1397 lines
42 KiB
PHP
1397 lines
42 KiB
PHP
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<?php
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/**
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* IRI parser/serialiser/normaliser
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*
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* Copyright (c) 2007-2009, Geoffrey Sneddon and Steve Minutillo.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* * Neither the name of the SimplePie Team nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package IRI
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* @author Geoffrey Sneddon
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* @author Steve Minutillo
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* @copyright 2007-2009 Geoffrey Sneddon and Steve Minutillo
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* @license http://www.opensource.org/licenses/bsd-license.php
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* @link http://hg.gsnedders.com/iri/
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*
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* @todo Per-scheme validation
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*/
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class IRI
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{
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/**
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* Scheme
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*
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* @var string
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*/
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private $scheme;
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/**
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* User Information
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*
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* @var string
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*/
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private $iuserinfo;
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/**
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* ihost
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*
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* @var string
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*/
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private $ihost;
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/**
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* Port
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*
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* @var string
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*/
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private $port;
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/**
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* ipath
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*
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* @var string
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*/
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private $ipath;
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/**
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* iquery
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*
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* @var string
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*/
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private $iquery;
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/**
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* ifragment
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*
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* @var string
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*/
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private $ifragment;
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/**
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* Normalization database
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*
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* Each key is the scheme, each value is an array with each key as the IRI
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* part and value as the default value for that part.
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*/
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private $normalization = array(
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'acap' => array(
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'port' => 674
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),
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'dict' => array(
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'port' => 2628
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),
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'file' => array(
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'ihost' => 'localhost'
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),
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'http' => array(
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'port' => 80,
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'ipath' => '/'
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),
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'https' => array(
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'port' => 443,
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'ipath' => '/'
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),
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);
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/**
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* Return the entire IRI when you try and read the object as a string
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*
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* @return string
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*/
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public function __toString()
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{
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return $this->iri;
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}
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/**
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* Overload __set() to provide access via properties
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*
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* @param string $name Property name
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* @param mixed $value Property value
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* @return void
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*/
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public function __set($name, $value)
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{
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if (method_exists($this, 'set_' . $name))
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{
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call_user_func(array($this, 'set_' . $name), $value);
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}
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elseif (
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$name === 'iauthority'
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|| $name === 'iuserinfo'
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|| $name === 'ihost'
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|| $name === 'ipath'
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|| $name === 'iquery'
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|| $name === 'ifragment'
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)
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{
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call_user_func(array($this, 'set_' . substr($name, 1)), $value);
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}
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}
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/**
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* Overload __get() to provide access via properties
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*
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* @param string $name Property name
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* @return mixed
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*/
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public function __get($name)
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{
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if (!$this->is_valid())
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{
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return false;
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}
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elseif (method_exists($this, 'get_' . $name))
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{
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$return = call_user_func(array($this, 'get_' . $name));
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}
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elseif (isset($this->$name))
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{
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$return = $this->$name;
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}
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else
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{
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trigger_error('Undefined property: ' . get_class($this) . '::' . $name, E_USER_NOTICE);
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$return = null;
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}
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if ($return === null && isset($this->normalization[$this->scheme][$name]))
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{
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return $this->normalization[$this->scheme][$name];
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}
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else
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{
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return $return;
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}
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}
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/**
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* Overload __isset() to provide access via properties
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*
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* @param string $name Property name
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* @return bool
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*/
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public function __isset($name)
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{
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if (method_exists($this, 'get_' . $name) || isset($this->$name))
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/**
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* Overload __unset() to provide access via properties
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*
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* @param string $name Property name
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* @param mixed $value Property value
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* @return void
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*/
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public function __unset($name)
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{
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if (method_exists($this, 'set_' . $name))
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{
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call_user_func(array($this, 'set_' . $name), '');
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}
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}
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/**
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* Create a new IRI object, from a specified string
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*
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* @param string $iri
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* @return IRI
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*/
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public function __construct($iri = null)
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{
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$this->set_iri($iri);
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}
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/**
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* Create a new IRI object by resolving a relative IRI
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*
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* Returns false if $base is not absolute, otherwise an IRI.
