What are some common pitfalls when dealing with PHP links that include parameters like modules.php?name=News&new_topic=2?

Common pitfalls when dealing with PHP links that include parameters like modules.php?name=News&new_topic=2 include not properly sanitizing user input, leaving the application vulnerable to SQL injection attacks. To solve this issue, always sanitize and validate user input before using it in SQL queries to prevent malicious code execution. 

// Sanitize and validate user input before using it in SQL queries
$name = filter_var($_GET['name'], FILTER_SANITIZE_STRING);
$new_topic = filter_var($_GET['new_topic'], FILTER_VALIDATE_INT);

// Use prepared statements to prevent SQL injection attacks
$stmt = $pdo->prepare("SELECT * FROM news WHERE name = :name AND new_topic = :new_topic");
$stmt->bindParam(':name', $name, PDO::PARAM_STR);
$stmt->bindParam(':new_topic', $new_topic, PDO::PARAM_INT);
$stmt->execute();

Keywords

PHP URL parameters modules.php query string sanitization

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