?? url.php
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<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2004, Richard Heyes |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard at php net> |
// +-----------------------------------------------------------------------+
//
// $Id: URL.php,v 1.36 2004/06/19 18:58:50 richard Exp $
//
// Net_URL Class
class Net_URL
{
/**
* Full url
* @var string
*/
var $url;
/**
* Protocol
* @var string
*/
var $protocol;
/**
* Username
* @var string
*/
var $username;
/**
* Password
* @var string
*/
var $password;
/**
* Host
* @var string
*/
var $host;
/**
* Port
* @var integer
*/
var $port;
/**
* Path
* @var string
*/
var $path;
/**
* Query string
* @var array
*/
var $querystring;
/**
* Anchor
* @var string
*/
var $anchor;
/**
* Whether to use []
* @var bool
*/
var $useBrackets;
/**
* PHP4 Constructor
*
* @see __construct()
*/
function Net_URL($url = null, $useBrackets = true)
{
$this->__construct($url, $useBrackets);
}
/**
* PHP5 Constructor
*
* Parses the given url and stores the various parts
* Defaults are used in certain cases
*
* @param string $url Optional URL
* @param bool $useBrackets Whether to use square brackets when
* multiple querystrings with the same name
* exist
*/
function __construct($url = null, $useBrackets = true)
{
$HTTP_SERVER_VARS = !empty($_SERVER) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
$this->useBrackets = $useBrackets;
$this->url = $url;
$this->user = '';
$this->pass = '';
$this->host = '';
$this->port = 80;
$this->path = '';
$this->querystring = array();
$this->anchor = '';
// Only use defaults if not an absolute URL given
if (!preg_match('/^[a-z0-9]+:\/\//i', $url)) {
$this->protocol = (@$HTTP_SERVER_VARS['HTTPS'] == 'on' ? 'https' : 'http');
/**
* Figure out host/port
*/
if (!empty($HTTP_SERVER_VARS['HTTP_HOST']) AND preg_match('/^(.*)(:([0-9]+))?$/U', $HTTP_SERVER_VARS['HTTP_HOST'], $matches)) {
$host = $matches[1];
if (!empty($matches[3])) {
$port = $matches[3];
} else {
$port = $this->getStandardPort($this->protocol);
}
}
$this->user = '';
$this->pass = '';
$this->host = !empty($host) ? $host : (isset($HTTP_SERVER_VARS['SERVER_NAME']) ? $HTTP_SERVER_VARS['SERVER_NAME'] : 'localhost');
$this->port = !empty($port) ? $port : (isset($HTTP_SERVER_VARS['SERVER_PORT']) ? $HTTP_SERVER_VARS['SERVER_PORT'] : $this->getStandardPort($this->protocol));
$this->path = !empty($HTTP_SERVER_VARS['PHP_SELF']) ? $HTTP_SERVER_VARS['PHP_SELF'] : '/';
$this->querystring = isset($HTTP_SERVER_VARS['QUERY_STRING']) ? $this->_parseRawQuerystring($HTTP_SERVER_VARS['QUERY_STRING']) : null;
$this->anchor = '';
}
// Parse the url and store the various parts
if (!empty($url)) {
$urlinfo = parse_url($url);
// Default querystring
$this->querystring = array();
foreach ($urlinfo as $key => $value) {
switch ($key) {
case 'scheme':
$this->protocol = $value;
$this->port = $this->getStandardPort($value);
break;
case 'user':
case 'pass':
case 'host':
case 'port':
$this->$key = $value;
break;
case 'path':
if ($value{0} == '/') {
$this->path = $value;
} else {
$path = dirname($this->path) == DIRECTORY_SEPARATOR ? '' : dirname($this->path);
$this->path = sprintf('%s/%s', $path, $value);
}
break;
case 'query':
$this->querystring = $this->_parseRawQueryString($value);
break;
case 'fragment':
$this->anchor = $value;
break;
}
}
}
}
/**
* Returns full url
*
* @return string Full url
* @access public
*/
function getURL()
{
$querystring = $this->getQueryString();
$this->url = $this->protocol . '://'
. $this->user . (!empty($this->pass) ? ':' : '')
. $this->pass . (!empty($this->user) ? '@' : '')
. $this->host . ($this->port == $this->getStandardPort($this->protocol) ? '' : ':' . $this->port)
. $this->path
. (!empty($querystring) ? '?' . $querystring : '')
. (!empty($this->anchor) ? '#' . $this->anchor : '');
return $this->url;
}
/**
* Adds a querystring item
*
* @param string $name Name of item
* @param string $value Value of item
