5-4 php二維陣列

array(3) {
  [1]=>
  array(5) {
    [1]=>
    string(6) "完成"
    [2]=>
    string(12) "撰寫程式"
    [3]=>
    string(10) "2020/06/08"
    [4]=>
    string(3) "低"
    [5]=>
    string(9) "李大頭"
  }
  [2]=>
  array(5) {
    [1]=>
    string(9) "未完成"
    [2]=>
    string(6) "開會"
    [3]=>
    string(10) "2020/06/08"
    [4]=>
    string(3) "高"
    [5]=>
    string(26) "李大頭、主任、XX科"
  }
  [3]=>
  array(5) {
    [1]=>
    string(6) "完成"
    [2]=>
    string(12) "撰寫程式"
    [3]=>
    string(10) "2020/06/08"
    [4]=>
    string(3) "低"
    [5]=>
    string(9) "李大頭"
  }
}