２次元配列のソート

配列じゃなくてオブジェクトにする方法もあります。 <?php class person { public $id; public $name; public $age; function __construct ($id1, $name1, $age1) { $this->id = $id1; $this->name = $name1; $this->age = $age1; } } $array_person_object = array(); $array_person_object[] = new person("1", "た", "20"); $array_person_object[] = new person("2", "さ", "15"); $array_person_object[] = new person("3", "き", "30"); function name_s