init commit

api/app/Utils/Exports/PhpMerge.php

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+<?php
+
+namespace App\Utils\Exports;
+
+use setasign\Fpdi\Fpdi;
+use setasign\Fpdi\PdfParser\StreamReader;
+
+class PhpMerge
+{
+    public static function mergePdfDocuments($documentTitle, $pdfContents)
+    {
+        $pdf = new Fpdi();
+
+        foreach ($pdfContents as $pdfContent) {
+
+            $streamReader = StreamReader::createByString($pdfContent['data']);
+            $pageCount = $pdf->setSourceFile($streamReader);
+
+            for ($pageNo = 1; $pageNo <= $pageCount; $pageNo++) {
+                $templateId = $pdf->importPage($pageNo);
+                $pdf->AddPage($pdfContent['orientation'], 'A4');
+                $pdf->useTemplate($templateId);
+            }
+        }
+
+        return response($pdf->Output($documentTitle . '.pdf', 'S'))
+            ->header('Content-Type', 'application/pdf')
+            ->header('Content-Disposition', 'inline; filename="' . $documentTitle . '.pdf"')
+            ->header('Cache-Control', 'no-cache, no-store, must-revalidate')
+            ->header('Pragma', 'no-cache')
+            ->header('Expires', '0');
+    }
+}