当我尝试将 mysql 与 php 连接时，我的 XAMPP 服务器返回错误

Question

class poll
{
private $db;

public function __construct($dbConnection)
{
    $this->db = $dbConnection;
}

public function getPollData(){
    $sql = "SELECT poll_question, yes, no FROM poll WHERE poll_id=1";
    $statement = $this->db->prepare($sql);
    $statement = execute();
    $pollData = $statement->fetchObject();
    return $pollData;
}

}

在我尝试在我的代码中运行这个类后，它说我

致命错误：调用未定义的函数 execute() C:\xampp\htdocs\poll\models\poll.php 在第 21 行

我正在使用 xampp，但无法理解为什么它不起作用。

Answer 1

应该是$statement->execute();

class poll

{

private $db;

public function __construct($dbConnection)
{
    $this->db = $dbConnection;
}

public function getPollData(){
    $sql = "SELECT poll_question, yes, no FROM poll WHERE poll_id=1";
    $statement = $this->db->prepare($sql);
    $statement = $statement->execute(); // You miss the $statement var
    $pollData = $statement->fetchObject();
    return $pollData;
}
}

Answer 2

修改

$statement = execute();

到

 $statement = $statement->execute();