weixin.php

<?php
//下面这行是为了过微信认证的，填写订阅号基本配置的时候需要填URL并验证消息，这时把下面这行取消注释即可。通过验证后可以删掉或继续注释。
//echo $_GET["echostr"];exit;

$xml_tree = simplexml_load_string(file_get_contents("php://input"));
$prompt .= $xml_tree->Content;
$touser = $xml_tree->FromUserName;

$isloaded = false;
$handle = @fopen(__DIR__ . "/loading.txt", "r");
if ($handle) {
  while (($buffer = fgets($handle)) !== false) {
    if (strpos($buffer, $prompt) !== false) {
      while (!$isloaded) {
        usleep(500000);
        fclose($handle);
        $isloaded = true;
        $handle = @fopen(__DIR__ . "/loading.txt", "r");
        while (($buffer = fgets($handle)) !== false) {
          if (strpos($buffer, $prompt) !== false) {
            $isloaded = false;
            break;
          }
        }
      }
    }
  }
  fclose($handle);
}

$text = "";
$handle = @fopen(__DIR__ . "/chat.txt", "r");
if ($handle) {
  while (($buffer = fgets($handle)) !== false) {
    if (strpos($buffer, "Q:" . $prompt) !== false) {
      while (($buffer = fgets($handle)) !== false) {
        if (strpos($buffer, "----------------") !== false) {
          fclose($handle);
          break;
        } else {
          $text .= $buffer;
        }
      }
?>
      <xml>
        <ToUserName>
          <![CDATA[<?= $touser ?>]]>
        </ToUserName>
        <FromUserName>
          <![CDATA[填公众号原始ID]]>
        </FromUserName>
        <CreateTime><?php echo time(); ?></CreateTime>
        <MsgType>
          <![CDATA[text]]>
        </MsgType>
        <Content>
          <![CDATA[<?= substr($text, 2, 2048) ?>]]>
        </Content>
        <FuncFlag>0<FuncFlag>
      </xml>
<?php
      exit;
    }
  }
  fclose($handle);
}

$handle = fopen(__DIR__ . "/loading.txt", "a") or die("Writing file failed.");
fwrite($handle, $prompt . "\n");
fclose($handle);


$OPENAI_API_KEY = "填OpenAI的API_KEY";
$ch = curl_init();
$headers  = [
  'Accept: application/json',
  'Content-Type: application/json',
  'Authorization: Bearer ' . $OPENAI_API_KEY . ''
];

$postData = [
  "model" => "gpt-3.5-turbo",
  "temperature" => 0,
  "messages" => [],
];
$postData['messages'][] = ['role' => 'user', 'content' => $prompt];
$postData = json_encode($postData);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_URL, 'https://api.openai.com/v1/chat/completions');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);

$result = curl_exec($ch);
$complete = json_decode($result);

if (isset($complete->choices[0]->message)) {
  $text = trim(str_replace("\\n", "\n", $complete->choices[0]->message->content), "\n");
} elseif (isset($complete->error->message)) {
  $text = "服务器返回错误信息：" . $complete->error->message;
} else {
  $text = "服务器超时或返回异常消息。";
}

$content = $_SERVER["REMOTE_ADDR"] . " | " . date("Y-m-d H:i:s") . "\n";
$content .= "Q:" . $prompt . "\nA:" . $text . "\n----------------\n";
$myfile = fopen(__DIR__ . "/chat.txt", "a") or die("Writing file failed.");
fwrite($myfile, $content);
fclose($myfile);

$content = "";
$handle = fopen(__DIR__ . "/loading.txt", "w") or die("Writing file failed.");
if ($handle) {
  while (($buffer = fgets($handle)) !== false) {
    if (strpos($buffer, $prompt . "\n") == false) {
      $content .= $buffer;
    }
  }
  fwrite($handle, $content);
  fclose($handle);
}

?>
<xml>
  <ToUserName>
    <![CDATA[<?= $touser ?>]]>
  </ToUserName>
  <FromUserName>
    <![CDATA[填公众号原始ID]]>
  </FromUserName>
  <CreateTime><?php echo time(); ?></CreateTime>
  <MsgType>
    <![CDATA[text]]>
  </MsgType>
  <Content><?= $text ?></Content>
  <FuncFlag>0<FuncFlag>
</xml>