PHPOffice / PhpSpreadsheet

                $i = false;

                foreach ($temp as &$value) {

                    //    Only count/replace in alternating array entries

                    if ($i = !$i) {

                        $value = preg_replace($from, $to, $value);

                        $value = self::translateSeparator($fromSeparator, $toSeparator, $value, $inBraces);

                    }

                }

                unset($value);

                //    Then rebuild the formula string

                unset($value);

                //    Then rebuild the formula string

                $formula = implode('"', $temp);

            } else {

                //    If there's no quoted strings, then we do a simple count/replace

                $formula = preg_replace($from, $to, $formula);

                $formula = self::translateSeparator($fromSeparator, $toSeparator, $formula, $inBraces);

            }

        }

        return $formula;