voice.php

<?php

$key = parse_ini_file("api.ini",true)["docomo"]["key"];

if( isset($_GET["text"]) ){
    $text = $_GET["text"];
    $fname = "voice/".md5($text);

    // ローカルファイルが存在するか確認

    if( file_exists($fname) ){
        echo file_get_contents($fname);

    }else{
        $text = $_GET["text"];
        $apiUrl = "https://api.apigw.smt.docomo.ne.jp/voiceText/v1/textToSpeech?APIKEY=".$key;
        //echo $apiUrl;

        $header = [
            "Content-Type: application/x-www-form-urlencoded"
        ];
        $content = http_build_query([
            "text"=>$text,
            "speaker"=>"hikari"
        ]);
        $context = [
            "http"=>[
                "method"=>"POST",
                "header"=>implode("¥r¥n",$header),
                "content"=>$content
            ]
        ];

        $response = file_get_contents($apiUrl,false,stream_context_create($context));
        $contents = '<audio autoplay src="data:audio/wav;base64,'.base64_encode($response).'"/>';
        echo $contents;
        file_put_contents($fname,$contents);
    }


}