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*
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* @param IRI $base (Absolute) Base IRI
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* @param IRI|string $relative Relative IRI
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* @return IRI|false
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*/
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public static function absolutize(IRI $base, $relative)
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{
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if (!($relative instanceof IRI))
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{
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$relative = new IRI($relative);
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}
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if ($base->scheme !== null)
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{
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if ($relative->iri !== '' && $relative->iri !== null)
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{
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if ($relative->scheme !== null)
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{
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$target = clone $relative;
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}
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elseif ($relative->iauthority !== null)
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{
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$target = clone $relative;
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$target->scheme = $base->scheme;
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}
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else
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{
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$target = new IRI;
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$target->scheme = $base->scheme;
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$target->iuserinfo = $base->iuserinfo;
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$target->ihost = $base->ihost;
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$target->port = $base->port;
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if ($relative->ipath !== '')
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{
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if ($relative->ipath[0] === '/')
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{
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$target->ipath = $relative->ipath;
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}
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elseif (($base->iuserinfo !== null || $base->ihost !== null || $base->port !== null) && $base->ipath === null)
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{
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$target->ipath = '/' . $relative->ipath;
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}
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elseif (($last_segment = strrpos($base->ipath, '/')) !== false)
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{
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$target->ipath = substr($base->ipath, 0, $last_segment + 1) . $relative->ipath;
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}
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else
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{
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$target->ipath = $relative->ipath;
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}
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$target->ipath = $target->remove_dot_segments($target->ipath);
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$target->iquery = $relative->iquery;
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}
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else
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{
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$target->ipath = $base->ipath;
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if ($relative->iquery !== null)
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{
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$target->iquery = $relative->iquery;
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}
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elseif ($base->iquery !== null)
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{
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$target->iquery = $base->iquery;
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}
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}
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$target->ifragment = $relative->ifragment;
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}
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}
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else
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{
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$target = clone $base;
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$target->ifragment = null;
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}
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$target->scheme_normalization();
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return $target;
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}
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else
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{
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return false;
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}
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|
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}
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|
|
|
||
|
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/**
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* Create a new IRI object by creating a relative IRI from two IRIs
|
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*
|
||
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* @param IRI $base Base IRI
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* @param IRI $destination Destination IRI
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* @return IRI
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*/
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public static function build_relative(IRI $base, IRI $destination)
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{
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}
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|
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|
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/**
|
||
|
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* Parse an IRI into scheme/authority/path/query/fragment segments
|
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*
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* @param string $iri
|
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* @return array
|
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|
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*/
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private function parse_iri($iri)
|
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{
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$iri = trim($iri, "\x20\x09\x0A\x0C\x0D");
|
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|
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static $cache = array();
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|
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if (isset($cache[$iri]))
|
||
|
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{
|
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|
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return $cache[$iri];
|
||
|
|
}
|
||
|
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elseif ($iri === '')
|
||
|
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{
|
||
|
|
return $cache[$iri] = array(
|
||
|
|
'scheme' => null,
|
||
|
|
'authority' => null,
|
||
|
|
'path' => '',
|
||
|
|
'query' => null,
|
||
|
|
'fragment' => null
|
||
|
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);
|
||
|
|
}
|
||
|
|
elseif (preg_match('/^((?P<scheme>[^:\/?#]+):)?(\/\/(?P<authority>[^\/?#]*))?(?P<path>[^?#]*)(\?(?P<query>[^#]*))?(#(?P<fragment>.*))?$/', $iri, $match))
|
||
|
|
{
|
||
|
|
if (!isset($match[1]) || $match[1] === '')
|
||
|
|
{
|
||
|
|
$match['scheme'] = null;
|
||
|
|
}
|
||
|
|
if (!isset($match[3]) || $match[3] === '')
|
||
|
|
{
|
||
|
|
$match['authority'] = null;
|
||
|
|
}
|
||
|
|
if (!isset($match[5]) || $match[5] === '')
|
||
|
|
{
|
||
|
|
$match['path'] = '';
|
||
|
|
}
|
||
|
|
if (!isset($match[6]) || $match[6] === '')
|
||
|
|
{
|
||
|
|
$match['query'] = null;
|
||
|
|
}
|
||
|
|
if (!isset($match[8]) || $match[8] === '')
|
||
|
|
{
|
||
|
|
$match['fragment'] = null;
|
||
|
|
}
|
||
|
|
return $cache[$iri] = $match;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Remove dot segments from a path
|
||
|
|
*
|
||
|
|
* @param string $input
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function remove_dot_segments($input)
|
||
|
|
{
|
||
|
|
$output = '';
|
||
|
|
while (strpos($input, './') !== false || strpos($input, '/.') !== false || $input === '.' || $input === '..')
|
||
|
|
{
|
||
|
|
// A: If the input buffer begins with a prefix of "../" or "./", then remove that prefix from the input buffer; otherwise,
|
||
|
|
if (strpos($input, '../') === 0)
|
||
|
|
{
|
||
|
|
$input = substr($input, 3);
|
||
|
|
}
|
||
|
|
elseif (strpos($input, './') === 0)
|
||
|
|
{
|
||
|
|
$input = substr($input, 2);
|
||
|
|
}
|
||
|
|
// B: if the input buffer begins with a prefix of "/./" or "/.", where "." is a complete path segment, then replace that prefix with "/" in the input buffer; otherwise,
|
||
|
|
elseif (strpos($input, '/./') === 0)
|
||
|
|
{
|
||
|
|
$input = substr_replace($input, '/', 0, 3);
|
||
|
|
}
|
||
|
|
elseif ($input === '/.')
|
||
|
|
{
|
||
|
|
$input = '/';
|
||
|
|
}
|
||
|
|
// C: if the input buffer begins with a prefix of "/../" or "/..", where ".." is a complete path segment, then replace that prefix with "/" in the input buffer and remove the last segment and its preceding "/" (if any) from the output buffer; otherwise,
|
||
|
|
elseif (strpos($input, '/../') === 0)
|
||
|
|
{
|
||
|
|
$input = substr_replace($input, '/', 0, 4);
|
||
|
|
$output = substr_replace($output, '', strrpos($output, '/'));
|
||
|
|
}
|
||
|
|
elseif ($input === '/..')
|
||
|
|
{
|
||
|
|
$input = '/';
|
||
|
|
$output = substr_replace($output, '', strrpos($output, '/'));
|
||
|
|
}
|
||
|
|
// D: if the input buffer consists only of "." or "..", then remove that from the input buffer; otherwise,
|
||
|
|
elseif ($input === '.' || $input === '..')
