How can PHP code be optimized for readability and efficiency when working with arrays and database results?

To optimize PHP code for readability and efficiency when working with arrays and database results, use meaningful variable names, comments to explain complex logic, and break down complex operations into smaller, reusable functions. Additionally, use built-in PHP functions like array_map, array_filter, and array_reduce to manipulate arrays efficiently, and use prepared statements when querying a database to prevent SQL injection attacks. 

// Example of optimizing PHP code for readability and efficiency when working with arrays and database results

// Using meaningful variable names and comments
$query = "SELECT * FROM users WHERE age > 18"; // Query to fetch users older than 18
$users = $db->query($query)->fetchAll(); // Fetch all users matching the query

// Breaking down complex operations into smaller functions
function filterUsers($user) {
    return $user['age'] > 18;
}

$filteredUsers = array_filter($users, 'filterUsers'); // Filter users older than 18

// Using prepared statements to prevent SQL injection
$stmt = $db->prepare("SELECT * FROM users WHERE age > ?");
$stmt->execute([18]);
$preparedUsers = $stmt->fetchAll(); // Fetch all users older than 18

Keywords

PHP arrays database results optimization efficiency

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