100% Open Source, LGPL Licensed<\/li>\n<\/ul>\nPHP QR code library makes it very easy to generate QR codes in PHP. After downloading the library from the link given above you should extract it (since it’s in a zip ) to a suitable place in your hard drive ( most likely where your PHP scripts are stored). Your file path would look something like what is below.<\/p>\n
\\var\\www\\phpqrcode\r\n\\var\\www\\your_app\r\n<\/pre>\nPHP QR code library doesn’t need any external dependency except GD2. If you encounter\u00a0any problems while using this library or you just want to check before hand, you should create a script with the phpinfo()<\/code> keyword, to get all the details about your PHP installation.<\/p>\n<?php\r\nphpinfo();\r\n\r\n>\r\n\r\n\r\n<\/pre>\nindex.php<\/em><\/span><\/p>\n\r\n\r\n<?php\r\ninclude \"phpqrcode\/qrlib.php\";\r\n\/\/ create a QR Code with this text and display it\r\nQRcode::png(\"MY FIRST PHP QR CODE GENERATOR EXAMPLE\") ;\r\n?>\r\n<\/pre>\nThe first script above, is very simple. It generates a QR code and displays it in the browser. We only supply a string as an argument to the method QRcode::png<\/code> . The string supplied is the information our qr code would hold or store. It’s so easy.\u00a0Withonly \u00a0just two lines of code we have \u00a0already created a working example.
\nLets look at another example:<\/p>\nindex2.php<\/em><\/span><\/p>\n<?php\r\ninclude \"phpqrcode\/qrlib.php\";\r\nQRcode::png (\"http:www.webcodegeeks.com \" , \"test.png \", \"L\", 5, 5) ;\r\n\r\n?>\r\n\r\n\r\n<\/pre>\nThe second example might seem rather complex- but it is not really. The first parameter supplied to the method ( http:www.webcodegeeks.com ) represents the information to be encoded, the second parameter, has a default value of false meaning the image is displayed by the browser. Here we set the value to a valid file name ( test.png), this tells the QR code library to create a file containing the QR code.<\/p>\n
The third parameter is the level of error correction for the generated barcode, passed as a single letter string. This specifies how much of the data\u2019s codewords (8-bits per codeword) can be restored for a distorted or damaged QR Code image using the Reed-Solomon error correction algorithm. The higher the correction level, the less the data capacity of the barcode can be for a given dimension.<\/p>\n
The fourth parameter supplied, defines the size of each of the barcode squares and it is in pixels. In our example we specified five parameters\u00a0so we have a 5 by 5 barcode square.
\nThe fifth parameter defines the white margin boundary around the barcode. To preview\u00a0the QR code we just created is simple. Lets do that in our next example.<\/p>\n
index2.php<\/em><\/span><\/p>\n>!DOCTYPE html< \r\n>html lang=en<\r\n\t>head<\r\n\t>style<\r\n\t>\/style<\r\n\r\n\t\t>meta charset=\"utf-8\" \/<\r\n\t\t>meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, target-densitydpi=device-dpi\"\/<\r\n\r\n\t\t>title<\r\nPreviewing The QR Code Image\r\n\r\n>\/title<\r\n\t\t\r\n\t\t>\/head<\r\n\t>body<\r\n\t>img src=\"test.png\"<\r\n\t>\/body<\r\n\t>\/html<\r\n<\/pre>\nQR code is commonly used in advertising, packaging, commercial tracking, entertaining, transport ticketing, product marketing and in-store product labeling. Besides, it can also be applied to store personal information by government. Moreover, it may appear in magazines, on signs, buses, business cards, or almost any object that\u00a0users might need information.<\/p>\n
2. Summary<\/h2>\n
In this example we learnt about QR codes, what they are and their uses. We learnt how to create QR codes in PHP, through the use of QR code library.<\/p>\n