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php操作XML增删查改

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PHP中文网Original
2016-05-25 17:06:281296browse

以前写的一个数据量不大的小网站用到的,用xml代替数据库的玩意,献丑了

这短代码的执行效率太低了。循环插入1000条数据 会超时。

[代码][PHP]代码

class XMLDataBase extends DomDocument{
 var $dbname; //属性 数据库文件名 同根元素名称
 var $dbpath; //属性 数据库路径
 //var $debug;  //属性 调试标志
 var $debug=true;//开启调试模式
 public function XMLDataBase($dbname,$dbpath){ //构造函数
  if(empty($dbname)){
   if($this->debug)echo "创建数据库文件失败,请检查实例参数";
   return false;
  }else{
   $this->dbname = $dbname; //将数据库命名为指定名称
   $this->dbpath = $dbpath; //为数据指定路径   
   if(!file_exists($dbpath."/".$this->dbname.".xml")){ //如果没有数据库文件
    $xmlstr = 'dbname.' sn="0"/>';
    $this->loadXML($xmlstr);
    $this->save($dbpath."/".$this->dbname.".xml"); //创建数据库文件
   }
   $this->load($dbpath."/".$this->dbname.".xml"); //加载数据库文件
  }
  return true;
 }

 //插入数据
 public function insert_xml($myfields,$values,$mytype){
  if(empty($mytype)){ //如果类型为空,返回跟节点
   $Root = $this->documentElement;
  }else{
   $Root = $this->getElementsByTagName($mytype); //取得$mytype节点
   $Root = $Root->item(0);
   if(empty($Root->nodeValue)){ //判断$mytype节点为空则建立之, empty() 这个变量存在吗?不存在就对了!! 
    $this->InserTabeNode($mytype);
    $Root = $this->getElementsByTagName($mytype);
    $Root = $Root->item(0);
   }
  }
  $arrfield = explode("#cut#", $myfields);
  $arrval = explode("#cut#", $values);
  //获取插入记录
  $AutoID = $this->AutoKey();
  $Node_AutoID= $this->createElement("autoid");
  $text= $this->createTextNode($AutoID);
  $Node_AutoID->appendChild($text);
  $i=0;
  foreach($arrfield as $myfield){
   ${$node}=$arrval[$i];
   ${"Node_".$myfield} = $this->createElement($myfield);
   $text = $this->createTextNode(${$node});
   ${"Node_".$myfield}->appendChild($text);
   $i++;
  }
  //建立一条记录
  $Node_record = $this->createElement("record");
  $Node_record->appendChild($Node_AutoID);
  foreach($arrfield as $fieldn){
   $Node_record->appendChild(${"Node_".$fieldn});
  }
  //加入到$dbtable结点下
  $Root->appendChild($Node_record);
  //更新 根节点SN
  $this->documentElement->setAttribute("sn","$AutoID");
  //保存 
  $this->save($this->dbpath."/".$this->dbname.".xml");
  return true;
 }
 
 //修改记录
 public function update_xml($AutoID,$mytype){
  if(empty($mytype)){ //如果类型为空,返回跟节点
   $Root = $this->documentElement;
   $xpath = new DOMXPath($this);
   $Node_Record = $xpath->query("//record[autoid=$AutoID]");
  }else{
   $Root = $this->getElementsByTagName($mytype); //取得$mytype节点
   $Root = $Root->item(0);
   $xpath = new DOMXPath($this);
   $Node_Record = $xpath->query("/$this->dbname/$mytype/record[autoid=$AutoID]");
  }//end if

  if(empty($Node_Record->item(0)->nodeName)) echo "没有查询到要修改的记录\r\n";
  $K=0;
  foreach ($Node_Record->item($i)->childNodes as $articles){
   $Field[$K]=$articles->textContent;
   echo "$articles->nodeName\r\n";
   $K++;
  }
 }
 
