Merge branch 'release/4.0.1'

Author: ma4nn

README.md

@@ -1,4 +1,4 @@
-# vianetz Pdf Library
+# vianetz PDF Library
 
 This library offers an easy-to-use API for PDF generation and merging.  
 Internally it uses the DomPDF library for PDF generation and TCPDF for merging.

composer.json

@@ -1,6 +1,6 @@
 {
   "name": "vianetz/pdf-generator",
-  "description": "The vianetz PDF library that generates PDF documents.",
+  "description": "A library that supports method for generating PDF documents based on DomPdf and FPDI.",
   "type": "library",
   "keywords": [
     "vianetz",

src/Model/Generator/Dompdf.php

@@ -87,15 +87,27 @@ private function getDompdfOptions(): array
         ];
     }
 
+    /** @see https://github.com/dompdf/dompdf/issues/1636#issuecomment-490372233 */
     private function injectPageCount(): void
     {
+        /** @var \Dompdf\Adapter\CPDF $canvas */
         $canvas = $this->domPdf->getCanvas();
-        $pdf = $canvas->get_cpdf(); // @phpstan-ignore-line
+
+        $search = [self::TOTAL_PAGE_COUNT_PLACEHOLDER, self::insertNullByteBeforeEachCharacter(self::TOTAL_PAGE_COUNT_PLACEHOLDER)];
+        $replace = [(string)$canvas->get_page_count(), self::insertNullByteBeforeEachCharacter((string)$canvas->get_page_count())];
+
+        $pdf = $canvas->get_cpdf();
 
         foreach ($pdf->objects as &$o) {
             if ($o['t'] === 'contents') {
-                $o['c'] = str_replace(self::TOTAL_PAGE_COUNT_PLACEHOLDER, (string)$canvas->get_page_count(), $o['c']);
+                $o['c'] = str_replace($search, $replace, $o['c']);
             }
         }
     }
+
+    /** @see https://gist.github.com/enumag/f670865b70d11e0b8156b1e92acc3c92 */
+    private static function insertNullByteBeforeEachCharacter(string $string): string
+    {
+        return "\u{0000}" . substr(chunk_split($string, 1, "\u{0000}"), 0, -1);
+    }
 }