write to log - wordpress debug log

functions.php

if (!function_exists('write_log')) {
    function write_log ( $log )  {
        if ( true === WP_DEBUG ) {
            if ( is_array( $log ) || is_object( $log ) ) {
                error_log( print_r( $log, true ) );
            } else {
                error_log( $log );
            }
        }
    }
}

function reorderWordpressDatabase($databaseResults, $allowedKeys) {
    // where order_item_id == too many problems TODO: ?

      $filtered = array_filter($databaseResults, function($row) use ($allowedKeys) {
        $filter = [];
        foreach ($allowedKeys as $value) {
          if(in_array($value, $row)) {
            $filter[] = $row;
          }
        }
        return $filter;
      });
      $reorderedFilteredData = array_column($filtered, 'meta_value', 'meta_key');
      return $reorderedFilteredData;
  }