How can context switching between SQL and HTML be managed effectively to prevent vulnerabilities like SQL injection and cross-site scripting?

To effectively manage context switching between SQL and HTML to prevent vulnerabilities like SQL injection and cross-site scripting, it is important to use parameterized queries for SQL statements and properly escape user input when outputting data in HTML. 

// Example of using parameterized queries to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $username);
$stmt->execute();

// Example of escaping user input when outputting data in HTML
echo htmlspecialchars($userInput, ENT_QUOTES, 'UTF-8');

Keywords

PHP SQL injection cross-site scripting context switching security

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