csvデータの読み込み

$csv = array();
$file_name = "data.csv";

$fp = fopen($file_name,"r");
while($ret_csv = fgetcsv($fp, 256)) {

  for($i = 0; $i < count($ret_csv); ++$i ){

  }
  $csv[] = $ret_csv;
}


fclose($fp);