ERNIE-Bot 4.0是百度最新发布的自研?语?模型，实现了基础模型的全面升级，在理解、生成、逻辑和记忆能力上都有着显著提升，支持5K输入+2K输出。本文介绍了千帆相关API及应用。

<?php
class Sample {
    const API_KEY = "0QUv2R****vr88hC";
    const SECRET_KEY = "lPOCLl****vk64Y1";

    public function run() {
        $curl = curl_init();
        curl_setopt_array($curl, array(
            CURLOPT_URL => "https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/chat/completions_pro?access_token={$this->getAccessToken()}",
            CURLOPT_TIMEOUT => 30,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_SSL_VERIFYPEER  => false,
            CURLOPT_SSL_VERIFYHOST  => false,
            CURLOPT_CUSTOMREQUEST => 'POST',
            
            CURLOPT_POSTFIELDS =>'{"temperature":0.95,"top_p":0.8,"penalty_score":1,"disable_search":false,"enable_citation":false}',
    
            CURLOPT_HTTPHEADER => array(
                'Content-Type: application/json'
            ),

        ));
        $response = curl_exec($curl);
        curl_close($curl);
        return $response;
    }
    
    /**
     * 使用 AK，SK 生成鉴权签名（Access Token）
     * @return string 鉴权签名信息（Access Token）
     */
    private function getAccessToken(){
        $curl = curl_init();
        $postData = array(
            'grant_type' => 'client_credentials',
            'client_id' => self::API_KEY,
            'client_secret' => self::SECRET_KEY
        );
        curl_setopt_array($curl, array(
            CURLOPT_URL => 'https://aip.baidubce.com/oauth/2.0/token',
            CURLOPT_CUSTOMREQUEST => 'POST',
            CURLOPT_SSL_VERIFYPEER  => false,
            CURLOPT_SSL_VERIFYHOST  => false,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POSTFIELDS => http_build_query($postData)
        ));
        $response = curl_exec($curl);
        curl_close($curl);
        $rtn = json_decode($response);
        return $rtn->access_token;
    }
}

$rtn = (new Sample())->run();
print_r($rtn);