php实现httpRequest的方法

本文实例讲述了php实现httprequest的方法。分享给大家供大家参考。具体如下：

想从学校图书馆的网站上抓取数据处理之后在返回给浏览器，试了不少方法。首先试了http_request()，但是这个学院pecl_http支持，后来又试了网上流传甚广的class httprequest，可能是我不会使用，也失败了。后来看到了函数httprequest($url, $post='', $method='get', $limit=0, $returnheader=false, $cookie='', $bysocket=false, $ip='', $timeout=15, $block=true)，用它成功了，因此贴出来分享一下。函数代码如下：

<?php 
    /**
    * respose a http request
    *
    * @param string $url
    * @param array $post
    * @param string $method
    * @param bool $returnheader
    * @param string $cookie
    * @param bool $bysocket
    * @param string $ip
    * @param integer $timeout
    * @param bool $block
    * @return string response
    */ 
    function httprequest($url,$post='',$method='get',$limit=0,$returnheader=false,$cookie='',$bysocket=false,$ip='',$timeout=15,$block=true) { 
       $return = ''; 
       $matches = parse_url($url); 
       !isset($matches['host']) && $matches['host'] = ''; 
       !isset($matches['path']) && $matches['path'] = ''; 
       !isset($matches['query']) && $matches['query'] = ''; 
       !isset($matches['port']) && $matches['port'] = ''; 
       $host = $matches['host']; 
       $path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/'; 
       $port = !empty($matches['port']) ? $matches['port'] : 80; 
       if(strtolower($method) == 'post') { 
           $post = (is_array($post) and !empty($post)) ? http_build_query($post) : $post; 
           $out = "post $path http/1.0\r\n"; 
           $out .= "accept: */*\r\n"; 
           //$out .= "referer: $boardurl\r\n"; 
           $out .= "accept-language: zh-cn\r\n"; 
           $out .= "content-type: application/x-www-form-urlencoded\r\n"; 
           $out .= "user-agent: $_server[http_user_agent]\r\n"; 
           $out .= "host: $host\r\n"; 
           $out .= 'content-length: '.strlen($post)."\r\n"; 
           $out .= "connection: close\r\n"; 
           $out .= "cache-control: no-cache\r\n"; 
           $out .= "cookie: $cookie\r\n\r\n"; 
           $out .= $post; 
       } else { 
           $out = "get $path http/1.0\r\n"; 
           $out .= "accept: */*\r\n"; 
           //$out .= "referer: $boardurl\r\n"; 
           $out .= "accept-language: zh-cn\r\n"; 
           $out .= "user-agent: $_server[http_user_agent]\r\n"; 
           $out .= "host: $host\r\n"; 
           $out .= "connection: close\r\n"; 
           $out .= "cookie: $cookie\r\n\r\n"; 
       } 
       $fp = fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout); 
       if(!$fp) return ''; else { 
           $header = $content = ''; 
           stream_set_blocking($fp, $block); 
           stream_set_timeout($fp, $timeout); 
           fwrite($fp, $out); 
           $status = stream_get_meta_data($fp); 
           if(!$status['timed_out']) {//未超时 
               while (!feof($fp)) { 
                   $header .= $h = fgets($fp); 
                   if($h && ($h == "\r\n" ||  $h == "\n")) break; 
               } 
 
               $stop = false; 
               while(!feof($fp) && !$stop) { 
                   $data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit)); 
                   $content .= $data; 
                   if($limit) { 
                       $limit -= strlen($data); 
                       $stop = $limit <= 0; 
                   } 
               } 
           } 
        fclose($fp); 
           return $returnheader ? array($header,$content) : $content; 
       } 
    } 
?>

调用也很简单的。简单的例子：

echo httprequest('http://www.baidu.com');

希望本文所述对大家的php程序设计有所帮助。