PHP implements simple GET, POST, Cookie, Session and other functions

This article mainly introduces PHP to implement simple GET, POST, Cookie, Session and other functions. Interested friends can refer to it. I hope it will be helpful to everyone.

The example of this article describes the PHP encapsulated HttpClient class. The specific analysis is as follows:

This is a PHP encapsulated HttpClient class that can implement simple functions such as GET POST Cookie Session. I did it originally, but I revised it again in the past two days.

<?php 
/* 
 * Filename: httpclient.php 
 * Created on 2012-12-21 
 * Created by RobinTang 
 * To change the template for this generated file go to 
 * Window - Preferences - PHPeclipse - PHP - Code Templates 
 */ 
class SinCookie { 
  public $name; // Cookie名称 
  public $value; // Cookie值 
  // 下面三个属性现在未实现 
  public $expires; // 过期时间 
  public $path; // 路径 
  public $domain; // 域 
  // 从Cookie字符串创建一个Cookie对象 
  function __construct($s = false) { 
    if ($s) { 
      $i1 = strpos($s, &#39;=&#39;); 
      $i2 = strpos($s, &#39;;&#39;); 
      $this->name = trim(substr($s, 0, $i1)); 
      $this->value = trim(substr($s, $i1 +1, $i2 - $i1 -1)); 
    } 
  } 
  // 获取Cookie键值对 
  function getKeyValue() { 
    return "$this->name=$this->value"; 
  } 
} 
// 会话上下文 
class SinHttpContext { 
  public $cookies; // 会话Cookies 
  public $referer; // 前一个页面地址 
  function __construct() { 
    $this->cookies = array (); 
    $this->refrer = ""; 
  } 
  // 设置Cookie 
  function cookie($key, $val) { 
    $ck = new SinCookie(); 
    $ck->name = $key; 
    $ck->value = $val; 
    $this->addCookie($ck); 
  } 
  // 添加Cookie 
  function addCookie($ck) { 
    $this->cookies[$ck->name] = $ck; 
  } 
  // 获取Cookies字串，请求时用到 
  function cookiesString() { 
    $res = &#39;&#39;; 
    foreach ($this->cookies as $ck) { 
      $res .= $ck->getKeyValue() . &#39;;&#39;; 
    } 
    return $res; 
  } 
} 
// Http请求对象 
class SinHttpRequest { 
  public $url; // 请求地址 
  public $method = &#39;GET&#39;; // 请求方法 
  public $host; // 主机 
  public $path; // 路径 
  public $scheme; // 协议，http 
  public $port; // 端口 
  public $header; // 请求头 
  public $body; // 请求正文 
  // 设置头 
  function setHeader($k, $v) { 
    if (!isset ($this->header)) { 
      $this->header = array (); 
    } 
    $this->header[$k] = $v; 
  } 
  // 获取请求字符串 
  // 包含头和请求正文 
  // 获取之后直接写socket就行 
  function reqString() { 
    $matches = parse_url($this->url); 
    !isset ($matches[&#39;host&#39;]) && $matches[&#39;host&#39;] = &#39;&#39;; 
    !isset ($matches[&#39;path&#39;]) && $matches[&#39;path&#39;] = &#39;&#39;; 
    !isset ($matches[&#39;query&#39;]) && $matches[&#39;query&#39;] = &#39;&#39;; 
    !isset ($matches[&#39;port&#39;]) && $matches[&#39;port&#39;] = &#39;&#39;; 
    $host = $matches[&#39;host&#39;]; 
    $path = $matches[&#39;path&#39;] ? $matches[&#39;path&#39;] . ($matches[&#39;query&#39;] ? &#39;?&#39; . $matches[&#39;query&#39;] : &#39;&#39;) : &#39;/&#39;; 
    $port = !empty ($matches[&#39;port&#39;]) ? $matches[&#39;port&#39;] : 80; 
    $scheme = $matches[&#39;scheme&#39;] ? $matches[&#39;scheme&#39;] : &#39;http&#39;; 
    $this->host = $host; 
    $this->path = $path; 
    $this->scheme = $scheme; 
    $this->port = $port; 
    $method = strtoupper($this->method); 
    $res = "$method $path HTTP/1.1\r\n"; 
    $res .= "Host: $host\r\n"; 
    if ($this->header) { 
      reset($this->header); 
      while (list ($k, $v) = each($this->header)) { 
        if (isset ($v) && strlen($v) > 0) 
          $res .= "$k: $v\r\n"; 
      } 
    } 
    $res .= "\r\n"; 
    if ($this->body) { 
      $res .= $this->body; 
      $res .= "\r\n\r\n"; 
    } 
    return $res; 
  } 
} 
// Http响应 
class SinHttpResponse { 
  public $scheme; // 协议 
  public $stasus; // 状态，成功的时候是ok 
  public $code; // 状态码，成功的时候是200 
  public $header; // 响应头 
  public $body; // 响应正文 
  function __construct() { 
    $this->header = array (); 
    $this->body = null; 
  } 
  function setHeader($key, $val) { 
    $this->header[$key] = $val; 
  } 
} 
// HttpClient 
class SinHttpClient { 
  public $keepcontext = true; // 是否维持会话 
  public $context; // 上下文 
