Fix HTML parsing when style attribute is empty (#1295)

Author: lalop

src/PhpWord/Shared/Html.php

@@ -486,8 +486,9 @@ private static function parseListItem($node, $element, &$styles, $data)
     private static function parseStyle($attribute, $styles)
     {
         $properties = explode(';', trim($attribute->value, " \t\n\r\0\x0B;"));
+
         foreach ($properties as $property) {
-            list($cKey, $cValue) = explode(':', $property, 2);
+            list($cKey, $cValue) = array_pad(explode(':', $property, 2), 2, null);
             $cValue = trim($cValue);
             switch (trim($cKey)) {
                 case 'text-decoration':

tests/PhpWord/Shared/HtmlTest.php

@@ -418,4 +418,14 @@ public function testParseLink()
         $this->assertTrue($doc->elementExists('/w:document/w:body/w:p/w:hyperlink'));
         $this->assertEquals('link text', $doc->getElement('/w:document/w:body/w:p/w:hyperlink/w:r/w:t')->nodeValue);
     }
+
+    public function testParseMalformedStyleIsIgnored()
+    {
+        $phpWord = new \PhpOffice\PhpWord\PhpWord();
+        $section = $phpWord->addSection();
+        $html = '<p style="">text</p>';
+        Html::addHtml($section, $html);
+        $doc = TestHelperDOCX::getDocument($phpWord, 'Word2007');
+        $this->assertFalse($doc->elementExists('/w:document/w:body/w:p[1]/w:pPr/w:jc'));
+    }
 }