[LINUX] Command to generate QR code


#Confirmed on CentOS 6(Not in CentOS 5)
yum install -y qrencode
# Ubuntu 20.Confirmed at 04
apt install -y qrencode

How to use

When making an image

qrencode -o a.png "http://qiita.com"

When outputting to the terminal

qrencode -t ansi "http://qiita.com"

Run in php and view the result


function echo_qrcode($str) {
        $command = sprintf('/usr/bin/qrencode "%s" -o -', $str);
        $qrcode = `$command`;
        header("Content-type: image/png");
        echo $qrcode;

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