Seo Master present to you:
By Hiroyuki Komatsu, Google Chart API team
You can easily render 2D bar codes, known as
QR Codes, with the
Google Chart API, along with pie charts and bar graphs. If you haven't seen a QR Code before, you are looking at one on the right hand side (To see more, do an image search for "
QR Code".)
QR Codes are a popular type of two-dimensional barcode. You can encode URLs, contact information, etc. into a black-and-white image like the one on the right. A QR-Code-enabled device can later scan the image and read back the original text. Learn more about QR Codes from
Google Print Ads. If you don't have a reader Google also offers a QR Code decoder library:
Zebra Crossing (ZXing).
This is how you can creating these with the Google Chart API:
Simply, there is a new chart type,
qr
, with attributes to tell the service what to produce:
cht=qr
chl=<text>
choe=<output>
<text> is text for the QR code. This must be url-encoded in UTF8. Note the space between
hello
and
world
is written as
%20
in the following example.
<output> optionally specifies how the text is encoded into bytes in the QR Code. If this is not specified the default of
UTF-8
is used. Available options are:
Shift_JIS
,
UTF-8
, or
ISO-8859-1
.
For the details, please
read the full documentation.2013, By: Seo Master