setSize( $size * 30 );
$qrCode->setMargin( $margin );
$qrCode->setErrorCorrectionLevel( $eccLevel );
$writer = $format === 'svg' ? new SvgWriter() : new PngWriter();
$writerOptions = [
SvgWriter::WRITER_OPTION_EXCLUDE_XML_DECLARATION => true
];
$result = $writer->write( $qrCode, null, null, $writerOptions );
if ( $format === 'svg' ) {
$image = '' . $result->getString() . '';
} else {
$image = Html::element( 'img', [ 'src' => $result->getDataUri(), 'title' => $content ] );
}
} catch ( Exception $e ) {
$image = '' . $e->getMessage() . '';
}
$downloadButtons = '';
$result = '' . $image . $downloadButtons . '';
return $result;
}
//////////////////////////////////////////
// HELPER FUNCTIONS //
//////////////////////////////////////////
/**
* Helper function, that safely checks whether an array key exists
* and returns the trimmed value. If it doesn't exist, returns $default or null
*
* @param array $params
* @param string $key
* @param mixed|null $default
*
* @return mixed
*/
public static function paramGet( $params, $key, $default = null ) {
if ( isset( $params[$key] ) ) {
return trim( $params[$key] );
} else {
return $default;
}
}
/**
* Debug function that converts an object/array to a wrapped pretty printed JSON string
*
* @param mixed $obj
* @return string
*/
public static function toJSON( $obj ) {
header( 'Content-Type: application/json' );
echo json_encode( $obj, JSON_PRETTY_PRINT );
die();
}
}