|
||
|
|
{
|
||
|
|
$input = '';
|
||
|
|
}
|
||
|
|
// E: move the first path segment in the input buffer to the end of the output buffer, including the initial "/" character (if any) and any subsequent characters up to, but not including, the next "/" character or the end of the input buffer
|
||
|
|
elseif (($pos = strpos($input, '/', 1)) !== false)
|
||
|
|
{
|
||
|
|
$output .= substr($input, 0, $pos);
|
||
|
|
$input = substr_replace($input, '', 0, $pos);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$output .= $input;
|
||
|
|
$input = '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $output . $input;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Replace invalid character with percent encoding
|
||
|
|
*
|
||
|
|
* @param string $string Input string
|
||
|
|
* @param string $extra_chars Valid characters not in iunreserved or
|
||
|
|
* iprivate (this is ASCII-only)
|
||
|
|
* @param bool $iprivate Allow iprivate
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function replace_invalid_with_pct_encoding($string, $extra_chars, $iprivate = false)
|
||
|
|
{
|
||
|
|
// Replace invalid percent characters
|
||
|
|
$string = preg_replace('/%($|[^A-Fa-f0-9]|[A-Fa-f0-9][^A-Fa-f0-9])/', '%25\1', $string);
|
||
|
|
|
||
|
|
// Normalize as many pct-encoded sections as possible
|
||
|
|
$string = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array(&$this, 'remove_iunreserved_percent_encoded'), $string);
|
||
|
|
|
||
|
|
// Add unreserved and % to $extra_chars (the latter is safe because all
|
||
|
|
// pct-encoded sections are now valid).
|
||
|
|
$extra_chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~%';
|
||
|
|
|
||
|
|
// Now replace any bytes that aren't allowed with their pct-encoded versions
|
||
|
|
$position = 0;
|
||
|
|
$strlen = strlen($string);
|
||
|
|
while (($position += strspn($string, $extra_chars, $position)) < $strlen)
|
||
|
|
{
|
||
|
|
$value = ord($string[$position]);
|
||
|
|
|
||
|
|
// Start position
|
||
|
|
$start = $position;
|
||
|
|
|
||
|
|
// By default we are valid
|
||
|
|
$valid = true;
|
||
|
|
|
||
|
|
// No one byte sequences are valid due to the while.
|
||
|
|
// Two byte sequence:
|
||
|
|
if (($value & 0xE0) === 0xC0)
|
||
|
|
{
|
||
|
|
$character = ($value & 0x1F) << 6;
|
||
|
|
$length = 2;
|
||
|
|
$remaining = 1;
|
||
|
|
}
|
||
|
|
// Three byte sequence:
|
||
|
|
elseif (($value & 0xF0) === 0xE0)
|
||
|
|
{
|
||
|
|
$character = ($value & 0x0F) << 12;
|
||
|
|
$length = 3;
|
||
|
|
$remaining = 2;
|
||
|
|
}
|
||
|
|
// Four byte sequence:
|
||
|
|
elseif (($value & 0xF8) === 0xF0)
|
||
|
|
{
|
||
|
|
$character = ($value & 0x07) << 18;
|
||
|
|
$length = 4;
|
||
|
|
$remaining = 3;
|
||
|
|
}
|
||
|
|
// Invalid byte:
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$valid = false;
|
||
|
|
$length = 1;
|
||
|
|
$remaining = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($remaining)
|
||
|
|
{
|
||
|
|
if ($position + $length <= $strlen)
|
||
|
|
{
|
||
|
|
for ($position++; $remaining; $position++)
|
||
|
|
{
|
||
|
|
$value = ord($string[$position]);
|
||
|
|
|
||
|
|
// Check that the byte is valid, then add it to the character:
|
||
|
|
if (($value & 0xC0) === 0x80)
|
||
|
|
{
|
||
|
|
$character |= ($value & 0x3F) << (--$remaining * 6);
|
||
|
|
}
|
||
|
|
// If it is invalid, count the sequence as invalid and reprocess the current byte:
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$valid = false;
|
||
|
|
$position--;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$position = $strlen - 1;
|
||
|
|
$valid = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Percent encode anything invalid or not in ucschar
|
||
|
|
if (
|
||
|
|
// Invalid sequences
|
||
|
|
!$valid
|
||
|
|
// Non-shortest form sequences are invalid
|
||
|
|
|| $length > 1 && $character <= 0x7F
|
||
|
|
|| $length > 2 && $character <= 0x7FF
|
||
|
|
|| $length > 3 && $character <= 0xFFFF
|
||
|
|
// Outside of range of ucschar codepoints
|
||
|
|
// Noncharacters
|
||
|
|
|| ($character & 0xFFFE) === 0xFFFE
|
||
|
|
|| $character >= 0xFDD0 && $character <= 0xFDEF
|
||
|
|
|| (
|
||
|
|
// Everything else not in ucschar
|
||
|
|
$character > 0xD7FF && $character < 0xF900
|
||
|
|
|| $character < 0xA0
|
||
|
|
|| $character > 0xEFFFD
|
||
|
|
)
|
||
|
|
&& (
|
||
|
|
// Everything not in iprivate, if it applies
|
||
|
|
!$iprivate
|
||
|
|
|| $character < 0xE000
|
||
|
|
|| $character > 0x10FFFD
|
||
|
|
)
|
||
|
|
)
|
||
|
|
{
|
||
|
|
// If we were a character, pretend we weren't, but rather an error.
