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<?php

/**

* Copyright 2016 Google Inc.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

/**

* For instructions on how to run the full sample:

*

* @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/speech/README.md

*/

namespace Google\Cloud\Samples\Speech;

# [START speech_transcribe_sync]

use Google\Cloud\Speech\V1\SpeechClient;

use Google\Cloud\Speech\V1\RecognitionAudio;

use Google\Cloud\Speech\V1\RecognitionConfig;

use Google\Cloud\Speech\V1\RecognitionConfig\AudioEncoding;

/**

* Transcribe an audio file using Google Cloud Speech API

* Example:

* ```

* transcribe_sync('/path/to/audiofile.wav');

* ```.

*

* @param string $audioFile path to an audio file.

*

* @return string the text transcription

*/

function transcribe_sync($audioFile)

{

// change these variables

$encoding = AudioEncoding::LINEAR16;

$sampleRateHertz = 32000;

$languageCode = 'en-US';

// get contents of a file into a string

$content = file_get_contents($audioFile);

// set string as audio content

$audio = (new RecognitionAudio())

->setContent($content);

// set config

$config = (new RecognitionConfig())

->setEncoding($encoding)

->setSampleRateHertz($sampleRateHertz)

->setLanguageCode($languageCode);

// create the speech client

$client = new SpeechClient();

try {

$response = $client->recognize($config, $audio);

foreach ($response->getResults() as $result) {

$alternatives = $result->getAlternatives();

$mostLikely = $alternatives[0];

$transcript = $mostLikely->getTranscript();

$confidence = $mostLikely->getConfidence();

printf('Transcript: %s' . PHP_EOL, $transcript);

printf('Confidence: %s' . PHP_EOL, $confidence);

}

} finally {

$client->close();

}

}

# [END speech_transcribe_sync]