0
我一直在试图解决这一问题的错误做准备():PHP Fatal error: Call to a member function prepare() on string in /home/...../lib/library.php on line 91
我也检查此链接:Reference - What does this error mean in PHP? ,我似乎不知道如何把它与我的问题在眼前。谁能帮忙?这是脚本行受到影响:如何解决调用一个成员函数的字符串
public function Login($username, $password)
{
try {
$db = DB();
$query = $db->prepare("SELECT user_id FROM users WHERE (username=:username OR email=:username) AND password=:password");
$query->bindParam("username", $username, PDO::PARAM_STR);
$enc_password = hash('sha256', $password);
$query->bindParam("password", $enc_password, PDO::PARAM_STR);
$query->execute();
if ($query->rowCount() > 0) {
$result = $query->fetch(PDO::FETCH_OBJ);
return $result->user_id;
} else {
return false;
}
} catch (PDOException $e) {
exit($e->getMessage());
}
}
'DB()'没有返回PDO'的'一个实例。参见http://php.net/manual/en/book.pdo.php和http://stackoverflow.com/questions/5346186/pdo-call-toa-a-member-function-prepare-on-a-non -目的 –