CSV to JSON PHP

csv-to-json.php

/*
File in mydata.csv is formatted as follow:
key1/key2,"value1"
key1/key2/key3,"value2"
key1/key2/key4,"value2"
*/
$file = fopen("mydata.csv", "r");
$data = fgetcsv($file);

$result = [];

var_dump($data);
echo('--------------------------------------');

while(($row = fgetcsv($file)) !== FALSE) {
  $hash = [];
  var_dump($row[0]);
  $result[] = convert_array_in_hash($row[1], explode("/", $row[0]), $hash);
}


echo('*****************************************');
var_dump($result);
var_dump(json_encode($result));

function convert_array_in_hash($value, $array_keys, &$hash, $previous_key = null) {
  $key = array_pop($array_keys);    
  if (count($array_keys) >= 1) {
      if($previous_key == null){
          $hash[$key] = $value;
      } else {
          $hash = array($key => $hash);
      }
      convert_array_in_hash($value, $array_keys, $hash, $key);
  } else {
      if($previous_key == null){
          $hash[] = $key;
      } else {
          $hash = array($key => $hash);
      }
  }
  //var_dump($hash);
  return $hash;
}