php怎么訪問mysql的數組

$staff = array( array("name" => "張三", "number" => "101", "sex" => "男", "job" => "總經理", "mobile" => array("01234567890", "9876543210")), 
 array("name" => "王五", "number" => "102", "sex" => "男", "job" => "開發工程師"), 
 array("name" => "李六", "number" => "103", "sex" => "女", "job" => "產品經理"), 
);

// 寫入數據庫之前
$staff_serialize = serialize($staff);// 序列化成字符串
$staff_json = json_encode($staff); // JSON編碼數組成字符串

// 讀取數據庫后
$staff_restore = unserialize($staff_serialize); // 反序列化成數組
$staff_dejson = json_decode($staff_json, true); // JSON解碼成數組