Tinkphp uses the phpqrcode extension library to generate a QR code

1. Download the phpqrcode extension library

Official download address: https://sourceforge.net/projects/phpqrcode/files/

Second, use the phpqrcode extension library

1. After decompression, open the following picture:

2. In order to facilitate the call, we can modify the file name of phpqrcode.php to " QRcode.php ", and then add the namespace, as follows:

3. Put the phpqrcode folder in the extend directory

 

4. Call in code

//引用
use phpqrcode\QRcode;
//调用类库静态方法
$qrcode=QRcode::png('二维码内容',false, '容错级别', '图片大小', '外边距离(白边)	');

5. Example 

<?php
namespace app\index\controller;
use think\Controller;
use phpqrcode\QRcode;

class Qr extends Controller
{
	/**
     * 生成二维码接口
     */
	public function api(){
		$data=input('');
		!isset($data['text']) && $this->error('参数非法');
		$text  = trim($data['text']); 
		//计算图片尺寸
		$width = isset($data['width']) ? trim($data['width']):100;	
		$size  = floor($width/37*100)/100 + 0.01;
		
		$errorCorrectionLevel =intval(2) ;//容错级别 
      	$matrixPointSize = intval($size); //生成图片大小 
		$margin =0;//外边距离(白边)		
		$qrcode=QRcode::png($text,false, $errorCorrectionLevel, $matrixPointSize, $margin);
		die;
	}
}
?>