如何高效管理腾讯云COS文件？使用Composer与qcloud/cos-sdk-v5轻松搞定！

<code class="bash">composer require qcloud/cos-sdk-v5</code>

<pre class="brush:php;toolbar:false;">// 在你的项目入口文件（例如 index.php 或 bootstrap.php）中
require __DIR__ . '/vendor/autoload.php';

// 现在，你可以直接使用COS SDK的类了！

<pre class="brush:php;toolbar:false;">use Qcloud\Cos\Client;

$secretId = 'YOUR_SECRET_ID'; // 替换为你的SecretId
$secretKey = 'YOUR_SECRET_KEY'; // 替换为你的SecretKey
$region = 'ap-beijing'; // 替换为你的存储桶所在区域，例如 ap-guangzhou, ap-shanghai

$cosClient = new Client(array(
    'region' => $region,
    'credentials' => array(
        'secretId' => $secretId,
        'secretKey' => $secretKey,
        // 'token' => 'YOUR_TEMPORARY_TOKEN' // 如果使用临时密钥，需要提供token
    )
));

$bucket = 'your-bucket-name-1250000000'; // 替换为你的存储桶名称，格式为 {name}-{appid}

<pre class="brush:php;toolbar:false;">// 示例：上传本地文件
$localFilePath = '/path/to/your/local/image.jpg';
$key = 'images/uploaded_image.jpg'; // 在COS中的对象键（文件路径）

try {
    $result = $cosClient->Upload(
        $bucket,
        $key,
        fopen($localFilePath, 'rb') // 使用文件流上传
    );
    echo "文件上传成功！ETag: " . $result['ETag'] . "\n";
    print_r($result);
} catch (\Exception $e) {
    echo "文件上传失败：" . $e->getMessage() . "\n";
}

// 示例：上传字符串内容
$key = 'text/hello.txt';
$body = 'Hello, Composer and COS SDK!';
try {
    $result = $cosClient->Upload($bucket, $key, $body);
    echo "字符串上传成功！ETag: " . $result['ETag'] . "\n";
} catch (\Exception $e) {
    echo "字符串上传失败：" . $e->getMessage() . "\n";
}

<pre class="brush:php;toolbar:false;">// 示例：下载文件到内存
$keyToDownload = 'images/uploaded_image.jpg';
try {
    $result = $cosClient->getObject(array(
        'Bucket' => $bucket,
        'Key' => $keyToDownload
    ));
    // echo "文件内容：" . $result['Body'] . "\n"; // 如果是文本文件可以直接输出
    echo "文件下载到内存成功，内容长度: " . strlen($result['Body']) . "\n";
} catch (\Exception $e) {
    echo "下载到内存失败：" . $e->getMessage() . "\n";
}

// 示例：下载文件到本地路径
$localSavePath = '/path/to/save/downloaded_image.jpg';
try {
    $result = $cosClient->getObject(array(
        'Bucket' => $bucket,
        'Key' => $keyToDownload,
        'SaveAs' => $localSavePath
    ));
    echo "文件下载到本地成功：" . $localSavePath . "\n";
} catch (\Exception $e) {
    echo "下载到本地失败：" . $e->getMessage() . "\n";
}

// 示例：获取文件下载URL
try {
    $signedUrl = $cosClient->getObjectUrl($bucket, $keyToDownload, '+10 minutes'); // 生成10分钟有效的签名URL
    echo "文件下载URL：" . $signedUrl . "\n";
} catch (\Exception $e) {
    echo "获取下载URL失败：" . $e->getMessage() . "\n";
}