From 8d89554d8432c6802f65f932eee3b20773d42eab Mon Sep 17 00:00:00 2001
From: Gislain Harding <ghd@crediwire.com>
Date: Mon, 7 Sep 2020 10:10:13 +0200
Subject: [PATCH] Set formula attribute in the Xlsx reader

---
 src/PhpSpreadsheet/Reader/Xlsx.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index 73f91852..8d38fa3e 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -717,6 +717,10 @@ class Xlsx extends BaseReader
                                                 } else {
                                                     // Formula
                                                     $this->castToFormula($c, $r, $cellDataType, $value, $calculatedValue, $sharedFormulas, 'castToString');
+                                                    if (isset($c->f['t'])) {
+                                                        $att = $c->f['t'];
+                                                        $docSheet->getCell($r)->setFormulaAttributes(['t' => (string)$att]);
+                                                    }
                                                 }
 
                                                 break;