只計算在PHP中的多維數組的頂部單元格

Question

我有一個數組如下。

我想要的只是數組的頂部單元格;如在0,1,2,3,4和5.所以這個陣列我應該有一個計數6.

我該如何做到這一點？

我試圖

count(array)和sizeof(array)，但它提供了一個很大的數字。

Array 
(
    [0] => Array 
     (
      [0] => Array 
       (
        [2011-11-18 00:00:00] => C 
       ) 

      [1] => Array 
       (
        [2011-11-18 00:00:00] => I 
       ) 

      [2] => Array 
       (
        [2011-11-18 00:00:00] => S 
       ) 

     ) 

    [1] => Array 
     (
      [0] => Array 
       (
        [2011-11-22 00:00:00] => C 
       ) 

      [1] => Array 
       (
        [2011-11-22 00:00:00] => S 
       ) 

     ) 

    [2] => Array 
     (
      [0] => Array 
       (
        [2011-11-22 00:00:00] => C 
       ) 

      [1] => Array 
       (
        [2011-11-22 00:00:00] => S 
       ) 

     ) 

    [3] => Array 
     (
      [0] => Array 
       (
        [2011-11-22 00:00:00] => C 
       ) 

      [1] => Array 
       (
        [2011-11-22 00:00:00] => S 
       ) 

     ) 
    [4] => Array 
     (
      [0] => Array 
       (
        [2011-11-22 00:00:00] => C 
       ) 

      [1] => Array 
       (
        [2011-11-22 00:00:00] => S 
       ) 

     ) 

    [5] => Array 
     (
      [0] => Array 
       (
        [2011-11-22 00:00:00] => C 
       ) 

      [1] => Array 
       (
        [2011-11-22 00:00:00] => S 
       ) 

     ) 
) 

Answer 1

嘗試：

count(array_column($array , 0)); 

您可以閱讀進一步here

這是> = PHP可用5