write-json.php

<?php
  /**
   * Write JSON encoded data to disk.
   */
  protected function writeJson($filename, $data) {
    if (!file_exists($this->getJsonDirectory())) {
      if (!drush_mkdir($this->getJsonDirectory())) {
        return drush_set_error('NO_JSON_DIR', dt('Unable to create JSON directory at !file', array('!file' => $this->getJsonDirectory())));
      }
    }
    // Remove headers.
    array_shift($data);
    $json_filename = str_replace('xml', 'json', $filename);
    $file = $this->getJsonDirectory() . '/' . $json_filename;
    if (file_exists($file)) {
      unlink($file);
    }
    $json_data = json_encode($data);
    if (!file_put_contents($file, $json_data)) {
      return drush_set_error(dt('Failed to write JSON for file !file', array('!file' => $json_filename)));
    }
    drush_log(dt('Wrote JSON to file !file', array('!file' => $file)), 'ok');
    return TRUE;
  }

fdg g