|
||
|
|
if ($valid)
|
||
|
|
$position--;
|
||
|
|
|
||
|
|
for ($j = $start; $j <= $position; $j++)
|
||
|
|
{
|
||
|
|
$string = substr_replace($string, sprintf('%%%02X', ord($string[$j])), $j, 1);
|
||
|
|
$j += 2;
|
||
|
|
$position += 2;
|
||
|
|
$strlen += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $string;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Callback function for preg_replace_callback.
|
||
|
|
*
|
||
|
|
* Removes sequences of percent encoded bytes that represent UTF-8
|
||
|
|
* encoded characters in iunreserved
|
||
|
|
*
|
||
|
|
* @param array $match PCRE match
|
||
|
|
* @return string Replacement
|
||
|
|
*/
|
||
|
|
private function remove_iunreserved_percent_encoded($match)
|
||
|
|
{
|
||
|
|
// As we just have valid percent encoded sequences we can just explode
|
||
|
|
// and ignore the first member of the returned array (an empty string).
|
||
|
|
$bytes = explode('%', $match[0]);
|
||
|
|
|
||
|
|
// Initialize the new string (this is what will be returned) and that
|
||
|
|
// there are no bytes remaining in the current sequence (unsurprising
|
||
|
|
// at the first byte!).
|
||
|
|
$string = '';
|
||
|
|
$remaining = 0;
|
||
|
|
|
||
|
|
// Loop over each and every byte, and set $value to its value
|
||
|
|
for ($i = 1, $len = count($bytes); $i < $len; $i++)
|
||
|
|
{
|
||
|
|
$value = hexdec($bytes[$i]);
|
||
|
|
|
||
|
|
// If we're the first byte of sequence:
|
||
|
|
if (!$remaining)
|
||
|
|
{
|
||
|
|
// Start position
|
||
|
|
$start = $i;
|
||
|
|
|
||
|
|
// By default we are valid
|
||
|
|
$valid = true;
|
||
|
|
|
||
|
|
// One byte sequence:
|
||
|
|
if ($value <= 0x7F)
|
||
|
|
{
|
||
|
|
$character = $value;
|
||
|
|
$length = 1;
|
||
|
|
}
|
||
|
|
// Two byte sequence:
|
||
|
|
elseif (($value & 0xE0) === 0xC0)
|
||
|
|
{
|
||
|
|
$character = ($value & 0x1F) << 6;
|
||
|
|
$length = 2;
|
||
|
|
$remaining = 1;
|
||
|
|
}
|
||
|
|
// Three byte sequence:
|
||
|
|
elseif (($value & 0xF0) === 0xE0)
|
||
|
|
{
|
||
|
|
$character = ($value & 0x0F) << 12;
|
||
|
|
$length = 3;
|
||
|
|
$remaining = 2;
|
||
|
|
}
|
||
|
|
// Four byte sequence:
|
||
|
|
elseif (($value & 0xF8) === 0xF0)
|
||
|
|
{
|
||
|
|
$character = ($value & 0x07) << 18;
|
||
|
|
$length = 4;
|
||
|
|
$remaining = 3;
|
||
|
|
}
|
||
|
|
// Invalid byte:
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$valid = false;
|
||
|
|
$remaining = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Continuation byte:
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// Check that the byte is valid, then add it to the character:
|
||
|
|
if (($value & 0xC0) === 0x80)
|
||
|
|
{
|
||
|
|
$remaining--;
|
||
|
|
$character |= ($value & 0x3F) << ($remaining * 6);
|
||
|
|
}
|
||
|
|
// If it is invalid, count the sequence as invalid and reprocess the current byte as the start of a sequence:
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$valid = false;
|
||
|
|
$remaining = 0;
|
||
|
|
$i--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If we've reached the end of the current byte sequence, append it to Unicode::$data
|
||
|
|
if (!$remaining)
|
||
|
|
{
|
||
|
|
// Percent encode anything invalid or not in iunreserved
|
||
|
|
if (
|
||
|
|
// Invalid sequences
|
||
|
|
!$valid
|
||
|
|
// Non-shortest form sequences are invalid
|
||
|
|
|| $length > 1 && $character <= 0x7F
|
||
|
|
|| $length > 2 && $character <= 0x7FF
|
||
|
|
|| $length > 3 && $character <= 0xFFFF
|
||
|
|
// Outside of range of iunreserved codepoints
|
||
|
|
|| $character < 0x2D
|
||
|
|
|| $character > 0xEFFFD
|
||
|
|
// Noncharacters
|
||
|
|
|| ($character & 0xFFFE) === 0xFFFE
|
||
|
|
|| $character >= 0xFDD0 && $character <= 0xFDEF
|
||
|
|
// Everything else not in iunreserved (this is all BMP)
|
||
|
|
|| $character === 0x2F
|
||
|
|
|| $character > 0x39 && $character < 0x41
|
||
|
|
|| $character > 0x5A && $character < 0x61
|
||
|
|
|| $character > 0x7A && $character < 0x7E
|
||
|
|
|| $character > 0x7E && $character < 0xA0
|
||
|
|
|| $character > 0xD7FF && $character < 0xF900
|
||
|
|
)
|
||
|
|
{
|
||
|
|
for ($j = $start; $j <= $i; $j++)
|
||
|
|
{
|
||
|
|
$string .= '%' . strtoupper($bytes[$j]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
for ($j = $start; $j <= $i; $j++)
|
||
|
|
{
|
||
|
|
$string .= chr(hexdec($bytes[$j]));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If we have any bytes left over they are invalid (i.e., we are
|
||
|
|
// mid-way through a multi-byte sequence)
|
||
|
|
if ($remaining)
|
||
|
|
{
|
||
|
|
for ($j = $start; $j < $len; $j++)
|
||
|
|
{
|
||
|
|
$string .= '%' . strtoupper($bytes[$j]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $string;
|
||
|
|
}
|
||
|
|
|
||
|
|
private function scheme_normalization()
|
||
|
|
{
|
||
|
|
if (isset($this->normalization[$this->scheme]['iuserinfo']) && $this->iuserinfo === $this->normalization[$this->scheme]['iuserinfo'])
|
||
|
|
{
|
||
|
|
$this->iuserinfo = null;
|
||
|
|
}
|
||
|
|
if (isset($this->normalization[$this->scheme]['ihost']) && $this->ihost === $this->normalization[$this->scheme]['ihost'])
|
||
|
|
{
|
||
|
|
$this->ihost = null;
|
||
|
|
}
|
||
|
|
if (isset($this->normalization[$this->scheme]['port']) && $this->port === $this->normalization[$this->scheme]['port'])
|
||
|
|
{
|
||
|
|
$this->port = null;
|
||
|
|
}
|
||
|
|
if (isset($this->normalization[$this->scheme]['ipath']) && $this->ipath === $this->normalization[$this->scheme]['ipath'])
|
||
|
|
{
|
||
|
|
$this->ipath = null;
|
||
|
|
}
|
||
|
|
if (isset($this->normalization[$this->scheme]['iquery']) && $this->iquery === $this->normalization[$this->scheme]['iquery'])
|
||
|
|
{
|
||
|
|
$this->iquery = null;
|
||
|
|
}
|
||
|
|
if (isset($this->normalization[$this->scheme]['ifragment']) && $this->ifragment === $this->normalization[$this->scheme]['ifragment'])
|
||
|
|
{
|
||
|
|
$this->ifragment = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check if the object represents a valid IRI. This needs to be done on each
|
||
|
|
* call as some things change depending on another part of the IRI.
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
public function is_valid()
|
||
|
|
{
|
||
|
|
if ($this->ipath !== null && (
|
||
|
|
substr($this->ipath, 0, 2) === '//' && $this->get_iauthority() === null
|
||
|
|
|| substr($this->ipath, 0, 1) !== '/' && $this->ipath !== '' && $this->get_iauthority() !== null
|
||
|
|
|| strpos($this->ipath, ':') !== false && (strpos($this->ipath, '/') === false ? true : strpos($this->ipath, ':') < strpos($this->ipath, '/')) && $this->scheme === null && $this->get_iauthority() === null
|
||
|
|
)
|
||
|
|
)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the entire IRI. Returns true on success, false on failure (if there
|
||
|
|
* are any invalid characters).
|
||
|
|
*
|
||
|
|
* @param string $iri
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_iri($iri)
|
||
|
|
{
|
||
|
|
if ($iri !== null)
|
||
|
|
{
|
||
|
|
$parsed = $this->parse_iri((string) $iri);
|
||
|
|
|
||
|
|
return $this->set_scheme($parsed['scheme'])
|
||
|
|
&& $this->set_authority($parsed['authority'])
|
||
|
|
&& $this->set_path($parsed['path'])
|
||
|
|
&& $this->set_query($parsed['query'])
|
||
|
|
&& $this->set_fragment($parsed['fragment']);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the scheme. Returns true on success, false on failure (if there are
|
||
|
|
* any invalid characters).
|
||
|
|
*
|
||
|
|
* @param string $scheme
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_scheme($scheme)
|
||
|
|
{
|
||
|
|
if ($scheme === null)
|
||
|
|
{
|
||
|
|
$this->scheme = null;
|
||
|
|
}
|
||
|
|
elseif (
|
||
|
|
!($scheme = (string) $scheme)
|
||
|
|
|| !isset($scheme[0])
|
||
|
|
|| $scheme[0] < 'A'
|
||
|
|
|| $scheme[0] > 'Z' && $scheme[0] < 'a'
|
||
|
|
|| $scheme[0] > 'z'
|
||
|
|
|| strspn($scheme, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-.') !== strlen($scheme)
|
||
|
|
)
|
||
|
|
{
|
||
|
|
$this->scheme = null;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->scheme = strtolower($scheme);
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the authority. Returns true on success, false on failure (if there are
|
||
|
|
* any invalid characters).
|
||
|
|
*
|
||
|
|
* @param string $authority
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_authority($authority)
|
||
|
|
{
|
||
|
|
if (($iuserinfo_end = strrpos($authority, '@')) !== false)
|
||
|
|
{
|
||
|
|
$iuserinfo = substr($authority, 0, $iuserinfo_end);
|
||
|
|
$authority = substr($authority, $iuserinfo_end + 1);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$iuserinfo = null;
|
||
|
|
}
|
||
|
|
if (($port_start = strpos($authority, ':', strpos($authority, ']'))) !== false)
|
||
|
|
{
|
||
|
|
if (($port = substr($authority, $port_start + 1)) === false)
|
||
|
|
{
|
||
|
|
$port = null;
|
||
|
|
}
|
||
|
|
$authority = substr($authority, 0, $port_start);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$port = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->set_userinfo($iuserinfo) && $this->set_host($authority) && $this->set_port($port);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the iuserinfo.
|
||
|
|
*
|
||
|
|
* @param string $iuserinfo
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_userinfo($iuserinfo)
|
||
|
|
{
|
||
|
|
if ($iuserinfo === null)
|
||
|
|
{
|
||
|
|
$this->iuserinfo = null;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->iuserinfo = $this->replace_invalid_with_pct_encoding($iuserinfo, '!$&\'()*+,;=:');
|
||
|
|
$this->scheme_normalization();
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the ihost. Returns true on success, false on failure (if there are
|
||
|
|
* any invalid characters).
|
||
|
|
*
|
||
|
|
* @param string $ihost
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_host($ihost)
|
||
|
|
{
|
||
|
|
if ($ihost === null)
|
||
|
|
{
|
||
|
|
$this->ihost = null;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
elseif (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']')
|
||
|
|
{
|
||
|
|
if (Net_IPv6::check_ipv6(substr($ihost, 1, -1)))
|
||
|
|
{
|
||
|
|
$this->ihost = '[' . Net_IPv6::compress(substr($ihost, 1, -1)) . ']';
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->ihost = null;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;=');
|
||
|
|
|
||
|
|
// Lowercase, but ignore pct-encoded sections (as they should
|
||
|
|
// remain uppercase). This must be done after the previous step
|
||
|
|
// as that can add unescaped characters.
|
||
|
|
$position = 0;
|
||
|
|
$strlen = strlen($ihost);
|
||
|
|
while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen)
|
||
|
|
{
|
||
|
|
if ($ihost[$position] === '%')
|
||
|
|
{
|
||
|
|
$position += 3;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$ihost[$position] = strtolower($ihost[$position]);
|
||
|
|
$position++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->ihost = $ihost;
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->scheme_normalization();
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the port. Returns true on success, false on failure (if there are
|
||
|
|
* any invalid characters).
|
||
|
|
*
|
||
|
|
* @param string $port
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_port($port)
|
||
|
|
{
|
||
|
|
if ($port === null)
|
||
|
|
{
|
||
|
|
$this->port = null;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
elseif (strspn($port, '0123456789') === strlen($port))
|
||
|
|
{
|
||
|
|
$this->port = (int) $port;
|
||
|
|
$this->scheme_normalization();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->port = null;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the ipath.
|
||
|
|
*
|
||
|
|
* @param string $ipath
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_path($ipath)
|
||
|
|
{
|
||
|
|
if ($ipath === null)
|
||
|
|
{
|
||
|
|
$this->ipath = null;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$ipath = explode('/', $ipath);
|
||
|
|
$this->ipath = '';
|
||
|
|
foreach ($ipath as $segment)
|
||
|
|
{
|
||
|
|
$this->ipath .= $this->replace_invalid_with_pct_encoding($segment, '!$&\'()*+,;=@:');
|
||
|
|
$this->ipath .= '/';
|
||
|
|
}
|
||
|
|
$this->ipath = substr($this->ipath, 0, -1);
|
||
|
|
if ($this->scheme !== null)
|
||
|
|
{
|
||
|
|
$this->ipath = $this->remove_dot_segments($this->ipath);
|
||
|
|
}
|
||
|
|
$this->scheme_normalization();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the iquery.
|
||
|
|
*
|
||
|
|
* @param string $iquery
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_query($iquery)
|
||
|
|
{
|
||
|
|
if ($iquery === null)
|
||
|
|
{
|
||
|
|
$this->iquery = null;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->iquery = $this->replace_invalid_with_pct_encoding($iquery, '!$&\'()*+,;=:@/?', true);
|
||
|
|
$this->scheme_normalization();
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the ifragment.
|
||
|
|
*
|
||
|
|
* @param string $ifragment
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
private function set_fragment($ifragment)
|
||
|
|
{
|
||
|
|
if ($ifragment === null)
|
||
|
|
{
|
||
|
|
$this->ifragment = null;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->ifragment = $this->replace_invalid_with_pct_encoding($ifragment, '!$&\'()*+,;=:@/?');
|
||
|
|
$this->scheme_normalization();
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Convert an IRI to a URI (or parts thereof)
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function to_uri($string)
|
||
|
|
{
|
||
|
|
static $non_ascii = "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff";
|
||
|
|
|
||
|
|
$position = 0;
|
||
|
|
$strlen = strlen($string);
|
||
|
|
while (($position += strcspn($string, $non_ascii, $position)) < $strlen)
|
||
|
|
{
|
||
|
|
$string = substr_replace($string, sprintf('%%%02X', ord($string[$position])), $position, 1);
|
||
|
|
$position += 3;
|
||
|
|
$strlen += 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $string;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the complete IRI
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function get_iri()
|
||
|
|
{
|
||
|
|
$iri = '';
|
||
|
|
$defined = false;
|
||
|
|
if ($this->scheme !== null)
|
||
|
|
{
|
||
|
|
$iri .= $this->scheme . ':';
|
||
|
|
}
|
||
|
|
if (($iauthority = $this->iauthority) !== null)
|
||
|
|
{
|
||
|
|
$iri .= '//' . $iauthority;
|
||
|
|
}
|
||
|
|
if ($this->ipath !== null)
|
||
|
|
{
|
||
|
|
$iri .= $this->ipath;
|
||
|
|
$defined = true;
|
||
|
|
}
|
||
|
|
if ($this->iquery !== null)
|
||
|
|
{
|
||
|
|
$iri .= '?' . $this->iquery;
|
||
|
|
}
|
||
|
|
if ($this->ifragment !== null)
|
||
|
|
{
|
||
|
|
$iri .= '#' . $this->ifragment;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($iri !== '' || $defined)
|
||
|
|
{
|
||
|
|
return $iri;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the complete URI
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function get_uri()
|
||
|
|
{
|
||
|
|
$iri = $this->iri;
|
||
|
|
if (is_string($iri))
|
||
|
|
return $this->to_uri($iri);
|
||
|
|
else
|
||
|
|
return $iri;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the complete iauthority
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function get_iauthority()
|
||
|
|
{
|
||
|
|
$iauthority = '';
|
||
|
|
if ($this->iuserinfo !== null)
|
||
|
|
{
|
||
|
|
$iauthority .= $this->iuserinfo . '@';
|
||
|
|
}
|
||
|
|
if ($this->ihost !== null)
|
||
|
|
{
|
||
|
|
$iauthority .= $this->ihost;
|
||
|
|
}
|
||
|
|
if ($this->port !== null)
|
||
|
|
{
|
||
|
|
$iauthority .= ':' . $this->port;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->iuserinfo !== null || $this->ihost !== null || $this->port !== null)
|
||
|
|
{
|
||
|
|
return $iauthority;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the complete authority
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
private function get_authority()
|
||
|
|
{
|
||
|
|
$iauthority = $this->iauthority;
|
||
|
|
if (is_string($iauthority))
|
||
|
|
return $this->to_uri($iauthority);
|
||
|
|
else
|
||
|
|
return $iauthority;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Class to validate and to work with IPv6 addresses.
|
||
|
|
*
|
||
|
|
* This was originally based on the PEAR class of the same name, but has been
|
||
|
|
* almost entirely rewritten.
|
||
|
|
*/
|
||
|
|
class Net_IPv6
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* Uncompresses an IPv6 address
|
||
|
|
*
|
||
|
|
* RFC 4291 allows you to compress concecutive zero pieces in an address to
|
||
|
|
* '::'. This method expects a valid IPv6 address and expands the '::' to
|
||
|
|
* the required number of zero pieces.
|
||
|
|
*
|
||
|
|
* Example: FF01::101 -> FF01:0:0:0:0:0:0:101
|
||
|
|
* ::1 -> 0:0:0:0:0:0:0:1
|
||
|
|
*
|
||
|
|
* @author Alexander Merz <alexander.merz@web.de>
|
||
|
|
* @author elfrink at introweb dot nl
|
||
|
|
* @author Josh Peck <jmp at joshpeck dot org>
|
||
|
|
* @copyright 2003-2005 The PHP Group
|
||
|
|
* @license http://www.opensource.org/licenses/bsd-license.php
|
||
|
|
* @param string $ip An IPv6 address
|
||
|
|
* @return string The uncompressed IPv6 address
|
||
|
|
*/
|
||
|
|
public static function uncompress($ip)
|
||
|
|
{
|
||
|
|
$c1 = -1;
|
||
|
|
$c2 = -1;
|
||
|
|
if (substr_count($ip, '::') === 1)
|
||
|
|
{
|
||
|
|
list($ip1, $ip2) = explode('::', $ip);
|
||
|
|
if ($ip1 === '')
|
||
|
|
{
|
||
|
|
$c1 = -1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$c1 = substr_count($ip1, ':');
|
||
|
|
}
|
||
|
|
if ($ip2 === '')
|
||
|
|
{
|
||
|
|
$c2 = -1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$c2 = substr_count($ip2, ':');
|
||
|
|
}
|
||
|
|
if (strpos($ip2, '.') !== false)
|
||
|
|
{
|
||
|
|
$c2++;
|
||
|
|
}
|
||
|
|
// ::
|
||
|
|
if ($c1 === -1 && $c2 === -1)
|
||
|
|
{
|
||
|
|
$ip = '0:0:0:0:0:0:0:0';
|
||
|
|
}
|
||
|
|
// ::xxx
|
||
|
|
else if ($c1 === -1)
|
||
|
|
{
|
||
|
|
$fill = str_repeat('0:', 7 - $c2);
|
||
|
|
$ip = str_replace('::', $fill, $ip);
|
||
|
|
}
|
||
|
|
// xxx::
|
||
|
|
else if ($c2 === -1)
|
||
|
|
{
|
||
|
|
$fill = str_repeat(':0', 7 - $c1);
|
||
|
|
$ip = str_replace('::', $fill, $ip);
|
||
|
|
}
|
||
|
|
// xxx::xxx
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$fill = ':' . str_repeat('0:', 6 - $c2 - $c1);
|
||
|
|
$ip = str_replace('::', $fill, $ip);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $ip;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compresses an IPv6 address
|
||
|
|
*
|
||
|
|
* RFC 4291 allows you to compress concecutive zero pieces in an address to
|
||
|
|
* '::'. This method expects a valid IPv6 address and compresses consecutive
|
||
|
|
* zero pieces to '::'.
