You can provide data in GET parameter: <a href="?data=like_that&level=L&size=1">like that</a><hr/><br />
<b>Warning</b>:  imagepng() [<a href='function.imagepng'>function.imagepng</a>]: Unable to open 'D:\WWWAPI\qrcode\temp\test.png' for writing: Permission denied in <b>D:\WWWAPI\qrcode\qrimage.php</b> on line <b>43</b><br />