Aws\Polly\PollyClient::createSynthesizeSpeechPreSignedUrl PHP Method

    public function createSynthesizeSpeechPreSignedUrl(array $args)
    {
        $uri = new Uri($this->getEndpoint());
        $uri = $uri->withPath('/v1/speech');
        // Formatting parameters follows rest-json protocol
        $this->formatter = $this->formatter ?: new JsonBody($this->getApi());
        $queryArray = json_decode($this->formatter->build($this->getApi()->getOperation('SynthesizeSpeech')->getInput(), $args), true);
        // Mocking a 'GET' request in pre-signing the Url
        $query = Psr7\build_query($queryArray);
        $uri = $uri->withQuery($query);
        $request = new Request('GET', $uri);
        $request = $request->withBody(Psr7\stream_for(''));
        $signer = new SignatureV4('polly', $this->getRegion());
        return (string) $signer->presign($request, $this->getCredentials()->wait(), '+15 minutes')->getUri();
    }