import csv from local file and put values into an array, then loop on each line of the array

$filename = 'index.csv';
if(!file_exists($filename)) {
  echo "The file $filename does not exist";
} else {
  $file = fopen('index.csv', 'r');
  while(($csv = fgetcsv($file)) !== false):
    $line = implode(",", $csv);
    $line = str_replace('"', '', $line);
    $csv = explode(",", $line);
    // do somethings with $csv
  endwhile;
  fclose($file);
}