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
[复制此代码]CODE:

* @copyright Intertribe limited
* @PHP中文社区收集整理
www.phpNet.cn

* @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;$icode_desc.=" ".$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;
  }
}
?>


[复制此代码]CODE:
get_header_stream();
$headers=$url->get_headers();
echo $headers['Server'];
echo $url->get_content();
echo "URL: ".$url->get_url()."
n";
echo "URL Host: ".$url->get_url_host()."
n";
echo "URL Path: ".$url->get_url_path()."
n
n";
echo "Statuscode: ".$url->get_statuscode()."
n";
echo "Statuscode description: ".$url->get_statuscode_desc()."
n";
echo "HTTP Version: ".$url->get_info_http_version()."
n";
echo "Server: ".$url->get_info_server()."
n";
echo "Content Type: ".$url->get_info_content_type()."
n";
echo "Date: ".$url->get_info_date()."
n
n";
echo "WHOLE HEADERS:
n";
echo $url->get_header_stream();
?>