php如何处理curl请求返回乱码_php设置正确字符集与响应头检测修复方法

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://example.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);

// 获取响应头中的 content-type
$contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);

// 提取字符集
$charset = 'UTF-8'; // 默认
if (preg_match('/charset=([^\s;]+)/i', $contentType, $matches)) {
    $charset = strtoupper($matches[1]);
}

// 转换为 UTF-8（如果原编码不是 UTF-8）
if ($charset !== 'UTF-8' && !empty($response)) {
    $response = mb_convert_encoding($response, 'UTF-8', $charset);
}

echo $response;
curl_close($ch);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://example.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true); // 包含响应头
$data = curl_exec($ch);

// 分离响应头和正文
list($header, $body) = explode("\r\n\r\n", $data, 2);

// 解析 header 中的 Content-Type
$lines = explode("\r\n", $header);
$charset = 'UTF-8';
foreach ($lines as $line) {
    if (stripos($line, 'Content-Type:') === 0) {
        if (preg_match('/charset=([^\s;]+)/i', $line, $matches)) {
            $charset = strtoupper($matches[1]);
            break;
        }
    }
}

if ($charset !== 'UTF-8') {
    $body = mb_convert_encoding($body, 'UTF-8', $charset);
}

echo $body;
curl_close($ch);

$encoding = mb_detect_encoding($body, ['UTF-8', 'GBK', 'GB2312', 'BIG5'], true);
if ($encoding) {
    $body = mb_convert_encoding($body, 'UTF-8', $encoding);
}