PHP编程出现的MySQL连接错误

php项目中，在循环里面再使用查询，出现了连接错误

代码：

$usr = new User();$v = $usr->getAllDoctor();while ($row = mysql_fetch_array($v)){ $id = $row["id"]; $docinfo = $usr->getDoctorInfoByDID($id); //医院 $hos = new hospital(); $result = $hos->queryOneHospital("id", $docinfo["hospitalid"]==""?0:$docinfo["hospitalid"]); $hname = $result == null?"":$result["name"]; //简单起见，以下内容省略}

当运行时，一直提示数据库连接错误，原来是在循环里面new对象时出现的错误

class hospital { //private var $hospitalinfo; var $mySql = false; function __construct() { $this->mySql = DBManagerFactory::getInstance ();}}

看到每次new对象时都要重新连接数据库，导致数据库的多次重复连接

正确的代码改为如下后，程序结果正常

$usr = new User();$hos = new hospital();$v = $usr->getAllDoctor();while ($row = mysql_fetch_array($v)){ $id = $row["id"]; $docinfo = $usr->getDoctorInfoByDID($id); //医院 $result = $hos->queryOneHospital("id", $docinfo["hospitalid"]==""?0:$docinfo["hospitalid"]); $hname = $result == null?"":$result["name"]; //简单起见，以下内容省略}