百度AI千帆官方没有提供PHP代码，下面是自己写的PHP版本：

<?php

//error_reporting(0);

header('Content-type: application/json'); 

$ak = '自己的AK';

$sk = '自己的SK';

if (isset($_POST['info']) && trim($_POST['info']) !== '') {

$info = $_POST['info'];

$curl = curl_init();

curl_setopt($curl, CURLOPT_URL, 'https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id='.$ak.'&client_secret='.$sk);

curl_setopt($curl, CURLOPT_TIMEOUT,5);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

$data = curl_exec($curl);

curl_close($curl);

$response = json_decode($data, true);

if (json_last_error() !== JSON_ERROR_NONE || !isset($response['access_token']) || empty($response['access_token'])) {

echo json_encode('access_token');exit;

}

$accessToken = $response['access_token'];

$url = "https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/chat/completions_pro?access_token=" . urlencode($accessToken);

// 要发送的JSON数据

$jsonData = '{

"messages": [{

            "role": "user",

            "content": $info,

            "key": "1"

        }],

"temperature": 0.8,

"top_p": 0.8,

"penalty_score": 1,

"disable_search": false,

"enable_citation": false,

"collapsed": true

}';

// 初始化cURL会话

$curl = curl_init();

curl_setopt($curl, CURLOPT_URL, $url);

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

curl_setopt($curl, CURLOPT_POST, true);

curl_setopt($curl, CURLOPT_POSTFIELDS, $jsonData);

curl_setopt($curl, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);

curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); 

curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false); 

$response = curl_exec($curl);

//print_r($response);exit;

$response = json_decode($response, true);

if (json_last_error() !== JSON_ERROR_NONE || !isset($response['result']) || empty($response['result'])) {

echo json_encode('获取result失败');exit;

}else{

echo json_encode($response['result']);exit;

}

} 


其中$_POST['info']是提交的问题或者对话内容，$response['result']是接口返回的内容。