What security measures should be implemented when building a form to update values in a MySQL database using PHP?

When building a form to update values in a MySQL database using PHP, it is essential to implement security measures to prevent SQL injection attacks. One way to do this is by using prepared statements with parameterized queries in PDO (PHP Data Objects) to sanitize user input and prevent malicious code from being executed. 

// Establish a connection to the MySQL database using PDO
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare a SQL statement with placeholders for user input
$stmt = $pdo->prepare("UPDATE mytable SET column1 = :value1 WHERE id = :id");

// Bind the parameters with user input
$stmt->bindParam(':value1', $_POST['value1']);
$stmt->bindParam(':id', $_POST['id']);

// Execute the prepared statement
$stmt->execute();

Keywords

SQL injection prepared statements PDO input validation CSRF protection

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