php实现httpclient类示例

class httpClient {

 public $buffer = null;  // buffer 获取返回的字符串
 public $referer = null;  // referer 设置 HTTP_REFERER 的网址
 public $response = null; // response 服务器响应的 header 信息
 public $request = null;  // request 发送到服务器的 header 信息
 private $args = null;

 public static function init(&$instanceof, $args = array()) {
  return $instanceof = new self($args);
 }

 private function __construct($args = array()) {

  if(!is_array($args)) $args = array();
  $this->args = $args;
  if(!empty($this->args['debugging'])) {
   ob_end_clean();
   set_time_limit(0);
   header('Content-Type: text/plain; charset=utf-8');
  }

 }

 public function get($url, $data = null, $cookie = null) {

  $parse = parse_url($url);
  $url .= isset($parse['query']) ? '&'. $data : ( $data ? '?'. $data : '' );
  $host = $parse['host'];

  $header  = 'Host: '. $host. "\r\n";
  $header .= 'Connection: close'. "\r\n";
  $header .= 'Accept: */*'. "\r\n";
  $header .= 'User-Agent: '. ( isset($this->args['userAgent']) ? $this->args['userAgent'] : $_SERVER['HTTP_USER_AGENT'] ). "\r\n";
  $header .= 'DNT: 1'. "\r\n";
  if($cookie) $header .= 'Cookie: '. $cookie. "\r\n";
  if($this->referer) $header .= 'Referer: '. $this->referer. "\r\n";

  $options = array();
  $options['http']['method'] = 'GET';
  $options['http']['header'] = $header;

  $response = get_headers($url);
  $this->request = $header;
  $this->response = implode("\r\n", $response);
  $context = stream_context_create($options);
  return $this->buffer = file_get_contents($url, false, $context);

 }

 public function post($url, $data = null, $cookie = null) {

  $parse = parse_url($url);
  $host = $parse['host'];

  $header  = 'Host: '. $host. "\r\n";
  $header .= 'Connection: close'. "\r\n";
  $header .= 'Accept: */*'. "\r\n";
  $header .= 'User-Agent: '. ( isset($this->args['userAgent']) ? $this->args['userAgent'] : $_SERVER['HTTP_USER_AGENT'] ). "\r\n";
  $header .= 'Content-Type: application/x-www-form-urlencoded'. "\r\n";
  $header .= 'DNT: 1'. "\r\n";
  if($cookie) $header .= 'Cookie: '. $cookie. "\r\n";
  if($this->referer) $header .= 'Referer: '. $this->referer. "\r\n";
  if($data) $header .= 'Content-Length: '. strlen($data). "\r\n";

  $options = array();
  $options['http']['method'] = 'POST';
  $options['http']['header'] = $header;
  if($data) $options['http']['content'] = $data;

  $response = get_headers($url);
  $this->request = $header;
  $this->response = implode("\r\n", $response);
  $context = stream_context_create($options);
  return $this->buffer = file_get_contents($url, false, $context);

 }

}

httpClient::init($httpClient, array( 'debugging' => true , 'userAgent' => 'MSIE 15.0' ));
$httpClient->get('http://www.baidu.com', 'name=haowei');
echo $httpClient->request; // 获取 请求头部信息
echo $httpClient->response; // 获取 响应的头部信息
echo $httpClient->buffer; // 获取 网页内容

$httpClient->get('https://www.jb51.net/ServiceLogin/', 'hash='. $time, 'uid=1;users=admin;')

echo $httpClient->buffer;