Question

我希望在这篇文章中让我的生活更轻松：

PDO::bindParam in a foreach loop, all values are being set as the same?

还有其他几个......

我尝试了几种变体来让我的代码工作（看消息），但是没有结果我必须在我的班级中使用方法：

public function getMessages($locationId, $name) {
    if(!empty($name)) {

        $query = 'SELECT * FROM (SELECT * FROM sms WHERE location_id=:locationId ORDER BY id DESC LIMIT 5) AS SOURCE ORDER BY id ASC';
        $parameters = array(':locationId' => $locationId);

        $row = $this->returnDataObject($query, $parameters);

        while ($row) {
            $this->fetchData($row, $biggestId, $name);
        }

        $this->updateSessionKey($locationId, $name);
    }
}

另一个：

public function returnDataObject($query, $parameters) {
    var_dump($query); 
    var_dump($parameters);

    $dataObject = $this->dbh->prepare($query);

    foreach ($parameters as $key => &$value) {
        $dataObject->bindParam($key, $value);
    }

    $dataObject->execute();
    $row = $dataObject->fetch(PDO::FETCH_OBJ);

    return $row;

}

我试过了：

foreach ($parameters as $key => &$value) {
and:
foreach ($parameters as $key => $value) {

我试过了：

$dataObject->bindParam($key, $value);
and:
$dataObject->bindValue($key, $value);

我也试过在getMessages方法中死掉（＆＃39;我在getMessages方法＆＃39;）; 但是我无法做到那么远......

我应该采取哪些不同的方式来使这段代码有效？

我感谢任何帮助！

编辑：

我对bigId表示不好，但声称是最大的：

$biggestId = $this->getBiggestId($locationId);

但是修复并没有解决整个问题。第一种方法如果是：

则执行

public function getMessages($locationId, $name) {
    if(!empty($name)) {
        $biggestId = $this->getBiggestId($locationId);

        $messages = $this->dbh->prepare('SELECT * FROM (SELECT * FROM sms WHERE location_id=:locationId ORDER BY id DESC LIMIT 5) AS SOURCE ORDER BY id ASC');
        $messages->bindParam(':locationId', $locationId);
        $messages->execute();

        while ($row = $messages->fetch(PDO::FETCH_OBJ)) {
            $this->fetchData($row, $biggestId, $name);
        }

        $_SESSION[$name] = $biggestId;
    }
}

但是我想使用这个方法，所以我不必手动使用bindParam / BindValue，returnDataObject方法的功能会让我的生活更轻松......

Answer 1

进行以下更改：

使用fetchAll()代替fetch()
使用fetchAll()后，请使用foreach而不是while循环。

<强> returnDataObject：

public function returnDataObject($query, $parameters) {
    $dataObject = $this->dbh->prepare($query);

    foreach ($parameters as $key => &$value) {
        $dataObject->bindParam($key, $value);
    }

    $dataObject->execute();
    $rows = $dataObject->fetchAll(PDO::FETCH_OBJ);

    return $rows;
}

<强>的getMessages：

public function getMessages($locationId, $name) {
    if(!empty($name)) {

        $query = 'SELECT * FROM (SELECT * FROM sms WHERE location_id=:locationId ORDER BY id DESC LIMIT 5) AS SOURCE ORDER BY id ASC';
        $parameters = array(':locationId' => $locationId);

        $rows = $this->returnDataObject($query, $parameters);

        foreach($rows as $row) {
            $this->fetchData($row, $biggestId, $name);
        }

        $this->updateSessionKey($locationId, $name);
    }
}

正在进行PDO bindValue / BindParam

1 个答案: