IsMimeTypeOrExtension.php

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<?php

namespace ILIAS\FileUpload\Processor;

use ILIAS\FileUpload\DTO\Metadata;

trait IsMimeTypeOrExtension
{
    protected function isMimeTypeOrExtension(
        Metadata $metadata,
        string $extention,
        array $mime_types
    ): bool {
        // is mime type
        $mime_type = strtolower($metadata->getMimeType());
        $mime_types = array_map('strtolower', $mime_types);
        if (in_array($mime_type, $mime_types, true)) {
            return true;
        }
        // is extension
        return substr_compare(
            $metadata->getFilename(),
            $extention,
            -strlen($extention),
            null,
            true
        ) === 0;
    }
}