What is QR Code?
A QR code (Quick Response code) is a type of barcode that is readable by dedicated QR readers, iPhone, Android and smartphones. The barcode using encoded information like numbers, letters, and Kanji characters. QR Code is an 2D Code and in different sizes like 21×21 is version 1 and 177×177 is version 40.

The QR code consists of black modules arranged in a square pattern on a white background. When you scan a QR code with the device, the appropriate URL or the contact information will open.

The QR Code format was created in 1994 by Japanese company Denso-Wave.

Working of QR Code:
You can download and install an application on your smartphone and QR readers devices that will enable devices to scan QR codes.

Generate QR Code using PHP:
You can create your QR Code using the PHP QR Code library. Download the QR Code library and include in your script file.
include “phpqrcode/qrlib.php”;

// create your QR Code with new text and display it
QRcode::png(“Test QR Code”);

Following are some parameters which are used to create a interactive QR code:
$backColor = 0xFFFF00;
$foreColor = 0xFF00FF;

// Create a QR Code and export to SVG
QRcode::png(“https://solvemyques.com”, “test.png”, “L”, 4, 4, false, $backColor, $foreColor);

Parameter 1: Specifies the text or data which will be encoded into the image.
Parameter 2: Name of the output file if needed. The default value is boolean false.
Parameter 3: Level of error correction for the generated barcode. The higher the correction level, the less the data capacity of the barcode.
Parameter 4: The size of each of the barcode code squares measured in pixels.
Parameter 5: The white margin boundary around the barcode.
Parameter 6: It should be true for saving to a file and exporting to the browser. Default value is false.

Uses for QR Codes:
QR codes are used for various purposes, including:
– Marketing and Advertising
– Mobile Payments
– Ticketing and Event Management
– Product Tracking and Authentication
– Loyalty Programs
– Accessing Digital Content
– Sharing Contact Information
– Educational Purposes
– Inventory Management
– Personal Use

These codes provide quick access to information, facilitate transactions, and enhance user experiences in different industries and personal contexts.

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