How can SQL injection vulnerabilities be addressed when retrieving data from a database in PHP, as seen in the provided code snippet?

SQL injection vulnerabilities can be addressed by using prepared statements or parameterized queries in PHP when retrieving data from a database. This approach helps prevent malicious SQL injection attacks by separating SQL code from user input data. 

// Using prepared statements to prevent SQL injection
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username);
$stmt->execute();
$results = $stmt->fetchAll();

Keywords

SQL injection database retrieval prepared statements parameterized queries PHP security

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