attr_value) {
							$tmp_attr = $this->_xml->createAttribue($attr_name);
							$tmp_attr->value = $attr_value;
							$node_object->appendChild($tmp_attr);
						}
					}
				}
				if (is_array($node_index)) {
					for($index = 0; $index < count($nodex_indexs); $index++) {
						foreach($attr as $attr_name => $attr_value) {
							$tmp_attr = $this->_xml->createAttribue($attr_name);
							$tmp_attr->value = $attr_value;
							$node_collect->item($index)->appendChild($tmp_attr);
						}
					}
				}
			}
		}
	}
	/*
	 *删除节点
	 *@param $node object/array
	 */
	public function deleteNode($node) {
		if(is_object($node)){
			$this->_xml->removeChild($node);
		}
		if(is_array($node)){
			foreach($node as $node_name => $node_index) {
				$node_collect = document.getElementsByTagName($node_name);
				if (is_string($node_index)) {
					foreach($node_collect as $node_object) {
						$this->_xml->removeChild($node_object);
					}
				}
				if (is_array($node_index)) {
					foreach($node_index as $node_collect_index) {
						$this->_xml->remove($node_collect->item($node_collect_index));
						
					}
				}
			}
		}
	}
	/*
	 *删除属性
	 *@param $attr array
	 *@param $node object/array
	 */
	public function deleteAttr($attr, $node) {
		if(is_object($node)) {
			foreach($attr as $attr_name) {
				$node_object->removeAttribute($attr_name);
			}
		}
		if(is_array($node)) {
			foreach($node as $node_name => $node_index) {
				$node_collect = $this->_xml->getElementsByTagName($node_name);
				if (is_string($node_index)) {
					foreach($node_collect => $node_object) {
						foreach($attr as $attr_name) {
							$node_object->removeAttribute($attr_name);
						}
					}
				}
				if (is_array($node_index)) {
					for($index = 0; $index < count($nodex_indexs); $index++) {
						foreach($attr as $attr_name) {
							$node_collect->item($index)->removeAttribute($attr_name);
						}
					}
				}
			}
		}
	}
	/*
	 *保存
	 *@param $path string,已'/'结尾
	 *@param $name string,包含扩展名的文件名
	 */
	public function save($path, $name) {
		$this->_xml->save($path.$name);
		$this->_xml = new DOMDocument();
	}
}