In what ways can PHP developers optimize their code to prevent common errors and improve the overall performance of a web application that interacts with a database?

One way PHP developers can optimize their code and prevent common errors is by using prepared statements to prevent SQL injection attacks and improve database performance. Prepared statements separate SQL logic from data input, reducing the risk of malicious code injection and improving query execution efficiency. 

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

Keywords

SQL injection prepared statements indexing caching error handling

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