From be428c73afbb87e9824705310da26cdf751934f0 Mon Sep 17 00:00:00 2001
From: Damian Luszczymak <info@icyapp.de>
Date: Sat, 12 Dec 2020 22:03:34 +0100
Subject: [PATCH] bugfix(zend) Deprecated: Array and string offset access
 syntax with curly braces is deprecated

---
 lib/Zend/Validate/Isbn.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/Zend/Validate/Isbn.php b/lib/Zend/Validate/Isbn.php
index d8cd964b255..9940e77ef2d 100644
--- a/lib/Zend/Validate/Isbn.php
+++ b/lib/Zend/Validate/Isbn.php
@@ -167,7 +167,7 @@ public function isValid($value)
                 $isbn10 = str_replace($this->_separator, '', $value);
                 $sum    = 0;
                 for ($i = 0; $i < 9; $i++) {
-                    $sum += (10 - $i) * $isbn10{$i};
+                    $sum += (10 - $i) * $isbn10[$i];
                 }
 
                 // checksum
@@ -185,9 +185,9 @@ public function isValid($value)
                 $sum    = 0;
                 for ($i = 0; $i < 12; $i++) {
                     if ($i % 2 == 0) {
-                        $sum += $isbn13{$i};
+                        $sum += $isbn13[$i];
                     } else {
-                        $sum += 3 * $isbn13{$i};
+                        $sum += 3 * $isbn13[$i];
                     }
                 }
                 // checksum