我想在控制台上输出一个二维码?

使用半高上下、全块和空格在一行文本中编码两行二维码。

例如,基于 bacon/bacon-qr-code

<?php
require(__DIR__.'/vendor/autoload.php');
use BaconQrCode\Encoder\QrCode;

class HalfText extends \BaconQrCode\Renderer\Text\Plain {
    protected $fullBlock    = "\xE2\x96\x88";
    protected $emptyBlock   = "\x20";
    protected $halfUpBlock  = "\xE2\x96\x80";
    protected $halfDnBlock  = "\xE2\x96\x84";

    public function render(QrCode $qrCode) {
        $result = '';
        $matrix = $qrCode->getMatrix();
        $width  = $matrix->getWidth();

        // Top margin
        for ($x = 0; $x < $this->margin; $x++) {
            $result .= str_repeat($this->emptyBlock, $width + 2 * $this->margin) . PHP_EOL;
        }

        // Body
        $array = $matrix->getArray();

        for( $y=0, $height=count($array); $y<$height; $y+=2 ) {
            $result .= str_repeat($this->emptyBlock, $this->margin); // left margin
            $oddBottom = ! key_exists($y+1, $array);
            for( $x=0, $width=count($array[$y]); $x<$width; $x++ ) {
                $top = $array[$y][$x];
                $bottom = $oddBottom ? 0 : $array[$y+1][$x];
                switch( ($top << 1) | $bottom ) {
                    case 0:
                        $result .= $this->emptyBlock;
                        break;
                    case 1:
                        $result .= $this->halfDnBlock;
                        break;
                    case 2:
                        $result .= $this->halfUpBlock;
                        break;
                    case 3:
                        $result .= $this->fullBlock;
                        break;
                    default:
                        throw new BaconQrCode\Exception\OutOfBoundsException();
                }
            }
            $result .= str_repeat($this->emptyBlock, $this->margin); // right margin
            $result .= PHP_EOL;
        }

        // Bottom margin
        for ($x = 0; $x < $this->margin; $x++) {
            $result .= str_repeat($this->emptyBlock, $width + 2 * $this->margin) . PHP_EOL;
        }

        return $result;
    }
}

// testing
use \BaconQrCode\Writer;

if( $argc !== 2 ) {
    exit(1);
}

$r = new HalfText();
$w = new Writer($r);

echo $w->writeString($argv[1]);

输出示例:

 █▀▀▀▀▀█ █▄▄█  █▀▀▀▀▀█
 █ ███ █   █   █ ███ █
 █ ▀▀▀ █ █▄ █  █ ▀▀▀ █
 ▀▀▀▀▀▀▀ █ ▀ █ ▀▀▀▀▀▀▀
 ▀▀█ ▄█▀ ███ ▄█▀▀█▄ ██
  ▀▄█▀█▀▀  ▄█▀▄ ▄██▀ ▀
  ▀▀ ▀ ▀ ▄█▀ ██▄ ▄▄ ▀▄
 █▀▀▀▀▀█ ▄▀  ▀▄ ███▀▄▀
 █ ███ █  ▀▀ ▄█▄ ▄  █▀
 █ ▀▀▀ █ █▀▄▄█▄ ▀█▀▀▀▀
 ▀▀▀▀▀▀▀ ▀   ▀▀ ▀    ▀

Woops有人已经为此做了更好的公关,哦,好吧。

https://github.com/Bacon/BaconQrCode/pull/25