How to generate QR code in Laravel

This article mainly introduces the method of generating QR codes in Laravel. It has certain reference value. Now I share it with you. Friends in need can refer to it

(this article Example laravel version >=5.6, PHP version >=7.0)

1. First, add the QrCode package to your composer.json require in the file:

"require": {
    "simplesoftwareio/simple-qrcode": "~2"
}

Then, run composer update .

2. Basic usage

It is very convenient to use the QrCode Generator. In most cases, just do this:

QrCode::generate('Make me into a QrCode!');

This will create a scan that displays the content: "Make me into a QrCode!" QR code.

3. Define the output image format by yourself

QrCode Generator outputs images in SVG format by default.

Note ! format method must be set first, other settings are: size, color, backgroundColor, and margin The setting of must be behind it.

supports three formats: PNG, EPS, and SVG. The setting method is as follows:

QrCode::format('png');  //Will return a PNG image
QrCode::format('eps');  //Will return a EPS image
QrCode::format('svg');  //Will return a SVG image

4. Size setting

QrCode’s Generator returns the QR code with the smallest possible pixel unit by default.

You can use size method to set its size. The following is an example of setting the pixel size:

QrCode::size(100);

5. Color setting

Pay attention to after changing the color , which may cause difficulty in recognition by some devices.

The format of the color setting must be RBG format. The setting method is as follows:

QrCode::color(255,0,255);

Set the background The color method is the same:

QrCode::backgroundColor(255,255,0);

6. Margin setting

also supports setting margins. The setting method is as follows:

QrCode::margin(100);

7. Add a LOGO image

merge The method allows QrCode to add a LOGO image to the generated result. The following is a common way to add a LOGO image to the QR code. How to use images.

QrCode::merge($filename, $percentage, $absolute);
　　 //生成一个中间有LOGO图片的二维码
　　 QrCode::format('png')->merge('path-to-image.png')->generate();
　　//生成一个中间有LOGO图片的二维码,且LOGO图片占整个二维码图片的30%. 
　　QrCode::format('png')->merge('path-to-image.png', .3)->generate();
　　//使用绝对路径的LOGO图片地址创建二维码,LOGO图片占整个二维码图片的30%. 
　　QrCode::format('png')->merge('http://www.google.com/someimage.png', .3, true)->generate();

merge The method currently only supports images in PNG format and uses the root path relative to the application by default. The third parameter is set to true to switch to using the absolute path

The following is a complete small demo:

 /**
     * @param int $size  此参数为二维码的尺寸，是像素值
     * @param string $info 此参数为二维码的内容，内容为文字时，扫描展示的是此文字；
     *       内容为http://或https://开头的网址时，打开的就是此网址
     * @return mixed
     *
     */
    public static function createQrCode($size,$info)
    {
        $size = $size ?: 400;
        $info = $info ?: "success";
        $res = QrCode::size($size)->color(50,255,100)->generate($info);

        return $res;
    }

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