PHP对接阿里通义 AI 大模型，以SSE方式流式输出

首先要获取阿里云百炼的API KEY 和 模型id

具体PHP端代码如下：

//控制器端
public function questionAsk(Request $request)
    {


        $message = $request->input('message') ?? '';
        // 上一轮对话的id
        $session_id = $request->input('session_id') ?? '';

        if(empty($message)){
            return $this->failed('请输入问题');
        }
        $data = [
            'prompt' => $message
        ];
        if(!empty($session_id)){
            $data['session_id'] = $session_id;
        }
        $AliAiService = new AliAiService();

        $AliAiService->requestQuestion($data);
        flush();

    }

//AliAiService
<?php

namespace App\Http\Controllers\Plugin;

class AliAiService
{
    protected string $apiKey;
    protected string $application_id;
    public function __construct()
    {
        $this->apiKey = '你的 API-KEY ';
        $this->application_id = '你的模型id (deepseek或者其他模型)';
    }

    public function requestQuestion($data)
    {
        $application_id = $this->application_id;
        $app_key = $this->apiKey;
        //阿里百炼请求地址
        $app_url = "https://dashscope.aliyuncs.com/api/v1/apps/$application_id/completion";

        header('Content-Type: text/event-stream');
        header('Cache-Control: no-cache');
        header('X-Accel-Buffering: no');
        header('Connection: keep-alive');
        header('Access-Control-Allow-Origin: *');

        set_time_limit(0);
        ob_end_clean();
        ob_implicit_flush(1);

        $headers = [
            'Authorization: Bearer ' . $app_key,
            'Content-Type: application/json',
            'X-DashScope-SSE: enable'
        ];
        $params =  [
            'input' => $data,
            'parameters' => [
                'result_format'=>'message',
                'incremental_output'=>true
            ],
        ];

        $ch = curl_init($app_url);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($params));
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_TIMEOUT, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);//有时候希望返回的内容作为变量储存，而不是直接输出。这个时候就必需设置curl的CURLOPT_RETURNTRANSFER选项为1或true。
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);//设置这个选项为一个非零值(象 “Location: “)的头，服务器会把它当做HTTP头的一部分发送(注意这是递归的，PHP将发送形如 “Location: “的头)。
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);//curl_exec()获取的信息以文件流的形式返回，而不是直接输出
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($ch, CURLOPT_WRITEFUNCTION, function ($ch, $data) {
            $res = substr(explode("\n",$data)[3],5);
            $res = json_decode($res,true);
            if($res['output']){
//                echo $res['output']['text'];  
                echo "data: " . json_encode($res['output'])."\n\n";
                flush(); // 立即将输出发送到客户端
            }else{
                echo $res['message']. "\n\n";
                flush(); // 立即将输出发送到客户端
            }
            return strlen($data);
        });
        curl_exec($ch);
        curl_close($ch);
    }

}

前端收到的流式内容

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"null","text":"\u3002\u76f8\u4fe1\u81ea\u5df1\uff0c\u6bcf"}

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"null","text":"\u4e00\u6b65\u52aa\u529b\u90fd\u5c06\u4e3a"}

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"null","text":"\u5b9e\u73b0\u68a6\u60f3\u6dfb\u7816\u52a0\u74e6\u3002"}

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"null","text":"\u52a0\u6cb9\u5427\uff0c\u672a\u6765\u5c5e\u4e8e\u90a3\u4e9b"}

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"null","text":"\u6562\u4e8e\u8ffd\u68a6\u5e76\u4e3a\u4e4b"}

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"null","text":"\u4e0d\u61c8\u594b\u6597\u7684\u4eba\uff01"}

data: {"session_id":"36af37a95da04722a29191a7f2ae1d86","finish_reason":"stop","text":""}

前端处理流式内容

// 分割 SSE 事件（按 \n\n 分割）
    const events = buffer.split('\n\n');
    buffer = events.pop() || ''; // 保留未完成部分

    for (const event of events) {
    //找出data: 然后替换成空字符串，拿到json字符串后转成json对象 
      if (event.startsWith('data: ')) { 
        const jsonStr = event.replace('data: ', '').trim();
        try {
          const data = JSON.parse(jsonStr);
          console.log('收到数据:', data.text);
        } catch (err) {
          console.error('解析错误:', err);
        }
      }
    }

PHP 还有另一种写法 ，这两种都大同小异，基本上是一样的

		header('Content-Type: text/event-stream');
        header('Cache-Control: no-cache');
        header('X-Accel-Buffering: no');
        header('Connection: keep-alive');
        header('Access-Control-Allow-Origin: *');

        $api_key = '你的 API-KEY ';
        $application_id = '你的模型id (deepseek或者其他模型)';
        $api_url = "https://dashscope.aliyuncs.com/api/v1/apps/$application_id/completion";
        
        $message = $request->input('message') ?? '';
        if(empty($message)){
            return $this->failed('请输入问题');
        }

        $headers = [
            'Authorization: Bearer ' . $api_key,
            'Content-Type: application/json',
            'X-DashScope-SSE: enable'
        ];

        $params =  [
            'input' => [
                'prompt' => $message,
            ],
            'parameters' => [
                'result_format'=>'message',
                'incremental_output'=>true
            ],
        ];
        $callback = function($ch, $data) use ($log_id,$application_id){
            $res = substr(explode("\n",$data)[3],5);
            $res = json_decode($res,true);
            if($res['output']){
                echo "data: " . json_encode($res['output']) . "\n\n";
                ob_flush();flush();
            }
            return strlen($data);
        };



        $ch = curl_init();
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_URL, $api_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($params));
        curl_setopt($ch, CURLOPT_WRITEFUNCTION, $callback);
        curl_exec($ch);
        curl_close($ch);
        exit;