Convert CSV file in array

csv_to_array.php

<?php
/**
 * Convert CSV file in Array
 *
 * @param string $file_csv CSV file path
 *
 * @return array|string
 */
function csv_to_array(string $file_csv){
  if(!file_exists($file_csv)):
    return 'File not found...';
  endif;
  if(pathinfo($file_csv)['extension'] !== 'csv' && mime_content_type($file_csv) !== 'text/plain'):
    return 'File type not allowed, send a CSV file...';
  endif;

  return array_map('str_getcsv', file($file_csv));
}