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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:
复制代码 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 "; 
           $out .= "Accept: */* "; 
           //$out .= "Referer: $boardurl "; 
           $out .= "Accept-Language: zh-cn "; 
           $out .= "Content-Type: application/x-www-form-urlencoded "; 
           $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT] "; 
           $out .= "Host: $host "; 
           $out .= "Content-Length: ".strlen($post)." "; 
           $out .= "Connection: Close "; 
           $out .= "Cache-Control: no-cache "; 
           $out .= "Cookie: $cookie "; 
           $out .= $post; 
       } else { 
           $out = "GET $path HTTP/1.0 "; 
           $out .= "Accept: */* "; 
           //$out .= "Referer: $boardurl "; 
           $out .= "Accept-Language: zh-cn "; 
           $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT] "; 
           $out .= "Host: $host "; 
           $out .= "Connection: Close "; 
           $out .= "Cookie: $cookie "; 
       } 
       $fp = fsockopen(($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 == " " ||  $h == " ")) 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:
复制代码 代码如下: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。