Change order of files inside Word file to be compatible with common mimetype detection

Author: gamerlv

src/PhpWord/Writer/Word2007.php

@@ -52,14 +52,15 @@ public function __construct(?PhpWord $phpWord = null)
         $this->setPhpWord($phpWord);
 
         // Create parts
+        // The first four files need to be in this order for Mimetype detection to work
         $this->parts = [
             'ContentTypes' => '[Content_Types].xml',
             'Rels' => '_rels/.rels',
+            'RelsDocument' => 'word/_rels/document.xml.rels',
+            'Document' => 'word/document.xml',
             'DocPropsApp' => 'docProps/app.xml',
             'DocPropsCore' => 'docProps/core.xml',
             'DocPropsCustom' => 'docProps/custom.xml',
-            'RelsDocument' => 'word/_rels/document.xml.rels',
-            'Document' => 'word/document.xml',
             'Comments' => 'word/comments.xml',
             'Styles' => 'word/styles.xml',
             'Numbering' => 'word/numbering.xml',

tests/PhpWordTests/Writer/Word2007Test.php

@@ -17,6 +17,7 @@
 
 namespace PhpOffice\PhpWordTests\Writer;
 
+use finfo;
 use PhpOffice\PhpWord\PhpWord;
 use PhpOffice\PhpWord\SimpleType\Jc;
 use PhpOffice\PhpWord\Writer\Word2007;
@@ -192,4 +193,25 @@ public function testSetUseDiskCachingException(): void
         $object = new Word2007();
         $object->setUseDiskCaching(true, $dir);
     }
+
+    /**
+     * File is detected as Word 2007.
+     */
+    public function testMime(): void
+    {
+        $phpWord = new PhpWord();
+        $section = $phpWord->addSection();
+        $section->addText('Test 1');
+
+        $writer = new Word2007($phpWord);
+        $file = __DIR__ . '/../_files/temp.docx';
+        $writer->save($file);
+
+        $finfo = new finfo(FILEINFO_MIME_TYPE);
+        $mime = $finfo->file($file);
+
+        self::assertEquals('application/vnd.openxmlformats-officedocument.wordprocessingml.document', $mime);
+
+        unlink($file);
+    }
 }