HTMLSpecialCharsAsEntities.php

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<?php

declare(strict_types=1);

namespace ILIAS\Refinery\Encode\Transformation;

use ILIAS\Refinery\Transformation;
use ILIAS\Refinery\DeriveInvokeFromTransform;
use ILIAS\Refinery\DeriveApplyToFromTransform;
use ValueError;

class HTMLSpecialCharsAsEntities implements Transformation
{
    use DeriveInvokeFromTransform;
    use DeriveApplyToFromTransform;

    public function transform($from)
    {
        if (false === preg_match('//u', $from)) {
            throw new ValueError('Invalid UTF-8 string given.');
        }
        return htmlspecialchars($from, ENT_QUOTES | ENT_SUBSTITUTE, 'utf-8');
    }
}