php qrencode is the wrapper of libqrencode to generate qr code.

only 2 function to generate qr code.

<code>
$qr = qr_encode ('test for qrcode');
if (is_resource ($qr))
    qr_save ($qr, '1.png');
</code>

or you can output direct to stdout.

<code>
$qr = qr_encode ('test for qrcode');
if (is_resource ($qr))
{
    header ("Content-type: image/PNG");
    qr_save ($qr);
}
</code>

resource = qr_encode (string $text, [ int $version, int $mode, int $casesensitive]);

bool = qr_save (resource $qr, [ string $filename] );