How to generate QR code in PHP

QR (Quick Response) code used to read your data in your smart devices for ease. If you have a visiting card and want to add name, email and mobile number in you mobile its hart to type if there is a QR code of contact added on that card then you can easily add that in you contact list by scanning that code. Today i am going to show you how to generate a QR code in PHP.

Create file QRGenerator.php

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<?php class QRGenerator {       protected $size;     protected $data;     protected $encoding;     protected $errorCorrectionLevel;     protected $marginInRows;     protected $debug;       public function __construct($data='https://www.phpgang.com',$size='300',$encoding='UTF-8',$errorCorrectionLevel='L',$marginInRows=4,$debug=false) {           $this->data=urlencode($data);         $this->size=($size>100 && $size<800)? $size : 300;         $this->encoding=($encoding == 'Shift_JIS' || $encoding == 'ISO-8859-1' || $encoding == 'UTF-8') ? $encoding : 'UTF-8';         $this->errorCorrectionLevel=($errorCorrectionLevel == 'L' || $errorCorrectionLevel == 'M' || $errorCorrectionLevel == 'Q' || $errorCorrectionLevel == 'H') ?  $errorCorrectionLevel : 'L';         $this->marginInRows=($marginInRows>0 && $marginInRows<10) ? $marginInRows:4;         $this->debug = ($debug==true)? true:false;         } public function generate(){           $QRLink = "https://chart.googleapis.com/chart?cht=qr&chs=".$this->size."x".$this->size.                            "&chl=" . $this->data .                      "&choe=" . $this->encoding .                    "&chld=" . $this->errorCorrectionLevel . "|" . $this->marginInRows;         if ($this->debug) echo   $QRLink;                   return $QRLink;     } ?>

In a above class we have make many  options image size, data etc now showing you examples of it to generate images.

Example 1: Without data it will generate QR code of https://www.phpgang.com/ link.

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<?php $ex1 = new QRGenerator(); echo "<img src=".$ex1->generate().">"; ?>

Example 2: This will generate different url with different image size.

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<?php $ex2 = new QRGenerator('http://google.com',100); echo "<img src=".$ex2->generate().">"; ?>

Example 3: This will Generate simple text QR code with different encoding.

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<?php $ex3 = new QRGenerator('THIS IS JUST A TEXT',100,'ISO-8859-1'); echo "<img src=".$ex3->generate().">"; ?>