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;
}
?>