* @param bool $preencoded Whether value is urlencoded or not, default = not
* @access public
*/
function addQueryString($name, $value, $preencoded = false)
{
if ($preencoded) {
$this->querystring[$name] = $value;
} else {
$this->querystring[$name] = is_array($value) ? array_map('rawurlencode', $value): rawurlencode($value);
}
}
/**
* Removes a querystring item
*
* @param string $name Name of item
* @access public
*/
function removeQueryString($name)
{
if (isset($this->querystring[$name])) {
unset($this->querystring[$name]);
}
}
/**
* Sets the querystring to literally what you supply
*
* @param string $querystring The querystring data. Should be of the format foo=bar&x=y etc
* @access public
*/
function addRawQueryString($querystring)
{
$this->querystring = $this->_parseRawQueryString($querystring);
}
/**
* Returns flat querystring
*
* @return string Querystring
* @access public
*/
function getQueryString()
{
if (!empty($this->querystring)) {
foreach ($this->querystring as $name => $value) {
if (is_array($value)) {
foreach ($value as $k => $v) {
$querystring[] = $this->useBrackets ? sprintf('%s[%s]=%s', $name, $k, $v) : ($name . '=' . $v);
}
} elseif (!is_null($value)) {
$querystring[] = $name . '=' . $value;
} else {
$querystring[] = $name;
}
}
$querystring = implode(ini_get('arg_separator.output'), $querystring);
} else {
$querystring = '';
}
return $querystring;
}
/**
* Parses raw querystring and returns an array of it
*
* @param string $querystring The querystring to parse
* @return array An array of the querystring data
* @access private
*/
function _parseRawQuerystring($querystring)
{
$parts = preg_split('/[' . preg_quote(ini_get('arg_separator.input'), '/') . ']/', $querystring, -1, PREG_SPLIT_NO_EMPTY);
$return = array();
foreach ($parts as $part) {
if (strpos($part, '=') !== false) {
$value = substr($part, strpos($part, '=') + 1);
$key = substr($part, 0, strpos($part, '='));
} else {
$value = null;
$key = $part;
}
if (substr($key, -2) == '[]') {
$key = substr($key, 0, -2);
if (@!is_array($return[$key])) {
$return[$key] = array();
$return[$key][] = $value;
} else {
$return[$key][] = $value;
}
} elseif (!$this->useBrackets AND !empty($return[$key])) {
$return[$key] = (array)$return[$key];
$return[$key][] = $value;
} else {
$return[$key] = $value;
}
}
return $return;
}
/**
* Resolves //, ../ and ./ from a path and returns
* the result. Eg:
*
* /foo/bar/../boo.php => /foo/boo.php
* /foo/bar/../../boo.php => /boo.php
* /foo/bar/.././/boo.php => /foo/boo.php
*
* This method can also be called statically.
*
* @param string $url URL path to resolve
* @return string The result
*/
function resolvePath($path)
{
$path = explode('/', str_replace('//', '/', $path));
for ($i=0; $i<count($path); $i++) {
if ($path[$i] == '.') {
unset($path[$i]);
$path = array_values($path);
$i--;
} elseif ($path[$i] == '..' AND ($i > 1 OR ($i == 1 AND $path[0] != '') ) ) {
unset($path[$i]);
unset($path[$i-1]);
$path = array_values($path);
$i -= 2;
} elseif ($path[$i] == '..' AND $i == 1 AND $path[0] == '') {
unset($path[$i]);
$path = array_values($path);
$i--;
} else {
continue;
}
}
return implode('/', $path);
}
/**
* Returns the standard port number for a protocol
*
* @param string $scheme The protocol to lookup
* @return integer Port number or NULL if no scheme matches
*
* @author Philippe Jausions <Philippe.Jausions@11abacus.com>
*/
function getStandardPort($scheme)
{
switch (strtolower($scheme)) {
case 'http': return 80;
case 'https': return 443;
case 'ftp': return 21;
case 'imap': return 143;
case 'imaps': return 993;
case 'pop3': return 110;
case 'pop3s': return 995;
default: return null;
}
}
/**
* Forces the URL to a particular protocol
*
* @param string $protocol Protocol to force the URL to
* @param integer $port Optional port (standard port is used by default)
*/
function setProtocol($protocol, $port = null)
{
$this->protocol = $protocol;
$this->port = is_null($port) ? $this->getStandardPort() : $port;
}
}
?>
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