What potential pitfalls should be avoided when using PHP to manipulate database data?

One potential pitfall to avoid when using PHP to manipulate database data is SQL injection attacks. To prevent this, always use prepared statements with parameterized queries instead of directly inserting user input into SQL queries. This helps to sanitize the input and prevent malicious SQL code from being executed. 

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

Keywords

SQL injection data validation prepared statements error handling database transactions

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