1 
     xmlName=$xmlName; 14         $this->rootKey = $rootKey; 15          16         if(!file_exists($this->xmlName)) 17          { 18             $this->doc = new DOMDocument('1.0', 'utf-8'); 19             $rootKey = $this->doc->createElement($this->rootKey);//create root key 20             $this->rootKey = $this->doc->appendChild($rootKey); 21             $this->doc->save($this->xmlName); 22          }else 23          { 24             $this->doc = new DOMDocument();             25             $this->doc->load($xmlName); 26  27          } 28           29             $this->doc->formatOutput = true; 30      31         } 32      33  34     /* 35      创建子节点 36      @param $childNode :要创建的子节点及属性$child_attr_array=null；     37      @param $parentNode：要创建的子节点的父节点及属性 $parent_attr_array=null； 38     */ 39     public function createChildNode($childNode,$child_attr_array=null,$parentNode,$parent_attr_array=null) 40     { 41         $cnode = $this->doc->createElement($childNode); 42  43         //获取要添加的子节点的父节点 44         if($parent_attr_array!=null){ 45             foreach($parent_attr_array as $attr_key=>$attr_value) 46             { 47                 $cnode = $this->getNodeByAttr($parentNode,$attr_key,$attr_value)->appendChild($cnode); 48             } 49         }else 50         {        //避免创建父节点即：在父节点下创建子节点     51                 $cnode = $this->doc->getElementsByTagName($parentNode)->item(0)->appendChild($cnode); 52         } 53  54          55            //设置子节点值 56         //$cnode->nodeValue=$chileNodeValue; 57  58         //设置属性 59         if($child_attr_array!=null) 60         { 61             foreach($child_attr_array as $attr_key=>$attr_value) 62             { 63                 $cnode->setAttribute($attr_key,$attr_value); 64             } 65         } 66  67  68  69     } 70  71     /* 72       获取具有某属性的节点 73       @param 节点名$nodeName,及其属性和值$attrName,$attrValue 74       @return DOMNode  75     */ 76     public function getNodeByAttr($nodeName,$attrName,$attrValue) 77     { 78         $nodeList = $this->doc->getElementsByTagName($nodeName); 79  80         for($i=0; $i<$nodeList->length;$i++) 81         { 82             $attrList = $nodeList->item($i)->getAttributeNode($attrName); 83             if($attrList->value == $attrValue) 84             { 85                 return $nodeList->item($i); 86                  87                 //echo 'okkkkkk'.'
';; 88             } 89         90         } 91          92     } 93      94  95     //删除具有某个属性的节点 96     public function delete_Node($nodeName,$attrName,$attrValue) 97     { 98         try 99         {100            $delete_Node = $this->getNodeByAttr($nodeName,$attrName,$attrValue);101            $delete_Node->parentNode->removeChild($delete_Node);102 103         }catch(DOMException $e)104         {105             echo 'fail!';106         }107     }108 109 110     //创建节点属性111     public function createNodeAttribute($nodeName,$attr,$aValue)112     {113          $nodes = $this->doc->getElementsByTagName($nodeName);114           for($i=0; $i<$nodes->length;$i++)115         {116           $nodeValue = $nodes->item($i)->nodeValue.'
';117         }118         119         //$node->item[0]->setAttribute($attr,$aValue);120 121     }122 123     /*124      保存xml125     */126     public function saveXml()127         {128            129            $this->doc->save($this -> xmlName);130         }131 132 133 134    135 136 }137 138 //实例操作139   $myXml = new xmlMessage("opera.xml","世界");//创建一个以"世界"为根节点的xml文件140  141   $myXml->createChildNode("国家",array('name'=>'中国','人口'=>'1亿'),'世界');142 143   $myXml->createChildNode("国家",array('name'=>'英国','人口'=>'50millon'),'世界');144 145   $myXml->createChildNode("山东",array('city'=>'济南','note'=>'省会'),'国家',array('name'=>'英国'));146   $myXml->createChildNode("浙江",'','国家',array('name'=>'英国'));147 148   //$myXml->createChildNode("历城",array('city'=>'济南','note'=>'区'),'山东');149 150 151   //$myXml->createNodeAttribute("国家","人口",125);152 153   //$myXml->getNodeByAttr("国家",'name','英国');154   //$myXml->delete_Node("历城",'city','济南');155 156 157   $myXml->saveXml();158 159 ?>