获取URL信息的类

使用这个类，你能获得URL的如下信息：

- Host 
- Path 
- Statuscode (eg. 404,200, ...) 
- HTTP Version 
- Server 
- Content Type 
- Date 
- The whole header string of the URL

<? 
/** 
* Class for getting information about URL's 
* @author    Sven Wagener <[email]sven.wagener@intertribe.de[/email]> 
* @copyright Intertribe limited 
* @PHP中文社区收集整理 [url]www.phpNet.cn[/url] 
* @include          Funktion:_include_ 
*/ 
class url{ 

  var $url=""; 
  var $url_host; 
  var $url_path; 
  var $file=""; 

  var $code=""; 
  var $code_desc=""; 
  var $http_version=""; // Variable for HTTP version 

  var $header_stream; 
  var $header_array; 

  var $timeout="1"; 

  /** 
  * Constructor of class url 
  * @param string        $url the complete url 
  * @desc Constructor of class url 
  */ 
  function url($url){ 
    $this->url=$url; 

    $url_array=parse_url($this->url); 
    $this->url_host=$url_array['host']; 
    $this->url_path=$url_array['path']; 

    if($this->url_path==""){ 
            $this->url_path="/"; 
    } 

    $this->refresh_headerinfo(); 
  } 

  /** 
  * Returns the whole url 
  * @return string $url the whole url 
  * @desc Returns the whole url 
  */ 
  function get_url(){ 
          return $this->url; 
  } 

  /** 
  * Returns the host of the url 
  * @return string $url_host the host of the url 
  * @desc Returns the host of the url 
  */ 
  function get_url_host(){ 
    return $this->url_host; 
  } 

  /** 
  * Returns the path of the url 
  * @return string $url_path the path of the url 
  * @desc Returns the path of the url 
  */ 
  function get_url_path(){ 
    return $this->url_path; 
  } 

  /** 
  * Returns the status code of the url 
  * @return string $status_code the status code 
  * @desc Returns the status code of the url 
  */ 
  function get_statuscode(){ 
    return $this->code; 
  } 

  /** 
  * Returns the status code description of the url 
  * @return string $status_code_desc the status code description 
  * @desc Returns the status code description of the url 
  */ 
  function get_statuscode_desc(){ 
    return $this->code_desc; 
  } 

  /** 
  * Returns the http version of the url by the returned headers of the server 
  * @return string $http_version the http version 
  * @desc Returns the http version of the url by the returned headers of the server 
  */ 
  function get_info_http_version(){ 
    return $this->http_version; 
  } 

  /** 
  * Returns the server type of the url's host by the returned headers of the server 
  * @return string header_array['Server'] the server type 
  * @desc Returns the server type of the url's host by the returned headers of the server 
  */ 
  function get_info_server(){ 
    return $this->header_array['Server']; 
  } 

  /** 
  * Returns the date of the url's host by the returned headers of the server 
  * @return string $header_array['Date'] the date 
  * @desc Returns the date of the url's host by the returned headers of the server 
  */ 
  function get_info_date(){ 
    return $this->header_array['Date']; 
  } 

  /* 
  function get_info_content_length(){ 
    return $this->header_array['Content-Length']; 
  } 
  */ 

  /** 
  * Returns the content type by the returned headers of the server 
  * @return string header_array['Content-Type'] the content type 
  * @desc Returns the content type by the returned headers of the server 
  */ 
  function get_info_content_type(){ 
    return $this->header_array['Content-Type']; 
  } 

  /** 
  * Returns the content of the url without the headers 
  * @return string $content the content 
  * @desc Returns the content of the url without the headers 
  */ 
  function get_content(){ 
    // Get a web page into a string 
    $string = implode ('', file ($this->url)); 
    return $string; 
  } 

  /** 
  * Returns the whole header of url without content 
  * @return string $header the header 
  * @desc Returns the whole header of url without content 
  */ 
  function get_header_stream(){ 
    return $this->header_stream; 
  } 

  /** 
  * Returns the whole headers of the url in an array 
  * @return array $header_array the headers in an array 
  * @desc Returns the whole headers of the url in an array 
  */ 
  function get_headers(){ 
    return $this->header_array; 
  } 

  /** 
  * Refreshes the header information 
  * @desc Refreshes the header information 
  */ 
  function refresh_headerinfo(){ 
    // Open socket for connection via port 80 to put headers 
    $fp = fsockopen ($this->url_host, 80, $errno, $errstr, 30); 
    if (!$fp) { 
      // echo "$errstr ($errno)"; 
      if($errno==0){ 
              $errstr="Server Not Found"; 
      } 
      $this->code=$errno; 
      $this->code_desc=$errstr; 
    } else { 

      $put_string="GET ".$this->url_path." HTTP/1.0rnHost: ".$this->url_host."rnrn"; 
      fputs ($fp, $put_string); 
      @socket_set_timeout($fp,$this->timeout); 

      $stream=""; 
      $this->header_array=""; 
      $header_end=false; 

      // Getting header string and creating header array 
      $i=0; 
      while (!feof($fp) && !$header_end) { 
        $line=fgets($fp,128); 
        if(strlen($line)==2){ 
          $header_end=true; 
        }else{ 
          if($i==0){ 
            $line1=$line; 
          } 
          $stream.=$line; 
          $splitted_line=split(":",$line); 
          $this->header_array[$splitted_line[0]]=$splitted_line[1]; 
          $i++; 
        } 
      } 
      fclose ($fp); 

      $this->header_stream=$stream; 

      $splitted_stream=split(" ",$line1); 

      // Getting status code and description of the URL 
      $this->code=$splitted_stream[1]; 
      $this->code_desc=$splitted_stream[2]; 
      if(count($splitted_stream)>3){ 
        for($i=3;$i<count($splitted_stream);$i++){ 
          $this->code_desc.=" ".$splitted_stream[$i]; 
        } 
      } 
      // Cleaning up for n and r 
      $this->code_desc=preg_replace("[\n]","",$this->code_desc); 
      $this->code_desc=preg_replace("[\r]","",$this->code_desc); 

      // Getting Http Version 
      $http_array=split("/",$splitted_stream[0]); 
      $this->http_version=$http_array[1]; 
      } 
  } 

  /** 
  * Sets the timeout for getting header data from server 
  * @param int $seconds time for timeout in seconds 
  * @desc Sets the timeout for getting header data from server 
  */ 
  function set_timeout($seconds){ 
    $this->timeout=$seconds; 
  } 
} 
?>

<?php  
include("url.class.php"); 
$url=new url("[url]http://www.phpNet.cn/[/url]"); 

echo $url->get_header_stream(); 
$headers=$url->get_headers(); 

echo $headers['Server']; 

echo $url->get_content(); 
echo "URL: <b>".$url->get_url()."</b><br>n"; 
echo "URL Host: ".$url->get_url_host()."<br>n"; 
echo "URL Path: ".$url->get_url_path()."<br>n<br>n"; 

echo "Statuscode: ".$url->get_statuscode()."<br>n"; 
echo "Statuscode description: ".$url->get_statuscode_desc()."<br>n"; 
echo "HTTP Version: ".$url->get_info_http_version()."<br>n"; 
echo "Server: ".$url->get_info_server()."<br>n"; 
echo "Content Type: ".$url->get_info_content_type()."<br>n"; 
echo "Date: ".$url->get_info_date()."<br>n<br>n"; 

echo "WHOLE HEADERS:<br>n"; 
echo $url->get_header_stream(); 
?>