parse-ph-province.php

<?php

  $json = file_get_contents('json.txt');;

  $array = json_decode($json, true);

  $newArray = [];

  foreach ($array as $value)
  {
      $value['provDesc'] = ucwords(strtolower($value['provDesc']));
      $newArray[] = $value;
  }

  // echo json_encode($newArray);
file_put_contents('province.txt', var_export($newArray, true));