  public $request; // 请求 
  public $response; // 响应 
  public $debug = false;
  // 是否在Debug模式，
  //为true的时候会打印出请求内容和相同的头部 
  function __construct() { 
    $this->request = new SinHttpRequest(); 
    $this->response = new SinHttpResponse(); 
    $this->context = new SinHttpContext(); 
    $this->timeout = 15; // 默认的超时为15s 
  } 
  // 清除上一次的请求内容 
  function clearRequest() { 
    $this->request->body = &#39;&#39;; 
    $this->request->setHeader(&#39;Content-Length&#39;, false); 
    $this->request->setHeader(&#39;Content-Type&#39;, false); 
  } 
  // post方法 
  // data为请求的数据 
  // 为键值对的时候模拟表单提交 
  // 其他时候为数据提交，提交的形式为xml 
  // 如有其他需求，请自行扩展 
  function post($url, $data = false) { 
    $this->clearRequest(); 
    if ($data) { 
      if (is_array($data)) { 
        $con = http_build_query($data); 
        $this->request->setHeader(&#39;Content-Type&#39;, &#39;application/x-www-form-urlencoded&#39;); 
      } else { 
        $con = $data; 
        $this->request->setHeader(&#39;Content-Type&#39;, &#39;text/xml; charset=utf-8&#39;); 
      } 
      $this->request->body = $con; 
      $this->request->method = "POST"; 
      $this->request->setHeader(&#39;Content-Length&#39;, strlen($con)); 
    } 
    $this->startRequest($url); 
  } 
  // get方法 
  function get($url) { 
    $this->clearRequest(); 
    $this->request->method = "GET"; 
    $this->startRequest($url); 
  } 
  // 该方法为内部调用方法，不用直接调用 
  function startRequest($url) { 
    $this->request->url = $url; 
    if ($this->keepcontext) { 
      // 如果保存上下文的话设置相关信息 
      $this->request->setHeader(&#39;Referer&#39;, $this->context->refrer); 
      $cks = $this->context->cookiesString(); 
      if (strlen($cks) > 0) 
        $this->request->setHeader(&#39;Cookie&#39;, $cks); 
    } 
    // 获取请求内容 
    $reqstring = $this->request->reqString(); 
    if ($this->debug) 
      echo "Request:\n$reqstring\n"; 
    try { 
      $fp = fsockopen($this->request->host, $this->request->port, $errno, $errstr, $this->timeout); 
    } catch (Exception $ex) { 
      echo $ex->getMessage(); 
      exit (0); 
    } 
    if ($fp) { 
      stream_set_blocking($fp, true); 
      stream_set_timeout($fp, $this->timeout); 
      // 写数据 
      fwrite($fp, $reqstring); 
      $status = stream_get_meta_data($fp); 
      if (!$status[&#39;timed_out&#39;]) { //未超时 
        // 下面的循环用来读取响应头部 
        while (!feof($fp)) { 
          $h = fgets($fp); 
          if ($this->debug) 
            echo $h; 
          if ($h && ($h == "\r\n" || $h == "\n")) 
            break; 
          $pos = strpos($h, &#39;:&#39;); 
          if ($pos) { 
            $k = strtolower(trim(substr($h, 0, $pos))); 
            $v = trim(substr($h, $pos +1)); 
            if ($k == &#39;set-cookie&#39;) { 
              // 更新Cookie 
              if ($this->keepcontext) { 
                $this->context->addCookie(new SinCookie($v)); 
              } 
            } else { 
              // 添加到头里面去 
              $this->response->setHeader($k, $v); 
            } 
          } else { 
            // 第一行数据 
            // 解析响应状态 
            $preg = &#39;/^(\S*) (\S*) (.*)$/&#39;; 
            preg_match_all($preg, $h, $arr); 
            isset ($arr[1][0]) & $this->response->scheme = trim($arr[1][0]); 
            isset ($arr[2][0]) & $this->response->stasus = trim($arr[2][0]); 
            isset ($arr[3][0]) & $this->response->code = trim($arr[3][0]); 
          } 
        } 
        // 获取响应正文长度 
        $len = (int) $this->response->header[&#39;content-length&#39;]; 
        $res = &#39;&#39;; 
        // 下面的循环读取正文 
        while (!feof($fp) && $len > 0) { 
          $c = fread($fp, $len); 
          $res .= $c; 
          $len -= strlen($c); 
        } 
        $this->response->body = $res; 
      } 
      // 关闭Socket 
      fclose($fp); 
      // 把返回保存到上下文维持中 
      $this->context->refrer = $url; 
    } 
  } 
} 
// demo 
// now let begin test it 
$client = new SinHttpClient(); // create a client 
$client->get(&#39;http://www.baidu.com/&#39;);  // get 
echo $client->response->body; // echo 
?>

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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