Question

我显然在这里做了一些非常愚蠢的事情。谁能指导我？

以下是我设置的方法：

database.php中：

class Database extends PDO {

/**
 * Connect
 */
public function __construct($file = 'db_config.ini') {
    if (!$settings = parse_ini_file($file, TRUE)) throw new exception('Unable to open ' . $file . '.');

    $dns = $settings['database']['driver'] .
    ':host=' . $settings['database']['host'] .
    ((!empty($settings['database']['port'])) ? (';port=' . $settings['database']['port']) : '') .
    ';dbname=' . $settings['database']['schema'];

    parent::__construct($dns, $settings['database']['username'], $settings['database']['password']);
}

}

Team.php：

class Team {

private $_db;     

/**
 * getTeamMembers - Get team member UserIDs from TeamID
 * 
 * @param int $teamID
 * @return array UserIDs 
 */
public function getTeamMembers($teamID) {
    $result = "";
    $STH = $this->_db->query("SELECT FirstName FROM UserDetails WHERE TeamID = '$teamID'");
    $result = $STH->setFetchMode(PDO::FETCH_OBJ);

    return $result;        
}
}

网页代码：

try {
    $db = new Database();
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);  
    $team = new Team($db);
}
catch (PDOException $e) {
    echo "<p>Error connecting to database: </p>".$e->getMessage();
}

$teamMembers = $team->getTeamMembers($teamID);

错误讯息：

Call to a member function query() on a non-object in Team.php on line 20

第20行：$STH = $this->_db->query("SELECT FirstName FROM UserDetails WHERE TeamID = '$teamID'");

我做错了什么？

Answer 1

您正在使用$ db创建Team的实例，但它永远不会在团队级别中调用。

Answer 2

您正在使用$ db创建Team的实例，但它永远不会在团队级别中调用。

PHP PDO：在非对象上调用成员函数query（）

2 个答案: