我正在尝试使用cURL获取MIME Type和正文作为内容。在谷歌和Stackoverflow上检查后，我得到了多个代码，使此操作成功完成。但有一些混乱，选择最可靠，速度和单一的HTTP请求代码。
1.从这些代码中选择哪一个最好。或者我们可以做得更好
1.我想要一个代码，使单一请求网站example.com
1.哪种代码适合从外部网站获取大量内容

代码1：

function file_get_contents_curl($url_curl) {
    $agent = $_SERVER['HTTP_USER_AGENT'];
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
    curl_setopt($ch, CURLOPT_HEADER, 1); // include headers in response
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $url_curl);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);   
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_USERAGENT, $agent);   

    // Get the content type and content
    $response_curl = curl_exec($ch);
    $header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
    $data_curl = substr($response_curl, $header_size);

    // Set the content type header (MIME Type)
    header('Content-Type:' . $content_type);

    curl_close($ch);

    return $data_curl;
}

//full page 

$homepage = file_get_contents_curl("https://example.com");
echo $homepage;

代码2：

function file_get_contents_curl($url_curl){
    $agent_curl = $_SERVER['HTTP_USER_AGENT'];

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_AUTOREFERER, true);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $url_curl);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_USERAGENT, $agent_curl);

    $data_curl = curl_exec($ch);
    $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);

    curl_close($ch);

    return compact('data_curl', 'content_type');
}

$data_webpage = file_get_contents_curl("https://example.com");
$homepage = $data_webpage['data_curl'];
$content_type = $data_webpage['content_type'];
header('Content-Type:'.$content_type);
echo $homepage;

代码3：

function file_get_contents_curl($url) {
    $agent = $_SERVER['HTTP_USER_AGENT'];
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);   
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_USERAGENT, $agent);   
    curl_setopt($ch, CURLOPT_VERBOSE, true);

    // Get the content type
    curl_setopt($ch, CURLOPT_NOBODY, 1);
    curl_exec($ch);
    $content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);

    // Get the content
    curl_setopt($ch, CURLOPT_NOBODY, 0);
    $data = curl_exec($ch);
    curl_close($ch);

    // Set the content type header
    header('Content-Type:' . $content_type);

    return $data;
}

$homepage = file_get_contents_curl("https://example.com");
echo $homepage;