title: edit docx file using phpword
body: <p>is it possible to edit existing docx file using phpword?</p>
  
  <p>i want to add footer text to my existing docx file. </p>
  
  <p>there are lot of examples but those examples are creating the doc file from scratch not editing the file
  can someone link to me an example? thank you</p>
  
  <p>just like this.</p>
  
  <pre><code>&lt;?php
  require_once 'PHPWord.php';
  // New Word Document
  $PHPWord = new PHPWord();
  // New portrait section
  $section = $PHPWord-&gt;createSection();
  // Add header
  $header = $section-&gt;createHeader();
  $table = $header-&gt;addTable();
  $table-&gt;addRow();
  $table-&gt;addCell(4500)-&gt;addText('This is the header.');
  $table-&gt;addCell(4500)-&gt;addImage('_earth.jpg', array('width'=&gt;50, 'height'=&gt;50, 'align'=&gt;'right'));
  // Add footer
  $footer = $section-&gt;createFooter();
  $footer-&gt;addPreserveText('Page {PAGE} of {NUMPAGES}.', array('align'=&gt;'center'));
  // Write some text
  $section-&gt;addTextBreak();
  $section-&gt;addText('Some text...');
  // Save File
  $objWriter = PHPWord_IOFactory::createWriter($PHPWord, 'Word2007');
  $objWriter-&gt;save('HeaderFooter.docx');
  ?&gt;
  </code></pre>