PHP best practices: follow camel case naming convention. Use type hints. Keep functions short and concise. Avoid side effects. Use documentation comments. Design pattern: Singleton pattern: ensures a single instance. Factory pattern: Create objects. Observer pattern: subscribe to events. Adapter mode: Compatible interface. Agent mode: Provides an agent.
PHP Function Best Practices and Design Patterns
Best Practices
myFunctionName()
. function getSum(int $a, int $b): int {}
. Design pattern
Practical case
Single case mode
class Database { private static $instance; private function __construct() {} public static function getInstance(): Database { if (!isset(self::$instance)) { self::$instance = new Database(); } return self::$instance; } }
Factory mode
interface Vehicle { public function start(); public function stop(); } class Car implements Vehicle { public function start() { echo "Car started\n"; } public function stop() { echo "Car stopped\n"; } } class Truck implements Vehicle { public function start() { echo "Truck started\n"; } public function stop() { echo "Truck stopped\n"; } } class VehicleFactory { public static function createVehicle(string $type): Vehicle { switch ($type) { case 'car': return new Car(); case 'truck': return new Truck(); default: throw new InvalidArgumentException("Invalid vehicle type: $type"); } } } // Usage $car = VehicleFactory::createVehicle('car'); $car->start(); // Outputs "Car started"
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