In the provided PHP script, what are some best practices for handling database queries and object manipulation to avoid errors like the one mentioned in the thread?

Issue: The error mentioned in the thread could be due to improper error handling and object manipulation in the database queries. To avoid such errors, it is recommended to use try-catch blocks for handling exceptions and ensure proper instantiation of objects before using them in queries. 

try {
    $db = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");
    $stmt = $db->prepare("SELECT * FROM users WHERE id = :id");
    $stmt->bindParam(':id', $userId, PDO::PARAM_INT);
    $stmt->execute();
    
    $user = $stmt->fetch(PDO::FETCH_ASSOC);
    
    if($user) {
        // Handle user data
    } else {
        // Handle case when user is not found
    }
} catch(PDOException $e) {
    echo "Error: " . $e->getMessage();
}

Keywords

SQL injection PDO prepared statements error handling object-oriented programming

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