title: phpqrcode library return image as a string
body: <p><a href="http://sourceforge.net/projects/phpqrcode/" rel="noreferrer">http://sourceforge.net/projects/phpqrcode/</a>, is a great library but i can't find <strong>how to return the png image as a string</strong>, the basic examples are</p>
  
  <pre><code>QRcode::png('code data text', 'filename.png'); // creates file 
  QRcode::png('some othertext 1234'); // creates code image and outputs it directly into browser
  </code></pre>
  
  <p>i checked the documentation and nothing, help! :B</p>