How can PHP beginners optimize their code for better performance?

PHP beginners can optimize their code for better performance by avoiding excessive database queries, using efficient data structures, and minimizing the use of loops. They can also enable caching mechanisms and utilize opcode caching to reduce the compilation time of PHP scripts. 

// Example of optimizing code by reducing database queries
// Instead of making multiple queries, fetch all necessary data in a single query

// Bad practice: Multiple queries
$user = getUserById(1);
$orders = getOrdersByUserId(1);

// Good practice: Single query
$userData = getUserDataWithOrders(1);
$user = $userData['user'];
$orders = $userData['orders'];

Keywords

PHP optimization performance caching profiling

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