From fd71d706b7ba5125096ceb7c2db16bcaf44bf3d2 Mon Sep 17 00:00:00 2001
From: Marvin Herbold <521887+mherbold@users.noreply.github.com>
Date: Thu, 6 Jun 2024 09:59:32 -0700
Subject: [PATCH] Update Calculation.php

---
 Classes/PHPExcel/Calculation.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Classes/PHPExcel/Calculation.php b/Classes/PHPExcel/Calculation.php
index 663b947eb..b90a23133 100644
--- a/Classes/PHPExcel/Calculation.php
+++ b/Classes/PHPExcel/Calculation.php
@@ -2669,11 +2669,11 @@ public function parseFormula($formula)
         //    Basic validation that this is indeed a formula
         //    We return an empty array if not
         $formula = trim($formula);
-        if ((!isset($formula{0})) || ($formula{0} != '=')) {
+        if ((!isset($formula[0])) || ($formula[0] != '=')) {
             return array();
         }
         $formula = ltrim(substr($formula, 1));
-        if (!isset($formula{0})) {
+        if (!isset($formula[0])) {
             return array();
         }