title: fpdf size of text before print
body: <p>Hello I'm using the FPDF and I need help.
  I need to print news at the bottom of an invoice, the problem is, I need to know first the size of the news (text) (because people can choose which news will apear in the invoice) and then put the news onto the invoice, but close to the bottom/footer...</p>
  
  <p>My idea is to get the size of the text and save in $theSizeOfNew, then use:</p>
  
  <pre><code>//move pointer to the bottom of the page 
  $this-&gt;SetY(-$theSizeOfNew);
  </code></pre>
  
  <p>and then print the news.</p>
  
  <p>How can I get the size of the news before print? </p>