php QR code generation_php skills

This article introduces two methods of using php to generate QR codes.
(1) Use Google’s open interface to generate QR codes. The code is as follows:

/** 
 * google api 二维码生成【QRcode可以存储最多4296个字母数字类型的任意文本，具体可以查看二维码数据格式】 
 * @param string $data 二维码包含的信息，可以是数字、字符、二进制信息、汉字。不能混合数据类型，数据必须经过UTF-8 URL-encoded.如果需要传递的信息超过2K个字节，请使用POST方式 
 * @param int $widhtHeight 生成二维码的尺寸设置 
 * @param string $EC_level 可选纠错级别，QR码支持四个等级纠错，用来恢复丢失的、读错的、模糊的、数据。 
 *       L-默认：可以识别已损失的7%的数据 
 *       M-可以识别已损失15%的数据 
 *       Q-可以识别已损失25%的数据 
 *       H-可以识别已损失30%的数据 
 * @param int $margin 生成的二维码离图片边框的距离 
 */ 
function generateQRfromGoogle($data,$widhtHeight='150',$EC_level='L',$margin='0'){ 
 $url=urlencode($data); 
 echo '<img src="http://chart.apis.google.com/chart&#63;chs='.$widhtHeight.'x'.$widhtHeight.'&cht=qr&chld='.$EC_level.'|'.$margin.'&chl='.$data.'" widhtHeight="'.$widhtHeight.'" widhtHeight="'.$widhtHeight.'"/>'; 
} 

Usage:

$data='版权所有：http://www.jb51.net'; 
generateQRfromGoogle($data); 

The post method implements the method of requesting Google API to generate a QR code:

function qrcode($width,$height,$string){ 
 $post_data=array(); 
 $post_data['cht']='qr'; 
 $post_data['chs']=$width."x".$height; 
 $post_data['chl']=$string; 
 $post_data['choe']="UTF-8"; 
 $url="http://chart.apis.google.com/chart"; 
 $data_Array=array(); 
 foreach($post_data as $key=>$value){ 
  $data_Array[]=$key.'='.$value; 
 } 
 $data=implode("&",$data_Array); 
 $ch=curl_init(); 
 curl_setopt($ch, CURLOPT_POST, 1); 
 curl_setopt($ch, CURLOPT_HEADER, 0); 
 curl_setopt($ch, CURLOPT_URL, $url);  
 curl_setopt($ch, CURLOPT_POSTFIELDS,$data); 
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
 $result=curl_exec($ch); 
 //echo "<img src =\"data:image/png;base64,".base64_encode($result)."\" >"; 注意，不写header的写法 
 return $result; 
} 

Usage:

header("Content-type:image/png"); 
$width=300; 
$height=300; 
$data='版权所有:http://www.jb51.net';
echo qrcode($width,$height,$data); 

Of course the generated image is the same as above.

(2) Use the php QR Code class library to generate QR codes
Note that to use this class library, you must first download the class library package. Download address:
Address: http://phpqrcode.sourceforge.net/
There are many examples in the downloaded compressed package, which you can study by yourself. Here is a simple use case (the meaning of the specific parameters is similar to the above):

<&#63;php 
include "./phpqrcode.php"; 
$data='版权所有：<a href="http://www.jb51.net'">http://www.jb51.net'</a>; 
$errorCorrectionLevel="L"; 
$matrixPointSize="4"; 
QRcode::png($data,false,$errorCorrectionLevel,$matrixPointSize);

The above is the entire content of this article. I hope it will be helpful for everyone to master the production of QR codes in PHP.