PHP uses endroid/qrcode QR code to generate, and Gd library generates sharing posters

design sketch ：

1. Use composer install  endroid/qrcode

github Address ：https://github.com/endroid/qr-code

composer require endroid/qrcode

2. install php install gd Expand

gd Extended reference manual ：https://www.php.net/manual/zh/book.image.php

<?php


namespace app\index\controller;


use Endroid\QrCode\QrCode;

class Poster
{
    function __construct($imgFolder,  $fontFolder) {
        $this->imgFolder = $imgFolder;
        $this->fontFolder = $fontFolder;
    }

    private $imgFolder;
    private $fontFolder;

    public function create($url, $userName, $title)
    {
        // 1  Get the size of the background image 
        list($bg_w,$bg_h) = getimagesize($this->imgFolder."/bg.jpg");
        // 2  Create a picture 
        $img = @imagecreatetruecolor($bg_w,$bg_h);
        // 3  Fill in the canvas background color 
        $img_bg_color = imagecolorallocate($img,255,255,255);
        imagefill($img,0,0,$img_bg_color);
        // 4  Fill the background image into the canvas 
        $bg_img = $this->getImgReource($this->imgFolder."/bg.jpg");
        imagecopyresized($img,$bg_img,0,0,0,0,$bg_w,$bg_h,$bg_w,$bg_h);
        // 5  Generate qr code ,  Fill in user QR code 
        $qecodeName = $this->generateQrcode($url);
        $qrcode = $this->getImgReource($qecodeName);
        //  Get QR code size 
        list($qr_w,$qr_h) = getimagesize($qecodeName);
        imagecopyresized($img,$qrcode,40,638,0,0,220,220,$qr_w,$qr_h);
        // 6  Fill in the user image 
        $user_img = $this->getImgReource($this->imgFolder."/head.png");
        list($user_w,$user_h) = getimagesize($this->imgFolder."/head.png");
        imagecopyresized($img,$user_img,40,380,0,0,130,130,$user_w,$user_h);
        //  Fill in the blank user name 
        $font_color = ImageColorAllocate($img,0,0,0); // The font color 
        $font_ttf =  $this->fontFolder. "/MSYHB.ttf";
        $font_ttf2 = $this->fontFolder. "/MSYHL.ttc";
        imagettftext($img,32,0,205,430,$font_color,$font_ttf,$userName);
        // 7  Set title 
        imagettftext($img,24,0,205,490,$font_color,$font_ttf2,$title);
        // 8  Save the picture 
        $posterName = $this->imgFolder."/".date("YmdHis", time()).$this->generateRandomString().".png";
        imagepng($img,$posterName);
        
        return $posterName;



    }

    private function generateQrcode($url)
    {
        $qrCode = new QrCode($url);
        $qrCode->setSize(300);
        $qrCode->setWriterByName('png');
        $qrCode->setMargin(10);
        $qrCode->setEncoding('UTF-8');
//        $qrCode->setErrorCorrectionLevel(ErrorCorrectionLevel::HIGH());
        $qrCode->setForegroundColor(['r' => 0, 'g' => 0, 'b' => 0, 'a' => 0]);
        $qrCode->setBackgroundColor(['r' => 255, 'g' => 255, 'b' => 255, 'a' => 0]);
        $qrCode->setLogoSize(150, 200);
        $qrCode->setRoundBlockSize(true);
        $qrCode->setValidateResult(false);
        $qrCode->setWriterOptions(['exclude_xml_declaration' => true]);
        print_r(gettype($qrCode->writeString()));
        $qecodeName = $this->imgFolder."/".date("YmdHis", time()).$this->generateRandomString().".png";  // 2017-12-14 23:13:51
        $qrCode->writeFile($qecodeName);
        return $qecodeName;
    }

    private function generateRandomString($length = 10) {
        $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $randomString = '';
        for ($i = 0; $i < $length; $i++) {
            $randomString .= $characters[rand(0, strlen($characters) - 1)];
        }
        return $randomString;
    }

    /**
     *  Get image file resources 
     * @param string $file
     * @return resource
     */
    protected function getImgReource($file){
        $file_ext = pathinfo($file,PATHINFO_EXTENSION);
        switch ($file_ext){
            case 'jpg':
            case 'jpeg':
                $img_reources = @imagecreatefromjpeg($file);
                break;
            case 'png':
                $img_reources = @imagecreatefrompng($file);
                break;
            case 'gif':
                $img_reources = @imagecreatefromgif($file);
                break;
        }
        return  $img_reources;
    }
}