奔向远方

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


< ?php
/**
* 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;
}
}
?>


调用代码：

< ?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: " . $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 ();
?>

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