What security measures should be implemented to prevent SQL injection in PHP scripts like the one mentioned in the forum thread?

To prevent SQL injection in PHP scripts, it is crucial to use parameterized queries or prepared statements when interacting with a database. This helps to separate SQL code from user input, making it impossible for malicious input to alter the SQL query structure. Additionally, input validation and sanitization should be performed to ensure that only expected data is passed to the database. 

// Example of using prepared statements to prevent SQL injection

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

// Prepare a SQL statement with a placeholder for user input
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");

// Bind the user input to the placeholder
$stmt->bindParam(':username', $_POST['username']);

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

// Fetch the results
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);

// Use the results as needed
foreach ($results as $row) {
    echo $row['username'] . "<br>";
}

Keywords

SQL injection PHP scripts security measures prevention forum thread

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