fix examples

Author: spipu

examples/example09.php

@@ -62,6 +62,7 @@
 
     try {
         $html2pdf = new Html2Pdf('P', 'A4', 'fr');
+        $html2pdf->getSecurityService()->addAllowedHost('html2pdf-dev.lxd');
         $html2pdf->writeHTML($content);
         $html2pdf->output('example09.pdf');
         exit;

src/Exception/ExceptionFormatter.php

@@ -121,7 +121,7 @@ protected function buildTextMessage(Html2PdfException $e, $data)
 
         if (!empty($data)) {
             foreach ($data as $key => $value) {
-                $this->message .= ' '.ucwords($key).': '.trim($value)."\n";
+                $this->message .= ' '.ucwords($key).': '.trim((string) $value)."\n";
             }
         }
     }
@@ -145,7 +145,7 @@ protected function buildHtmlMessage(Html2PdfException $e, $data)
 
         if (!empty($data)) {
             foreach ($data as $key => $value) {
-                $this->htmlMessage .= ' '.ucwords($key).': '.trim(htmlentities($value))."<br />\n";
+                $this->htmlMessage .= ' '.ucwords($key).': '.trim(htmlentities((string) $value))."<br />\n";
             }
         }
     }