php调用deepseek 接口示例

 

<?php
class DeepSeekClient {private $apiKey;private $apiUrl = 'https://api.deepseek.com/chat/completions';private $model = 'deepseek-chat';public function __construct($apiKey) {$this->apiKey = $apiKey;}/*** 发送普通请求*/public function chat($messages, $options = []) {$defaultOptions = ['max_tokens' => 1000,'temperature' => 0.7,'stream' => false];$options = array_merge($defaultOptions, $options);$data = ['model' => $this->model,'messages' => $messages] + $options;$ch = curl_init($this->apiUrl);curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true,CURLOPT_POST => true,CURLOPT_POSTFIELDS => json_encode($data),CURLOPT_HTTPHEADER => ['Content-Type: application/json','Authorization: Bearer ' . $this->apiKey,'Accept: application/json'],CURLOPT_TIMEOUT => 60,CURLOPT_SSL_VERIFYPEER => false, // 禁用 SSL 验证CURLOPT_SSL_VERIFYHOST => 0,     // 禁用主机名验证
        ]);$response = curl_exec($ch);$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);if (curl_errno($ch)) {throw new Exception('cURL 错误: ' . curl_error($ch));}curl_close($ch);if ($httpCode != 200) {throw new Exception('API 请求失败，HTTP 代码: ' . $httpCode . ' 响应: ' . $response);}return json_decode($response, true);}/*** 流式聊天*/public function streamChat($messages, $callback, $options = []) {$defaultOptions = ['max_tokens' => 1000,'temperature' => 0.7,'stream' => true];$options = array_merge($defaultOptions, $options);$data = ['model' => $this->model,'messages' => $messages] + $options;$ch = curl_init();curl_setopt_array($ch, [CURLOPT_URL => $this->apiUrl,CURLOPT_RETURNTRANSFER => true,CURLOPT_POST => true,CURLOPT_POSTFIELDS => json_encode($data),CURLOPT_HTTPHEADER => ['Content-Type: application/json','Authorization: Bearer ' . $this->apiKey,'Accept: text/event-stream'],CURLOPT_WRITEFUNCTION => function($ch, $data) use ($callback) {$lines = explode("\n", $data);foreach ($lines as $line) {if (strpos($line, 'data: ') === 0) {$jsonStr = substr($line, 6);if ($jsonStr === '[DONE]') {$callback('', true); // 传输完成} else if (!empty(trim($jsonStr))) {$json = json_decode($jsonStr, true);if (isset($json['choices'][0]['delta']['content'])) {$callback($json['choices'][0]['delta']['content'], false);}}}}return strlen($data);}]);curl_exec($ch);if (curl_errno($ch)) {throw new Exception('cURL 错误: ' . curl_error($ch));}curl_close($ch);}
}// 使用示例
try {$apiKey = 'sk-********';$client = new DeepSeekClient($apiKey);// 普通聊天$messages = [['role' => 'system', 'content' => '你是一个中文助手'],['role' => 'user', 'content' => '请用中文介绍一下你自己']];$response = $client->chat($messages);echo "回答: " . $response['choices'][0]['message']['content'] . PHP_EOL;// 流式聊天echo "流式响应: ";$client->streamChat($messages, function($content, $done) {if (!$done) {echo $content;flush();} else {echo PHP_EOL . "--- 结束 ---" . PHP_EOL;}});} catch (Exception $e) {echo "错误: " . $e->getMessage() . PHP_EOL;
}
?>