Google Cloud Text to speech in php - php

Question

I am trying to use google's text to speech in my php website to be hosted on a live Cpanel Server
I have enabled the text to speech API, Created API KEY in Credentials section, also downloaded the json file of credentials from Create service account key page.
Then I downloaded the sample files from Github and also used composer to build the library
Now I dont understand where to put my keys. At every place, it demangs to EXPORT the key in Shell, but that would work for 1 open command prompt session and will have to be exported every time.
As I want to run this code on a live cpanel based hosting, so I think it wont be possible to export.
Is there any place within the codes where I can pass the key?
On this url article at stackoverflow: the first answer exports the response of CURL to synthesize-text.txt but we require mp3 output
Another answer states that we should use jq but since its a shared hsoting server, I am not sure if we can arrange jq.
Is ther any way out to this problem?
Update
Tried the following code after referring to the answer by #V.Tur
$params = [
"audioConfig"=>[
"audioEncoding"=>"MP3",
"pitch"=> "1",
"speakingRate"=> "1",
"effectsProfileId"=> [
"medium-bluetooth-speaker-class-device"
]
],
"input"=>[
"ssml"=>'<speak>The <say-as interpret-as=\"characters\">SSML</say-as>
standard <break time=\"1s\"/>is defined by the
<sub alias=\"World Wide Web Consortium\">W3C</sub>.</speak>'
],
"voice"=>[
"languageCode"=> "hi-IN",
"name" =>"hi-IN-Wavenet-B",
'ssmlGender'=>'MALE'
]
];
$data_string = json_encode($params);
$speech_api_key = "My_Key_Here";
$url = 'https://texttospeech.googleapis.com/v1/text:synthesize?fields=audioContent&key=' . $speech_api_key;
$handle = curl_init($url);
curl_setopt($handle, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($handle, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);
curl_setopt($handle, CURLOPT_HTTPHEADER, [
'Content-Type: application/json',
'Content-Length: ' . strlen($data_string)
]
);
$response = curl_exec($handle);
$responseDecoded = json_decode($response, true);
curl_close($handle);
if($responseDecoded['audioContent']){
return $responseDecoded['audioContent'];
}
I get the audio downloaded but the pauses/breaks I have mentioned in ssml did not work. I tried passing data to $params as below
$params = "{
'input':{
'ssml':'<speak>The <say-as interpret-as=\"characters\">SSML</say-as>
standard <break time=\"1s\"/>is defined by the
<sub alias=\"World Wide Web Consortium\">W3C</sub>.</speak>'
},
'voice':{
'languageCode':'en-us',
'name':'en-US-Standard-B',
'ssmlGender':'MALE'
},
'audioConfig':{
'audioEncoding':'MP3'
}
}";
But I get the following error:
Array ( [error] => Array ( [code] => 400 [message] => Invalid JSON
payload received. Unknown name "": Root element must be a message.
[status] => INVALID_ARGUMENT [details] => Array ( [0] => Array (
[#type] => type.googleapis.com/google.rpc.BadRequest [fieldViolations]
=> Array ( [0] => Array ( [description] => Invalid JSON payload received. Unknown name "": Root element must be a message. ) ) ) ) ) )
How to solve this?

Answer 1

Below my working example text-to-speech, you could redo for your needs:
public static function getSound($text)
{
$text = trim($text);
if($text == '') return false;
$params = [
"audioConfig"=>[
"audioEncoding"=>"LINEAR16",
"pitch"=> "1",
"speakingRate"=> "1",
"effectsProfileId"=> [
"medium-bluetooth-speaker-class-device"
]
],
"input"=>[
"text"=>$text
],
"voice"=>[
"languageCode"=> "en-US",
"name" =>"en-US-Wavenet-F"
]
];
$data_string = json_encode($params);
$url = 'https://texttospeech.googleapis.com/v1/text:synthesize?fields=audioContent&key=' . $speech_api_key;
$handle = curl_init($url);
curl_setopt($handle, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($handle, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);
curl_setopt($handle, CURLOPT_HTTPHEADER, [
'Content-Type: application/json',
'Content-Length: ' . strlen($data_string)
]
);
$response = curl_exec($handle);
$responseDecoded = json_decode($response, true);
curl_close($handle);
if($responseDecoded['audioContent']){
return $responseDecoded['audioContent'];
}
return false;
}
using:
public static function saveSound($text)
{
$speech_data = SpeechAPI::getSound($text);//see method upper
if($speech_data) {
$file_name = strtolower(md5(uniqid($text)) . '.mp3');
$path = FileUpload::getFolder();//just return directory path
if(file_put_contents($path.$file_name, base64_decode($speech_data))){
return $file_name;
}
}
return null;
}
For SSML standart need to change input params:
$text = "<speak>The <say-as interpret-as=\"characters\">SSML</say-as>
standard <break time=\"1s\"/>is defined by the
<sub alias=\"World Wide Web Consortium\">W3C</sub>.</speak>";
$params = [
"audioConfig"=>[
"audioEncoding"=>"LINEAR16",
"pitch"=> "1",
"speakingRate"=> "1",
"effectsProfileId"=> [
"medium-bluetooth-speaker-class-device"
]
],
"input"=>[
//"text"=>$text
"ssml" => $text
],
"voice"=>[
"languageCode"=> "en-US",
"name" =>"en-US-Wavenet-F"
]
];
about choose audioEncoding - https://cloud.google.com/speech-to-text/docs/encoding