How to generate QR code in php through Qrcode

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/**
* phpqrcode.php provides a key png() method, where
* The parameter $text represents the generated two-digit information text;
* The parameter $outfile represents whether to output a QR code image file. The default is no;
* Parameter $level represents the fault tolerance rate, that is, the covered area can still be identified, which are L (QR_ECLEVEL_L, 7%), M (QR_ECLEVEL_M, 15%), Q (QR_ECLEVEL_Q, 25%) , H (QR_ECLEVEL_H, 30%);
* Parameter $size indicates the size of the generated image, the default is 3; Parameter $margin indicates the spacing value of the blank area of ​​the border around the QR code;
* Parameter $saveandprint indicates whether to save the second QR code and display.
* public static function png($text, $outfile=false, $level=QR_ECLEVEL_L, $size=3, $margin=4, $saveandprint=false)
{
$enc = QRecode:: factory($level, $size, $margin);
return $enc->encodePNG($text, $outfile, $saveandprint=false);
}

*
Call PHP QR Code is very simple. The following code can generate a QR code with the content "http://www.baidu.com/".

include 'phpqrcode.php';
QRcode::png('http://www.baidu.com/');

*/


include 'phpqrcode/phpqrcode.php';
// QR code content
$value = 'iphone';
//Error tolerance level
$errorCorrenctionLevel = 'l';
//QR code image size

$matrixPointSize = 6;

$path = RUNTIME_PATH."Temp/qrcode/";

// Generate File name
$fileName = $path.time().'.png';

//Generate QR code
Qrcode::png( $value,$fileName,$errorCorrenctionLevel,$matrixPointSize,2);
//Add QR code to picture logo
$logo = '6s.jpg';
$qrcode = $fileName ;//QR code path
$logo = imagecreatefromstring(file_get_contents($logo));
$qrcode = imagecreatefromstring(file_get_contents($qrcode));
$QR_width = imagesx($qrcode) ;//Width of QR code image
$QR_height = imagesy($qrcode);//Height of QR code image
$logo_width = imagesx($logo);//Width of logo image
$logo_height = imagesy($logo);//Logo image height
$logo_qr_width = $QR_width / 5;
$scale = $logo_width/$logo_qr_width;
$logo_qr_height = $logo_height/$scale;
$ from_width = ($QR_width - $logo_qr_width) / 2;
//Recombine the image and resize it
imagecopyresampled($qrcode, $logo, $from_width, $from_width, 0, 0, $logo_qr_width,$logo_qr_height, $logo_width, $logo_height);
//Save the generated QR code
imagepng($qrcode, 'helloweixin.png');
echo ' ';

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