Erro PDO致命错误：未捕获异常＆＃39; PDOException＆＃39;

Question

请帮助我，我的剧本中有错误。

致命错误：未捕获的异常＆＃39; PDOException＆＃39;消息＆＃39; SQLSTATE [42000]：语法错误或访问冲突：1065查询为空＆＃39;在C：\ xampp \ htdocs \ File \ project \ blog \ class \ Blog.php：36堆栈跟踪：＃0 C：\ xampp \ htdocs \ File \ project \ blog \ class \ Blog.php（36）：PDOStatement- ＆gt;执行（）＃1 C：\ xampp \ htdocs \ File \ project \ blog \ index.php（32）：Blog-＆gt; dataview（NULL）＃2 {main}在C：\ xampp \ htdocs \ File中抛出36号线上的\ project \ blog \ class \ Blog.php

    public function dataview($query) 
{
    $stmt = $this->connect->prepare($query);
    $stmt->execute();
    return true;


    if($stmt->rowCount() > 0) {
        while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
            ?>

                <tr>
                    <td><?php print($row['id']); ?></td>
                    <td><?php print($row['judul']); ?></td>
                    <td><?php print($row['kategori']); ?></td>
                    <td><?php print($row['isi']); ?></td>
                    <td><a href="#"></a></td>
                    <td><a href="#"></a></td>
                </tr>

            <?php
        }
    } else {
        ?>

            <tr>
                <td>Not Found</td>
            </tr>

        <?php
    }
}