php用mysqli模块连数据库Fatal error: Call to a member function query() 。。。。
出现了这个错误：Fatal error: Call to a member function query() on a non-object in D:\wamp\www\bills\model\UserDB.class.php on line 24
代码如下：
- PHP code
<!---ecms Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php class Database { var $mysqli; var $showError; public function _construct($configFile="config.inc.php") { require_once($configFile); $this->mysqli=new mysqli($dbhost,$dbuser,$dbpwd,$dbname); if(mysqli_connect_errno()) { echo "物品数据库连接失败！"; } } public function close() { if($this->mysqli) $this->mysqli->close(); $this->mysqli=FALSE; } public function _destruct() { $this->close(); } } class UserDB extends Database { public function queryUserByName($name) { $query="SELECT * FROM Users WHERE name='".$name."'"; if ($result=$this->mysqli->query($query)) //此处提示出错！！ return true; else return false; }
然后在另一个页面里调用上面的类对象：
- PHP code
<!---ecms Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php function __autoload($className) { include_once "../model/".$className.".class.php"; } $udb=new UserDB(); //明明初始化了，可是到类里面就出错？ $idb=new ItemsDB(); echo "jinlaile";// if(isset($_COOKIE("userInfo")))// {// $userInfo=unserialize($_COOKIE("userInfo"));// } switch($_GET["action"]) { case "register": $lvalue=$_POST; $rtmp=$udb->queryUserByName($lvalue["name"]); echo "alert"; if($rtmp) //这个名字没有注册 { $rusers=new User($lvalue); if($udb->addUser($rusers)) { setcookie("start",0); setcookie("userInfo",serialize($rusers)); setcookie("username",$rusers->name); header("Location:../view/index.ph<i>本文@来#源gaodai$ma#com搞$$代**码网</i><strong>搞代gaodaima码</strong>p"); } else header("Location:../view/errors.php?value=tianjia"); } break; }
——解决方案——————–
public function __construct($configFile=”config.inc.php”) //两个下划线
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转载请注明原文链接：php用mysqli模块连数据库Fatal error: Call to a member function query() 。解决思路
转载请注明原文链接：php用mysqli模块连数据库Fatal error: Call to a member function query() 。解决思路
