Get array using array function

i m using $headings[0][0] to get array any array function available to get that array or any solution.

   $headings=array[
  0 => array[
    0 => array[
      0 => "block1"
      1 => "row_from"
      2 => "seat_from"
      3 => "row_to"
      4 => "seat_to"
    ]
  ]
]

via Chebli Mohamed