Utf8Mb4Sanitizer.php

Go to the documentation of this file.

<?php

declare(strict_types=1);

namespace ILIAS\Mail\Transformation;

use ilDBConstants;
use ILIAS\Refinery\ConstraintViolationException;
use ILIAS\Refinery\DeriveApplyToFromTransform;
use ILIAS\Refinery\DeriveInvokeFromTransform;
use ILIAS\Refinery\Transformation;

class Utf8Mb4Sanitizer implements Transformation
{
    use DeriveApplyToFromTransform;
    use DeriveInvokeFromTransform;

    public function transform($from): string
    {
        if (!\is_string($from)) {
            throw new ConstraintViolationException(
                'Value to be transformed must be of type string',
                'not_string'
            );
        }

        return preg_replace(
            '/[\x{10000}-\x{10FFFF}]/u',
            ilDBConstants::MB4_REPLACEMENT,
            $from
        );
    }
}