What are the best practices for handling form submissions in PHP to avoid NULL values being saved in the database?

To avoid saving NULL values in the database when handling form submissions in PHP, it is important to validate the input data before inserting it into the database. This can be done by checking if the submitted form fields are not empty or NULL before processing the data. Additionally, using prepared statements with parameterized queries can help prevent SQL injection attacks and ensure that only valid data is saved in the database. 

// Assuming form data is submitted via POST method
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate form fields to avoid NULL values
    $name = !empty($_POST['name']) ? $_POST['name'] : '';
    $email = !empty($_POST['email']) ? $_POST['email'] : '';
    
    // Insert validated data into the database using prepared statements
    $stmt = $pdo->prepare("INSERT INTO users (name, email) VALUES (:name, :email)");
    $stmt->bindParam(':name', $name);
    $stmt->bindParam(':email', $email);
    $stmt->execute();
}

Keywords

PHP form submissions NULL values database validation

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