What are some common pitfalls for beginners when trying to implement SQL queries in PHP?

One common pitfall for beginners when implementing SQL queries in PHP is not properly sanitizing user input, which can lead to SQL injection attacks. To solve this issue, always use prepared statements with parameterized queries to prevent SQL injection vulnerabilities. 

// Example of 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 PDO prepared statements mysqli error handling

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