How can PHP developers optimize their code for performance?

PHP developers can optimize their code for performance by minimizing database queries, utilizing caching mechanisms, and optimizing loops and conditionals. One way to optimize performance is to use prepared statements instead of regular queries to prevent SQL injection attacks and improve database performance. 

// Using prepared statements to optimize database queries
$stmt = $pdo->prepare('SELECT * FROM users WHERE id = :id');
$stmt->execute(['id' => $user_id]);
$user = $stmt->fetch();

Keywords

caching opcode profiling database indexing code minification

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