Much has been said about 2D barcodes, and the discussion has focused on the format of the 2D barcode itself -- QR Code, Data Matrix, and so on. But equally important is the format of what the barcode itself encodes.

2D barcodes encode text, generally, but that text can represent many things. Commonly, 2D barcodes encode text that represents a URL, like "http://google.com/m". This is a special string of text since it is recognizable as a URL by readers, and therefore can be acted upon: the reader can open the URL in a browser.

2D barcodes can encode many types of actionable text. Text representing contact information, when recognized, could trigger a prompt to add the contact to an address book. But this only works when readers understand that text encodes contact information. For this, we need standards too.

There are some standards -- de facto and otherwise -- already in use. This wiki attempts to catalog some possible standards for encoding various types of information, and suggest a standard action associated to them. It is not necessarily complete and contributions are welcome.

The ZXing reader library supports all of the formats mentioned in this wiki and a bit more.

A QR Code is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-Wave in 1994. The "QR" is derived from "Quick Response", as the creator intended the code to allow its contents to be decoded at high speed. QR Codes are common in Japan where they are currently the most popular type of two dimensional codes.

Qr Code is type of Barcode that you use on your website. This type of barcode you can read by mobile phones like iphone or all with Android system (youtube link with example of use : http://www.youtube.com/watch?v=IphTJHiKGos&feature=related ). Inside you can insert some informaction like link or text and this message we read by your phone. Normaly you to create this you can use google chart but the syntax use terrible this class create link for you in easy way you pass only some information and you get corect link fot google chart

New demo page wad add : demo was created for .net but funzionality is the same

As return give you link or image html tag that you can use on your page.

-Useful for any PHP website
-Cross-browser compatible
-simple to use (2 line of code)
-detailed documentation included