Functions in PHP

// Basic function
function greet($name) {
    return "Hello, $name!";
}

// Type hints and return types
function add(int $a, int $b): int {
    return $a + $b;
}

// Default parameters
function connect($host = 'localhost', $port = 3306) {
    // connection logic
}

// Variadic functions
function sum(...$numbers): float {
    return array_sum($numbers);
}

// Named arguments (PHP 8+)
connect(port: 8080, host: 'example.com');