php pluck的典型用例有哪些

从数组中提取指定键的值组成新的数组：

$data = [    ['id' => 1, 'name' => 'Alice'],    ['id' => 2, 'name' => 'Bob'],    ['id' => 3, 'name' => 'Charlie']];$names = array_column($data, 'name');print_r($names);

从对象数组中提取指定属性的值组成新的数组：

class User {    public $id;    public $name;    public function __construct($id, $name) {        $this->id = $id;        $this->name = $name;    }}$users = [    new User(1, 'Alice'),    new User(2, 'Bob'),    new User(3, 'Charlie')];$names = array_column($users, 'name');print_r($names);

从关联数组中提取指定键的值组成新的数组：

$data = [    'id' => 1,    'name' => 'Alice',    'age' => 25];$values = array_values($data);print_r($values);