|
||
|
|
*
|
||
|
|
* Example: FF01:0:0:0:0:0:0:101 -> FF01::101
|
||
|
|
* 0:0:0:0:0:0:0:1 -> ::1
|
||
|
|
*
|
||
|
|
* @see uncompress()
|
||
|
|
* @param string $ip An IPv6 address
|
||
|
|
* @return string The compressed IPv6 address
|
||
|
|
*/
|
||
|
|
public static function compress($ip)
|
||
|
|
{
|
||
|
|
// Prepare the IP to be compressed
|
||
|
|
$ip = self::uncompress($ip);
|
||
|
|
$ip_parts = self::split_v6_v4($ip);
|
||
|
|
|
||
|
|
// Break up the IP into each seperate part
|
||
|
|
$ipp = explode(':', $ip_parts[0]);
|
||
|
|
|
||
|
|
// Initialise vars to count consecutive zero pieces
|
||
|
|
$consecutive_zeros = 0;
|
||
|
|
$max_consecutive_zeros = 0;
|
||
|
|
for ($i = 0; $i < count($ipp); $i++)
|
||
|
|
{
|
||
|
|
// Normalise the number (this changes things like 01 to 0)
|
||
|
|
$ipp[$i] = dechex(hexdec($ipp[$i]));
|
||
|
|
|
||
|
|
// Count the zeros
|
||
|
|
if ($ipp[$i] === '0')
|
||
|
|
{
|
||
|
|
$consecutive_zeros++;
|
||
|
|
}
|
||
|
|
elseif ($consecutive_zeros > $max_consecutive_zeros)
|
||
|
|
{
|
||
|
|
$consecutive_zeros_pos = $i - $consecutive_zeros;
|
||
|
|
$max_consecutive_zeros = $consecutive_zeros;
|
||
|
|
$consecutive_zeros = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ($consecutive_zeros > $max_consecutive_zeros)
|
||
|
|
{
|
||
|
|
$consecutive_zeros_pos = $i - $consecutive_zeros;
|
||
|
|
$max_consecutive_zeros = $consecutive_zeros;
|
||
|
|
$consecutive_zeros = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Rebuild the IP
|
||
|
|
if ($max_consecutive_zeros > 0)
|
||
|
|
{
|
||
|
|
$cip = '';
|
||
|
|
for ($i = 0; $i < count($ipp); $i++)
|
||
|
|
{
|
||
|
|
// Add a : for the longest consecutive sequence, or :: if it's at the end
|
||
|
|
if ($i === $consecutive_zeros_pos)
|
||
|
|
{
|
||
|
|
if ($i === count($ipp) - $max_consecutive_zeros)
|
||
|
|
{
|
||
|
|
$cip .= '::';
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$cip .= ':';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Otherwise, just add the piece to the new output
|
||
|
|
elseif ($i < $consecutive_zeros_pos || $i >= $consecutive_zeros_pos + $max_consecutive_zeros)
|
||
|
|
{
|
||
|
|
if ($i !== 0)
|
||
|
|
{
|
||
|
|
$cip .= ':';
|
||
|
|
}
|
||
|
|
$cip .= $ipp[$i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Cheat if we don't have any zero pieces
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$cip = implode(':', $ipp);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Re-add any IPv4 part of the address
|
||
|
|
if ($ip_parts[1] !== '')
|
||
|
|
{
|
||
|
|
$cip .= ":{$ip_parts[1]}";
|
||
|
|
}
|
||
|
|
return $cip;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Splits an IPv6 address into the IPv6 and IPv4 representation parts
|
||
|
|
*
|
||
|
|
* RFC 4291 allows you to represent the last two parts of an IPv6 address
|
||
|
|
* using the standard IPv4 representation
|
||
|
|
*
|
||
|
|
* Example: 0:0:0:0:0:0:13.1.68.3
|
||
|
|
* 0:0:0:0:0:FFFF:129.144.52.38
|
||
|
|
*
|
||
|
|
* @param string $ip An IPv6 address
|
||
|
|
* @return array [0] contains the IPv6 represented part, and [1] the IPv4 represented part
|
||
|
|
*/
|
||
|
|
private static function split_v6_v4($ip)
|
||
|
|
{
|
||
|
|
if (strpos($ip, '.') !== false)
|
||
|
|
{
|
||
|
|
$pos = strrpos($ip, ':');
|
||
|
|
$ipv6_part = substr($ip, 0, $pos);
|
||
|
|
$ipv4_part = substr($ip, $pos + 1);
|
||
|
|
return array($ipv6_part, $ipv4_part);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return array($ip, '');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks an IPv6 address
|
||
|
|
*
|
||
|
|
* Checks if the given IP is a valid IPv6 address
|
||
|
|
*
|
||
|
|
* @param string $ip An IPv6 address
|
||
|
|
* @return bool true if $ip is a valid IPv6 address
|
||
|
|
*/
|
||
|
|
public static function check_ipv6($ip)
|
||
|
|
{
|
||
|
|
$ip = self::uncompress($ip);
|
||
|
|
list($ipv6, $ipv4) = self::split_v6_v4($ip);
|
||
|
|
$ipv6 = explode(':', $ipv6);
|
||
|
|
$ipv4 = explode('.', $ipv4);
|
||
|
|
if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4)
|
||
|
|
{
|
||
|
|
foreach ($ipv6 as $ipv6_part)
|
||
|
|
{
|
||
|
|
$ipv6_part = ltrim($ipv6_part, '0');
|
||
|
|
if ($ipv6_part === '')
|
||
|
|
$ipv6_part = '0';
|
||
|
|
$value = hexdec($ipv6_part);
|
||
|
|
if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF)
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (count($ipv4) === 4)
|
||
|
|
{
|
||
|
|
foreach ($ipv4 as $ipv4_part)
|
||
|
|
{
|
||
|
|
$value = (int) $ipv4_part;
|
||
|
|
if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF)
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
?>
|