68 lines
1.7 KiB
PHP
68 lines
1.7 KiB
PHP
<?php
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namespace RobThree\Auth\Providers\Qr;
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// https://developers.google.com/chart/infographics/docs/qr_codes
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class GoogleChartsQrCodeProvider extends BaseHTTPQRCodeProvider
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{
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/** @var string */
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public $errorcorrectionlevel;
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/** @var int */
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public $margin;
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/** @var string */
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public $encoding;
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/**
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* @param bool $verifyssl
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* @param string $errorcorrectionlevel
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* @param int $margin
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* @param string $encoding
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*/
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public function __construct($verifyssl = false, $errorcorrectionlevel = 'L', $margin = 4, $encoding = 'UTF-8')
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{
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if (!is_bool($verifyssl)) {
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throw new QRException('VerifySSL must be bool');
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}
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$this->verifyssl = $verifyssl;
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$this->errorcorrectionlevel = $errorcorrectionlevel;
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$this->margin = $margin;
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$this->encoding = $encoding;
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}
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/**
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* {@inheritdoc}
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*/
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public function getMimeType()
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{
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return 'image/png';
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}
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/**
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* {@inheritdoc}
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*/
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public function getQRCodeImage($qrtext, $size)
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{
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return $this->getContent($this->getUrl($qrtext, $size));
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}
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/**
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* @param string $qrtext the value to encode in the QR code
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* @param int|string $size the desired size of the QR code
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*
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* @return string file contents of the QR code
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*/
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public function getUrl($qrtext, $size)
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{
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return 'https://chart.googleapis.com/chart'
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. '?chs=' . $size . 'x' . $size
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. '&chld=' . urlencode(strtoupper($this->errorcorrectionlevel) . '|' . $this->margin)
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. '&cht=' . 'qr'
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. '&choe=' . $this->encoding
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. '&chl=' . rawurlencode($qrtext);
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}
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}
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