# woocommerce-pos/1.10.18/vendor_prefixed/chillerlan/php-qrcode/src/Output/QRString.php

WCPOS – Point of Sale (POS) plugin for WooCommerce, version 1.10.18. 102 lines.

- Page: https://pluginprobe.com/plugins/woocommerce-pos/1.10.18/code/vendor_prefixed/chillerlan/php-qrcode/src/Output/QRString.php
- Raw: https://pluginprobe.com/plugins/woocommerce-pos/1.10.18/raw/vendor_prefixed/chillerlan/php-qrcode/src/Output/QRString.php
- Modified: 2026-06-09T13:55:26+00:00

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```php
<?php

/**
 * Class QRString
 *
 * @created      05.12.2015
 * @author       Smiley <smiley@chillerlan.net>
 * @copyright    2015 Smiley
 * @license      MIT
 *
 * @noinspection PhpComposerExtensionStubsInspection
 */
namespace WCPOS\Vendor\chillerlan\QRCode\Output;

use function implode, is_string, json_encode, max, min, sprintf;
use const JSON_THROW_ON_ERROR;
/**
 * Converts the matrix data into string types
 *
 * @deprecated 5.0.0 this class will be removed in future versions, use one of QRStringText or QRStringJSON instead
 */
class QRString extends QROutputAbstract
{
    /**
     * @inheritDoc
     */
    public static function moduleValueIsValid($value) : bool
    {
        return is_string($value);
    }
    /**
     * @inheritDoc
     */
    protected function prepareModuleValue($value) : string
    {
        return $value;
    }
    /**
     * @inheritDoc
     */
    protected function getDefaultModuleValue(bool $isDark) : string
    {
        return $isDark ? '██' : '░░';
    }
    /**
     * @inheritDoc
     */
    public function dump(?string $file = null) : string
    {
        switch ($this->options->outputType) {
            case QROutputInterface::STRING_TEXT:
                $data = $this->text();
                break;
            case QROutputInterface::STRING_JSON:
            default:
                $data = $this->json();
        }
        $this->saveToFile($data, $file);
        return $data;
    }
    /**
     * string output
     */
    protected function text() : string
    {
        $lines = [];
        $linestart = $this->options->textLineStart;
        for ($y = 0; $y < $this->moduleCount; $y++) {
            $r = [];
            for ($x = 0; $x < $this->moduleCount; $x++) {
                $r[] = $this->getModuleValueAt($x, $y);
            }
            $lines[] = $linestart . implode('', $r);
        }
        return implode($this->eol, $lines);
    }
    /**
     * JSON output
     *
     * @throws \JsonException
     */
    protected function json() : string
    {
        return json_encode($this->matrix->getMatrix($this->options->jsonAsBooleans), JSON_THROW_ON_ERROR);
    }
    //
    /**
     * a little helper to create a proper ANSI 8-bit color escape sequence
     *
     * @see https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit
     * @see https://en.wikipedia.org/wiki/Block_Elements
     *
     * @codeCoverageIgnore
     */
    public static function ansi8(string $str, int $color, ?bool $background = null) : string
    {
        $color = max(0, min($color, 255));
        $background = $background === \true ? 48 : 38;
        return sprintf("\x1b[%s;5;%sm%s\x1b[0m", $background, $color, $str);
    }
}

```