致命错误：未捕获异常“PDOException”并带有消息

Question

我正在尝试运行 MySQL PDO 查询。我不确定为什么会出现致命错误。我检查了其他帖子，但他们的答案似乎并没有解决我的问题。

该脚本与数据库的连接正常。用户名和密码是正确的，我已在下面的脚本中将其删除。

我的输出：

Connected to database
Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[28000] [1045] Access denied for user 'nobody'@'localhost' (using password: NO)' in /home/a/public_html/d/inc/header.php:34 Stack trace: #0 /home/a/public_html/d/inc/header.php(34): PDO->__construct('mysql:host=;dbn...', NULL, NULL) #1 /home/a/public_html/d/inc/header.php(43): testdb_connect() #2 /home/a/public_html/d/article.php(3): include('/home/a/p...') #3 {main} thrown in /home/a/public_html/d/inc/header.php on line 34

我的代码：

<?php
    /*** MySQL  hostname ***/
    $hostname = 'localhost';
    /*** MySQL  username ***/
    $username = 'removed';
    /*** MySQL  password ***/
    $password = 'removed';
    try {
        function testdb_connect(){
            $dbh = new PDO("mysql:host=$hostname;dbname=removed", $username, $password);
            return ($dbh);
        }
            echo 'Connected to database';
        }
    catch(PDOException $e) {
        echo $e->getMessage();
    }

    $dbh = testdb_connect();

    $id = $_GET[id];
    echo 'dfsdfs ' . $id;
    var_dump($dbh);
    $sql = "SELECT * FROM 'radiologyArticles' WHERE 'id' = :id";
    $stmt = $dbh->prepare($sql);
    $stmt->bindParam(':id', $id);
    $stmt->execute();
    while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {

?>

        <section>
            <header>
                <h2><?php echo $row['articleTitle']; ?></h2>
                <h3>A generic two column layout</h3>
            </header>
            <p>
                <?php echo $row['articleBody']; ?>
            </p>
        </section>

        <?php
    }
            // Close the PDO connection
            $link = null;
        ?>

Answer 1

/*** MySQL hostname ***/
$hostname = 'localhost';
/*** MySQL username ***/
$username = 'removed';
/*** MySQL password ***/
$password = 'removed';

function testdb_connect ($hostname, $username, $password){
    $dbh = new PDO("mysql:host=$hostname;dbname=removed", $username, $password);
    return $dbh;
}

try {
    $dbh = testdb_connect ($hostname, $username, $password);
    echo 'Connected to database';
} catch(PDOException $e) {
    echo $e->getMessage();
}