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Home Backend Development PHP Tutorial PHP generates QR code and adds logo between QR images_PHP tutorial

PHP generates QR code and adds logo between QR images_PHP tutorial

Jul 14, 2016 am 10:07 AM
logo php two add back and picture generate of code

When I wrote the QR code two years ago, no one knew it. Later, there were more software for scanning QR codes on mobile phones, and WeChat also changed this era.
Thanks to smartphones and WeChat.


================================================== ============
QR code is a type of two-dimensional barcode that can compile information such as website addresses, text, photos, etc. into a square barcode pattern through corresponding encoding algorithms. Mobile phone users can re-decode the relevant information and view the content through the camera and decoding software.

Two-dimensional bar code (dimensional bar code) uses a specific geometric figure to record data symbol information in black and white graphics distributed on a plane (in a two-dimensional direction) according to certain rules; it is cleverly used in code compilation. The concept of "0" and "1" bit streams, which form the basis of computer internal logic, uses several geometric shapes corresponding to binary to represent text numerical information, and automatically reads the information through image input equipment or photoelectric scanning equipment to achieve automatic information Processing: It has some common features of barcode technology: each code system has its own specific character set; each character occupies a certain width; it has certain verification functions, etc. At the same time, it also has the features of automatically identifying different lines of information and processing graphics rotation changes. Among many types of two-dimensional barcodes, commonly used code systems include: Data Matrix, Maxi Code, Aztec, QR Code, Vericode, PDF417, Ultracode, Code 49, Code 16K, etc. The QR code was developed by the Japanese company Denso-Wave in 1994. invention. QR comes from the abbreviation of "Quick Response" in English, which means quick response. It comes from the inventor's hope that the content of QR codes can be decoded quickly. QR codes are most common in Japan and South Korea; they are currently the most popular two-dimensional barcode in Japan.

<?php
 /**  * php生成二維碼的2種方式
  * @author insun  */ //1.google開放api
 $urlToEncode="smart_insun";
 generateQRfromGoogle($urlToEncode);
 function generateQRfromGoogle($chl,$widhtHeight =&#39;150&#39;,$EC_level=&#39;L&#39;,$margin=&#39;0&#39;)
 {  //$url = urlencode($url);
  echo &#39;<img src="http://chart.apis.google.com/chart?chs=&#39;.$widhtHeight.&#39;x&#39;.$widhtHeight.&#39;&cht=qr&chld=&#39;.$EC_level.&#39;|&#39;.$margin.&#39;&chl=&#39;.$chl.&#39;" alt="QR code" widhtHeight="&#39;.$widhtHeight.&#39;" widhtHeight="&#39;.$widhtHeight.&#39;"/>';
 } //2.php類庫PHP QR Code:http://phpqrcode.sourceforge.net/
 /* $data 數(shù)據(jù)
 $filename 保存的圖片名稱
 $errorCorrectionLevel 錯誤處理級別
 $matrixPointSize 每個黑點的像素
 $margin 圖片外圍的白色邊框像素
 */ include "phpqrcode/qrlib.php";
 $data = "insun";
 $filename ="QR.jpg";
 $errorCorrectionLevel = 'L';
 $matrixPointSize = 2;
 $margin = 5;
 QRcode::png($data, $filename, $errorCorrectionLevel, $matrixPointSize, $margin);//這樣就生成了QR.jpg
 
?
php生成二維碼的幾種方式 - InSun - Minghacker is Insun


QR圖片中間加logo

<?php
 /**  * QR Code + Logo Generator QR圖片中間加logo,QR是根據(jù)google開放api生成的,其實啥都沒有
   *    * http://labs.nticompassinc.com     */  //ini_set("auto_detect_line_endings", true);
  
  $data = isset($_GET[&#39;data&#39;]) ? $_GET[&#39;data&#39;] : &#39;http://weixin.qq.com/r/8bxsY6LEqpzVh7MAn_nV&#39;;
  $size = isset($_GET[&#39;size&#39;]) ? $_GET[&#39;size&#39;] : &#39;200x200&#39;;
  $logo = isset($_GET[&#39;logo&#39;]) ? $_GET[&#39;logo&#39;] : &#39;./logo.jpg&#39;;//中間那logo圖
  // Get QR Code image from Google Chart API
  // http://code.google.com/apis/chart/infographics/docs/qr_codes.html
  //https://chart.googleapis.com/chart?cht=qr&chld=H|1&chs=&#39;.$size.&#39;&chl=&#39;.urlencode($data));
  $png = "http://chart.googleapis.com/chart?chs=150x150&cht=qr&chl=Hello+world&chld=L|1&choe=UTF-8";
  $QR = imagecreatefrompng($png);//Warning: imagecreatefrompng() [function.imagecreatefrompng]: Unable to find the wrapper "https" - did you forget to enable it when you configured PHP? =
  //$QR = imagecreatefrompng(&#39;./chart.png&#39;);//外面那QR圖
  if($logo !== FALSE){
   $logo = imagecreatefromstring(file_get_contents($logo));
  
   $QR_width = imagesx($QR);
   $QR_height = imagesy($QR);
       
   $logo_width = imagesx($logo);
   $logo_height = imagesy($logo);
          
   // Scale logo to fit in the QR Code
   $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;
   //echo $from_width;exit;
   imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
  }
  header(&#39;Content-type: image/png&#39;);
  imagepng($QR);
  imagedestroy($QR);
 ?>
?

Reference: QR
http://phpqrcode.sourceforge.net/

Introduction to the use of PHP QR Code, a class library for generating QR codes in PHP
http://www.BkJia.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

There are several ways to generate QR code in php
http://blog.csdn.net/shojecom/article/details/8158571

http://www.qrhacker.com/
http://www.shadowdev.com/services/qr/

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477849.htmlTechArticleNo one knew me when I wrote QR code two years ago. Later, there were more software for scanning QR codes on mobile phones, and WeChat also changed this era. Thanks to smartphones and WeChat. ==============...
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