What are the best practices for securely passing and handling data between PHP files, considering potential vulnerabilities like PHP Object injection?

To securely pass and handle data between PHP files, it is important to sanitize and validate user input to prevent vulnerabilities like PHP Object injection. One way to do this is by using functions like serialize() and unserialize() with caution, as they can be exploited by injecting malicious objects into the code. It is also recommended to use prepared statements when interacting with databases to prevent SQL injection attacks. 

// Example of securely passing and handling data between PHP files
// Sanitize and validate user input before processing
$input_data = filter_input(INPUT_POST, 'data', FILTER_SANITIZE_STRING);

// Prevent PHP Object injection by avoiding using serialize() and unserialize() on user input
// Instead, use JSON encoding for safe data transfer
$encoded_data = json_encode($input_data);

// When interacting with databases, use prepared statements to prevent SQL injection attacks
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $input_data);
$stmt->execute();

Keywords

PHP data handling security PHP Object injection vulnerabilities

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