接入百度翻译API【PHP版】

PHP自建一个翻译API（采用百度开放接口），测试环境：Nginx 1.22.1 + PHP7.4/8.0

<?php
/**
 * @desc 百度文档翻译服务接口 
 * 计数服务接口校验同理，完整文档参考：https://fanyi-api.baidu.com/doc/21
 */
    header('Access-Control-Allow-Origin:*');
    header('Content-type: application/json');
    $word=isset($_GET['text'])? $_GET['text'] :null; 
    if(empty($word)){die("请传入text参数");}
    
    $des=isset($_GET['to'])? $_GET['to'] :null; 
    if(!empty($des)){
        $aim = $des;
    }else{
        if (preg_match("/([\x81-\xfe][\x40-\xfe])/", $word, $match)) {
            //含有汉字
            $aim = 'en';
        } else {
            //不含有汉字
            $aim = 'zh';
        }
    }
    $appid = 'APP ID'; //你自己的Appid
    $seckey = '密钥'; //你的密钥
    $salt = '1435660288'; //随机数，你也可以用10位时间戳
    $params = array(
        'appid' => $appid, 
        'from' => 'auto', 
        'to' => $aim,
        'salt' => $salt,
        'q' => $word, 
    );
    
    ksort($params);
    $querySign = '';  
    $params['sign'] = md5($appid.$word.$salt.$seckey);
    foreach ($params as $key => $value) {
        $querySign .= $key . '=' . $value . '&';
    }
    $url = 'http://fanyi-api.baidu.com/api/trans/vip/translate?';
    
    $header = array(
        'Content-Type' => 'application/x-www-form-urlencoded',
           );
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS,$querySign);
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_TIMEOUT, 10);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $result=curl_exec($ch);
    curl_close($ch);
    $callRet = json_decode($result, true);
    $src = $callRet['trans_result'][0]['src'];
    $dst = $callRet['trans_result'][0]['dst'];
    
    header("content-type: application/json");
    $json_return = array(
        "code" => '200',
        "src" => $src,
        "dst" => $dst
    );
    echo json_encode($json_return, JSON_UNESCAPED_UNICODE);
    
?>

接口文档：https://api.szfx.top/api/fanyi.html

实践案例：https://tool.szfx.top/fanyi

百度翻译开放平台：https://fanyi-api.baidu.com/

2022年8月1日起，通用翻译API标准版免费调用量调整为5万字符/月，高级版免费调用量调整为100万字符/月