// PHP - fusion de tableaux
$food = array_merge($fruits, $vegetables);
$food = [...$fruits, ...$vegetables]; // PHP 7.4+

// PHP - fusion d'objets/arrays associatifs
$userWithCity = array_merge($user, ['city' => 'Paris']);
$userWithCity = [...$user, 'city' => 'Paris']; // PHP 8.1+