title: WKHTMLtoPDF header file content not displayed in PDF
body: <p>I'm trying to hide the header page number on the first page using this example I found <a href="https://stackoverflow.com/a/11950452/1148107">here</a>.  Which only works if I use it with footer-html and doesn't show/hide anything if I use it with header-html.  Originally I was trying to augment this <a href="http://biostall.com/wkhtmltopdf-add-header-footer-to-only-first-last-page" rel="noreferrer">solution</a> which also worked using footer-html, but since I couldn't get it to work in the header I kept on searching.  I've tried it with and without 'header-center' => '[[page]]' in case using this with header-html caused conflicts.  Anyone been able to get this to work in the headers recently?  I'm using PHPWKHTMLtoPDF wrapper version 1.2.6-dev if that helps with a up to date version of WKHTMLtoPDF, since the newest version of PHPWKHTMLtoPDF uses namespaces and we're using CodeIgniter 2.x-dev, which doesn't support them (or play well can't remember).</p>
  
  <pre><code>    // Create document PDF
      $pdf = new $this-&gt;wkhtmltopdf;
  
      // Locate WkHtmlToPdf executable for Windows
      if( $pdf-&gt;getIsWindows() ) 
      {
          $pdf-&gt;setOptions( array( 'binPath' =&gt; 'C:\Program Files\wkhtmltopdf\bin\wkhtmltopdf.exe', 
                                   'no-outline',
                                   'encoding' =&gt; 'UTF-8',
                                   'margin-top'    =&gt; 30,
                                   'margin-right'  =&gt; 20,
                                   'margin-bottom' =&gt; 30,
                                   'margin-left'   =&gt; 20,
  
                                   // Default page options
                                   'disable-smart-shrinking',
                                   'user-style-sheet' =&gt; 'pdf.css',
                                   'header-html' =&gt; dirname(__FILE__) . '\..\views\wkhtmltopdf\header.html'
          ) );
      }
  
      // Generate document fields
      $docInputs = $this-&gt;generate_inputs( $inputs, json_decode( $this-&gt;load-&gt;file( APPPATH . '/mapping/' . $document['mapping'], TRUE ), TRUE ) );
  
      // Merge document fields into HTML exported Word files
      $docHTML = $this-&gt;parser-&gt;parse( 'docs/' . $document['html'], $docInputs, TRUE );
  
      // Add HTML as page, along with option for page header
      $pdf-&gt;addPage( $docHTML, array( 'header-center' =&gt; '[[page]]',
                                      'header-spacing' =&gt; '10',
                                      'header-font-name' =&gt; 'Times New Roman'
      ) ); 
  </code></pre>