Use Thinkphp3.2 combined with phpqrcode to generate QR code

First, download phpqrcode and extract it to the project ThinkPHP\Library\Vendor directory.
Index_index.html (the template can be configured by yourself)

    尺寸大小：
            
    边距大小：
         
            1px
            2px
            3px
            5px
        
    容错级别：
        
        Low (7%)
        Medium (15%)
        Quartile (25%)
        High (30%)
        
    二维码内容：
            
    二维码logo：

Controller: IndexController.class.php

<?php
namespace Home\Controller;
    use Think\Controller;
    class IndexController extends Controller {
    public function index() {
    $config = array( &#39;maxSize&#39; => 3145728, &#39;rootPath&#39; => &#39;./upload/&#39;, &#39;savePath&#39; => &#39;&#39;, &#39;saveName&#39; => array(&#39;uniqid&#39;,&#39;&#39;), &#39;exts&#39; => array(&#39;jpg&#39;, &#39;gif&#39;, &#39;png&#39;, &#39;jpeg&#39;), &#39;autoSub&#39; => true, &#39;subName&#39; => array(&#39;date&#39;,&#39;Ymd&#39;), );
    $upload = new \Think\Upload($config);
    // 实例化上传类 // 上传单个文件 $info = $upload->uploadOne($_FILES[&#39;test&#39;]);
    if(!$info) {
    // 上传错误提示错误信息 $qrcode_path_new = &#39;./Public/Home/images/code&#39;.&#39;_&#39;.date("Ymdhis").&#39;.png&#39;;
    $content = $_POST[&#39;content&#39;];
    $matrixPointSize = $_POST[&#39;matrixPointSize&#39;];
    $matrixMarginSize = $_POST[&#39;matrixMarginSize&#39;];
    $errorCorrectionLevel = $_POST[&#39;errorCorrectionLevel&#39;];
    makecode_no_pic($content,$qrcode_path_new,$matrixPointSize,$matrixMarginSize,$errorCorrectionLevel);
    $this->assign(&#39;img&#39;,$qrcode_path_new);
}
else {
    $qrcode_path = "./upload/".$info[&#39;savepath&#39;].$info[&#39;savename&#39;];
    $content = $_POST[&#39;content&#39;];
    $matrixPointSize = $_POST[&#39;matrixPointSize&#39;];
    $matrixMarginSize = $_POST[&#39;matrixMarginSize&#39;];
    $errorCorrectionLevel = $_POST[&#39;errorCorrectionLevel&#39;];
    $url = "./upload/qrcode/".date("YmdHis").".png";
    makecode($qrcode_path,$content,$matrixPointSize,$matrixMarginSize,$errorCorrectionLevel,$url);
    $this->assign(&#39;img&#39;,$url);
}
$this->display();
}
}

Then create a new function.php under the project Application/Home/Common

<?phpfunction makecode($qrcode_path,$content,$matrixPointSize,$matrixMarginSize,$errorCorrectionLevel,$url) {
    /** 参数详情： * $qrcode_path:logo地址 * $content:需要生成二维码的内容 * $matrixPointSize:二维码尺寸大小 * $matrixMarginSize:生成二维码的边距 * $errorCorrectionLevel:容错级别 * $url:生成的带logo的二维码地址 **/
    ob_clean ();
    Vendor(&#39;phpqrcode.phpqrcode&#39;);
    $object = new \QRcode();
    $qrcode_path_new = &#39;./Public/Home/images/code&#39;.&#39;_&#39;.date("Ymdhis").&#39;.png&#39;;
    //定义生成二维码的路径及名称 $object::png($content,$qrcode_path_new, $errorCorrectionLevel, $matrixPointSize, $matrixMarginSize);
    $QR = imagecreatefromstring(file_get_contents($qrcode_path_new));
    //imagecreatefromstring:创建一个图像资源从字符串中的图像流 $logo = imagecreatefromstring(file_get_contents($qrcode_path));
    $QR_width = imagesx($QR);
    // 获取图像宽度函数 $QR_height = imagesy($QR);
    //获取图像高度函数 $logo_width = imagesx($logo);
    // 获取图像宽度函数 $logo_height = imagesy($logo);
    //获取图像高度函数 $logo_qr_width = $QR_width / 4;
    //logo的宽度 $scale = $logo_width / $logo_qr_width;
    //计算比例 $logo_qr_height = $logo_height / $scale;
    //计算logo高度 $from_width = ($QR_width - $logo_qr_width) / 2;
    //规定logo的坐标位置 imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
    /** imagecopyresampled ( resource $dst_image , resource $src_image , int $dst_x , int $dst_y , int $src_x , int $src_y , int $dst_w , int $dst_h , int $src_w , int $src_h ) * 参数详情： * $dst_image:目标图象连接资源。 * $src_image:源图象连接资源。 * $dst_x:目标 X 坐标点。 * $dst_y:目标 Y 坐标点。 * $src_x:源的 X 坐标点。 * $src_y:源的 Y 坐标点。 * $dst_w:目标宽度。 * $dst_h:目标高度。 * $src_w:源图象的宽度。 * $src_h:源图象的高度。 **/
    Header("Content-type: image/png");
    //$url:定义生成带logo的二维码的地址及名称 imagepng($QR,$url);
}
function makecode_no_pic($content,$qrcode_path_new,$matrixPointSize,$matrixMarginSize,$errorCorrectionLevel) {
    ob_clean ();
    Vendor(&#39;phpqrcode.phpqrcode&#39;);
    $object = new \QRcode();
    $object::png($content,$qrcode_path_new, $errorCorrectionLevel, $matrixPointSize, $matrixMarginSize);
}

When there is no picture uploaded, the QR code generated is just a simple QR code. Only when a logo is uploaded, the QR code with the logo will be generated.

The picture below is the QR code generated when there is no logo:

The picture below is The QR code generated when a picture is uploaded:

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