??php
// 初始化一个 cURL 对象
$curl = curl_init();

// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'https://www.111cn.net');

// 设置header
curl_setopt($curl, CURLOPT_HEADER, 1);

// 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

// 运行cURL，请求网页
$data = curl_exec($curl);

// 关闭URL请求
curl_close($curl);

// 显示获得的数据
var_dump($data);
?>

print("

HTTP

// open a file using http protocol
if(!($myFile = fopen("https://www.111cn.net/", "r")))
{
print("file could not be opened");
exit;
}

while(!feof($myFile))
{
// read a line from the file
$myLine = fgetss($myFile, 255);
print("$myLine
n");
}

// close the file
fclose($myFile);

print("

FTP

// open a file using ftp protocol
if(!($myFile = fopen("ftp://ftp.php.net/welcome.msg", "r")))
{
print("file could not be opened");
exit;
}

while(!feof($myFile))
{
// read a line from the file
$myLine = fgetss($myFile, 255);
print("$myLine
n");
}

// close the file
fclose($myFile);

print("

Local

// open a local file
if(!($myFile = fopen("data.txt", "r")))
{
print("file could not be opened");
exit;
}

while(!feof($myFile))
{
// read a line from the file
$myLine = fgetss($myFile, 255);
print("$myLine
n");
}

// close the file
fclose($myFile);
?>

?php

file_get_contents('https://www.111cn.net/');

?>

class HTTPRequest
{
var $_fp; // HTTP socket
var $_url; // full URL
var $_host; // HTTP host
var $_protocol; // protocol (HTTP/HTTPS)
var $_uri; // request URI
var $_port; // port

// scan url
function _scan_url()
{
$req = $this->_url;

$pos = strpos($req, '://');
$this->_protocol = strtolower(substr($req, 0, $pos));

$req = substr($req, $pos+3);
$pos = strpos($req, '/');
if($pos === false)
$pos = strlen($req);
$host = substr($req, 0, $pos);

if(strpos($host, ':') !== false)
{
list($this->_host, $this->_port) = explode(':', $host);
}
else
{
$this->_host = $host;
$this->_port = ($this->_protocol == 'https') ? 443 : 80;
}

$this->_uri = substr($req, $pos);
if($this->_uri == '')
$this->_uri = '/';
}

// constructor
function HTTPRequest($url)
{
$this->_url = $url;
$this->_scan_url();
}

// download URL to string
function DownloadToString()
{
$crlf = "rn";

// generate request
$req = 'GET ' . $this->_uri . ' HTTP/1.0' . $crlf
. 'Host: ' . $this->_host . $crlf
. $crlf;

// fetch
$this->_fp = fsockopen(($this->_protocol == 'https' ? 'ssl://' : '') . $this->_host, $this->_port);
fwrite($this->_fp, $req);
while(is_resource($this->_fp) && $this->_fp && !feof($this->_fp))
$response .= fread($this->_fp, 1024);
fclose($this->_fp);

// split header and body
$pos = strpos($response, $crlf . $crlf);
if($pos === false)
return($response);
$header = substr($response, 0, $pos);
$body = substr($response, $pos + 2 * strlen($crlf));

// parse headers
$headers = array();
$lines = explode($crlf, $header);
foreach($lines as $line)
if(($pos = strpos($line, ':')) !== false)
$headers[strtolower(trim(substr($line, 0, $pos)))] = trim(substr($line, $pos+1));

// redirection?
if(isset($headers['location']))
{
$http = new HTTPRequest($headers['location']);
return($http->DownloadToString($http));
}
else
{
return($body);
}
}
}
//使用方法
$r = new HTTPRequest('https://www.111cn.net');
$str=$r->DownloadToString();

?>