What are some best practices for securely processing and storing data from external sources in PHP?

When processing and storing data from external sources in PHP, it is essential to follow best practices to ensure the security of the application. One way to do this is by using parameterized queries to prevent SQL injection attacks. Additionally, data should be validated and sanitized before storing it in the database to prevent cross-site scripting attacks. Encrypting sensitive data before storing it can also add an extra layer of security. 

// Example of using parameterized queries to securely process and store data from external sources in PHP

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

// Prepare a SQL statement with parameters
$stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)");

// Bind the parameters with the values
$stmt->bindParam(':username', $_POST['username']);
$stmt->bindParam(':email', $_POST['email']);

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

Keywords

SQL injection prepared statements encryption hashing input validation

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