string csv to array

string_csv_to_array.php

<?php
/**
 * Receives CSV string and returns as an array.
 */
function csv_to_array($csv, $delimiter=',', $header_line=true) {
  // CSV from external sources may have Unix or DOS line endings. str_getcsv()
  // requires that the "delimiter" be one character only, so we don't want
  // to pass the DOS line ending \r\n to that function. So first we ensure
  // that we have Unix line endings only.
  $csv = str_replace("\r\n", "\n", $csv);

  // Read the CSV lines into a numerically indexed array. Use str_getcsv(),
  // rather than splitting on all linebreaks, as fields may themselves contain
  // linebreaks.
  $all_lines = str_getcsv($csv, "\n");
  if (!$all_lines) {
      return false;
  }

  $csv = array_map(
      function(&$line) use ($delimiter) {
          return str_getcsv($line, $delimiter);
      },
      $all_lines
  );

  if ($header_line) {
      // Use the first row's values as keys for all other rows.
      array_walk(
          $csv,
          function(&$a) use ($csv) {
              $a = array_combine($csv[0], $a);
          }
      );
      // Remove column header row.
      array_shift($csv);
  }

  return $csv;
}