haphpiness

Trailing Commas Everywhere

PHP progressively allowed trailing commas in more places: arrays (always), function calls (7.3), parameter lists (8.0), and closure use lists (8.0). Clean diffs, easy reordering, no syntax errors when adding items.

// Arrays (always supported — PHP was ahead of JS here!)
$config = [
    'debug' => true,
    'cache' => false,
    'log_level' => 'info',   // ← trailing comma, always worked
];

// Function/method calls (PHP 7.3)
$result = sprintf(
    '%s has %d items worth $%.2f',
    $name,
    $count,
    $total,  // ← no more removing this comma when adding a line below
);

// Function/method declarations (PHP 8.0)
function createUser(
    string $name,
    string $email,
    Role $role = Role::User,  // ← add new params without touching this line
) {
    // ...
}

// Closure use lists (PHP 8.0)
$fn = function () use (
    $config,
    $logger,
    $cache,  // ← consistent everywhere
) {
    // ...
};

Trailing commas mean cleaner git diffs: adding a new item only shows one changed line, not two (the new line plus the comma added to the previous line). They also make reordering lines trivial — no comma juggling.