No one knows me when I wrote a QR code two years ago. Later, there were more apps scanning QR codes on mobile phones, which changed the times. Thanks to smartphones and. The QR code is a two-dimensional bar code... SyntaxHighlighter. all (); Information & nb I did not know when I wrote the QR code two years ago. Later, there were more apps scanning QR codes on mobile phones, which changed the times.
Thanks to smartphones and.
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A qr code is a two-dimensional barcode. you can compile the URL, text, photos, and other information into a square-shaped barcode pattern using the corresponding encoding algorithm, mobile phone users can re-decode the related information and view the content through cameras and decoding software.
The two-dimensional bar code (dimen1_bar code) records the data symbol information by using a specific ry that is distributed on a plane (two-dimensional direction) in a regular manner; in terms of code compilation, the concept of "0" and "1" bit streams that constitute the computer's internal logic is cleverly used, A number of Ry corresponding to the binary are used to represent the numerical value of the text. The image input device or the photoelectric scanning device can automatically read and read the text to realize automatic information processing: it has some commonalities of bar code technology: each code system has its specific character set, each character occupies a certain width, and has a certain verification function. At the same time, it also has the ability to automatically identify different rows of information, and to handle graphics rotation changes and other features. In many types of two-dimensional bar codes, common Code systems include Data Matrix, Maxi Code, Aztec, QR Code, QR Code, Vericode, limit 417, Ultracode, Code 49, and Code 16 K, the QR code was invented by Denso-Wave in Japan in 1994. QR code comes from the abbreviation "Quick Response", that is, the meaning of rapid Response. it is derived from the inventor's hope that the QR code can quickly decode its content. QR codes are most common in Japan and South Korea, and are currently the most popular two-dimensional space bar codes in Japan.
Add logo in the middle of the QR image
Reference: QR
Http://phpqrcode.sourceforge.net/
Php QR Code usage introduction
Http://www.2cto.com/kf/201212/178526.html
Https://developers.google.com/chart/infographics/docs/qr_codes? Hl = zh-CN
Http://ishare.iask.sina.com.cn/download/explain.php? Fileid = 23514545 & page = 2
You can use the following methods to generate a QR code in php:
Http://blog.csdn.net/shojecom/article/details/8158571
Http://www.qrhacker.com/
Http://www.shadowdev.com/services/qr/