 //保存记录
 public function besave_xml($AutoID,$values,$mytype){
  if(empty($mytype)){ //如果类型为空,返回跟节点
   $Root = $this->documentElement;
   $xpath = new DOMXPath($this);
   $Node_Record = $xpath->query("//record[autoid=$AutoID]");
  }else{
   $Root = $this->getElementsByTagName($mytype); //取得$mytype节点
   $Root = $Root->item(0);
   $xpath = new DOMXPath($this);
   $Node_Record = $xpath->query("/$this->dbname/$mytype/record[autoid=$AutoID]");
  }//end if
  if(empty($Node_Record->item(0)->nodeValue)){ //如果记录不存在
         if($this->debug)echo "AutoID={$AutoID}的记录不存在于{$mytype}节点中,请检查传入参数!";
   return false;
  }
  $Replace = explode("#cut#", $values);
  $temparr=array_reverse($Replace);
  //array_push($temparr,$AutoID);
  $temparr[]=$AutoID;  //用 array_push() 来给数组增加一个单元,还不如用 $array[] = ,因为这样没有调用函数的额外负担。 --By PHP Manual
  $Replace=array_reverse($temparr);
  $K=0;
  //修改
  foreach ($Node_Record->item(0)->childNodes as $articles){
   $Node_newText = $this->createTextNode($Replace[$K]);
   $articles->replaceChild($Node_newText,$articles->lastChild);//*************** 有点疑问
   $K++;
  }
  $this->save($this->dbpath."/".$this->dbname.".xml");
  return true;
 }

 //筛选或者统计
 public function select_xml($sfield,$keyword,$mytype,$rows,$isonly){
 //$sfield 指定字段 $mytype分类名称 $rows循环输出时指定记录条数 $isonly判断指定关键字记录是否存在
 if($sfield == '') $sfield='autoid'; //设定字段默认值
 //if($keyword=='') $keyword='1';
  $xpath = new DOMXPath($this);
  //if(empty($keyword)) return 0;
  if($mytype == ''){
   $querystr = "//record[contains($sfield,'$keyword')]";
   $Node_Record = $xpath->query($querystr);
  }else{
   $querystr = "/$this->dbname/$mytype/record[contains($sfield,'$keyword')]";
   $Node_Record = $xpath->query($querystr);
  }//end if
  $Node_Record_Length = $Node_Record->length; //取得记录总数
  if($isonly==1){
   if($Node_Record_Length>0) return 999;
  }
  
  //循环输出字段及其内容
  if($Node_Record_Length < 1) return 0;
  $rerows = array(); //记录集数组
  $rerow = array();  //单条记录数组
  for($i=0;$iitem($i)->childNodes as $articles){
    $Field[$K]=$articles->textContent;
    $rerow["$articles->nodeName"] = $Field[$K]; //节点名 => 节点值 推入数组
    $K++;
   }
   $rerows[$i]=$rerow;
  }//for end
  //不知道还有没有更好的方法反序结果
  $echorows=array_reverse($rerows); //反序排列返回的数组
  $countall=count($echorows);   //统计数组记录总数
  if($rows>0)$countall=$rows; //如果指定行数 更改数据总数
  if($rows>count($echorows))$countall=count($echorows); //如果指定行数大于总数 则总数不变
  $myrs=array(); //新建的记录集数组
  for($j=0;$jdocumentElement;
   $xpath = new DOMXPath($this);
   $Node_Record = $xpath->query("//record[autoid=$AutoID]");
  }else{
   $Root = $this->getElementsByTagName($mytype); //取得$mytype节点
   $Root = $Root->item(0);
   $xpath = new DOMXPath($this);
   $Node_Record = $xpath->query("/$this->dbname/$mytype/record[autoid=$AutoID]");
  }
  //查询选择删除的记录
  if(empty($Node_Record->item(0)->nodeValue)){ //如果记录不存在
         if($this->debug)echo "AutoID={$AutoID}的记录不存在于{$mytype}节点中,请检查传入参数!"; //输出相应信息
   return false; //返回假
  }
  $Root->removeChild($Node_Record->item(0)); //在节点中移除
  $this->save($this->dbpath."/".$this->dbname.".xml");
  return true; //返回真
 }

 //插入类别节点
 public function InserTabeNode($mytype){
  $Root = $this->documentElement;
  $Node_record = $this->createElement($mytype);
  $Root->appendChild($Node_record);
  $this->save($this->dbpath."/".$this->dbname.".xml");
 }
  
 public function AutoKey(){ //产生自增流水号
  //读取根节点sn属性
  $Root = $this->documentElement;
  if($Root->hasAttributes()) $attributes = $Root->attributes;
        $AutoKey = $attributes->item(0)->nodeValue+1; //sn原值增加1
  return $AutoKey;
 }
}//class end




//调用就类似这丫

	$fields="item#cut#description#cut#quantity#cut#amount#cut#email#cut#email2#cut#paytime#cut#posttime";
	$values="$item#cut#$description#cut#$quantity#cut#$amount#cut#$email#cut#$email2#cut#$paytime#cut#$posttime";
	$Myxml = new XMLDataBase("orderlist",XMLDATAPATH);
	if($Myxml->insert_xml($fields,$values,""))
	{
	ShowMsg("订单发布成功!","orderlist.php");
	exit();
	}

                   

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