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Edit File: XmlResponse.php

<?php

declare(strict_types=1);

namespace Laminas\Diactoros\Response;

use Laminas\Diactoros\Exception;
use Laminas\Diactoros\Response;
use Laminas\Diactoros\Stream;
use Psr\Http\Message\StreamInterface;

use function get_debug_type;
use function is_string;
use function sprintf;

/**
 * XML response.
 *
 * Allows creating a response by passing an XML string to the constructor; by default,
 * sets a status code of 200 and sets the Content-Type header to application/xml.
 */
class XmlResponse extends Response
{
    use InjectContentTypeTrait;

/**
     * Create an XML response.
     *
     * Produces an XML response with a Content-Type of application/xml and a default
     * status of 200.
     *
     * @param string|StreamInterface $xml String or stream for the message body.
     * @param int $status Integer status code for the response; 200 by default.
     * @param array $headers Array of headers to use at initialization.
     * @throws Exception\InvalidArgumentException If $text is neither a string or stream.
     */
    public function __construct(
        $xml,
        int $status = 200,
        array $headers = []
    ) {
        parent::__construct(
            $this->createBody($xml),
            $status,
            $this->injectContentType('application/xml; charset=utf-8', $headers)
        );
    }

/**
     * Create the message body.
     *
     * @param string|StreamInterface $xml
     * @throws Exception\InvalidArgumentException If $xml is neither a string or stream.
     */
    private function createBody($xml): StreamInterface
    {
        if ($xml instanceof StreamInterface) {
            return $xml;
        }

if (! is_string($xml)) {
            throw new Exception\InvalidArgumentException(sprintf(
                'Invalid content (%s) provided to %s',
                get_debug_type($xml),
                self::class
            ));
        }

$body = new Stream('php://temp', 'wb+');
        $body->write($xml);
        $body->rewind();
        return $body;
    }
}

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