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+<?php
+/**
+ * SimplePie
+ *
+ * A PHP-Based RSS and Atom Feed Framework.
+ * Takes the hard work out of managing a complete RSS/Atom solution.
+ *
+ * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * * 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.
+ *
+ * * Neither the name of the SimplePie Team nor the names of its contributors may 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 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
+ * AND 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.
+ *
+ * @package SimplePie
+ * @version 1.3-dev
+ * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
+ * @author Ryan Parman
+ * @author Geoffrey Sneddon
+ * @author Ryan McCue
+ * @link http://simplepie.org/ SimplePie
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ */
+
+/**
+ * IRI parser/serialiser
+ *
+ * @package SimplePie
+ */
+class SimplePie_IRI
+{
+ /**
+ * Scheme
+ *
+ * @access private
+ * @var string
+ */
+ var $scheme;
+
+ /**
+ * User Information
+ *
+ * @access private
+ * @var string
+ */
+ var $userinfo;
+
+ /**
+ * Host
+ *
+ * @access private
+ * @var string
+ */
+ var $host;
+
+ /**
+ * Port
+ *
+ * @access private
+ * @var string
+ */
+ var $port;
+
+ /**
+ * Path
+ *
+ * @access private
+ * @var string
+ */
+ var $path;
+
+ /**
+ * Query
+ *
+ * @access private
+ * @var string
+ */
+ var $query;
+
+ /**
+ * Fragment
+ *
+ * @access private
+ * @var string
+ */
+ var $fragment;
+
+ /**
+ * Whether the object represents a valid IRI
+ *
+ * @access private
+ * @var array
+ */
+ var $valid = array();
+
+ /**
+ * Return the entire IRI when you try and read the object as a string
+ *
+ * @access public
+ * @return string
+ */
+ public function __toString()
+ {
+ return $this->get_iri();
+ }
+
+ /**
+ * Create a new IRI object, from a specified string
+ *
+ * @access public
+ * @param string $iri
+ * @return SimplePie_IRI
+ */
+ public function __construct($iri)
+ {
+ $iri = (string) $iri;
+ if ($iri !== '')
+ {
+ $parsed = $this->parse_iri($iri);
+ $this->set_scheme($parsed['scheme']);
+ $this->set_authority($parsed['authority']);
+ $this->set_path($parsed['path']);
+ $this->set_query($parsed['query']);
+ $this->set_fragment($parsed['fragment']);
+ }
+ }
+
+ /**
+ * Create a new IRI object by resolving a relative IRI
+ *
+ * @static
+ * @access public
+ * @param SimplePie_IRI $base Base IRI
+ * @param string $relative Relative IRI
+ * @return SimplePie_IRI
+ */
+ public static function absolutize($base, $relative)
+ {
+ $relative = (string) $relative;
+ if ($relative !== '')
+ {
+ $relative = new SimplePie_IRI($relative);
+ if ($relative->get_scheme() !== null)
+ {
+ $target = $relative;
+ }
+ elseif ($base->get_iri() !== null)
+ {
+ if ($relative->get_authority() !== null)
+ {
+ $target = $relative;
+ $target->set_scheme($base->get_scheme());
+ }
+ else
+ {
+ $target = new SimplePie_IRI('');
+ $target->set_scheme($base->get_scheme());
+ $target->set_userinfo($base->get_userinfo());
+ $target->set_host($base->get_host());
+ $target->set_port($base->get_port());
+ if ($relative->get_path() !== null)
+ {
+ if (strpos($relative->get_path(), '/') === 0)
+ {
+ $target->set_path($relative->get_path());
+ }
+ elseif (($base->get_userinfo() !== null || $base->get_host() !== null || $base->get_port() !== null) && $base->get_path() === null)
+ {
+ $target->set_path('/' . $relative->get_path());
+ }
+ elseif (($last_segment = strrpos($base->get_path(), '/')) !== false)
+ {
+ $target->set_path(substr($base->get_path(), 0, $last_segment + 1) . $relative->get_path());
+ }
+ else
+ {
+ $target->set_path($relative->get_path());
+ }
+ $target->set_query($relative->get_query());
+ }
+ else
+ {
+ $target->set_path($base->get_path());
+ if ($relative->get_query() !== null)
+ {
+ $target->set_query($relative->get_query());
+ }
+ elseif ($base->get_query() !== null)
+ {
+ $target->set_query($base->get_query());
+ }
+ }
+ }
+ $target->set_fragment($relative->get_fragment());
+ }
+ else
+ {
+ // No base URL, just return the relative URL
+ $target = $relative;
+ }
+ }
+ else
+ {
+ $target = $base;
+ }
+ return $target;
+ }
+
+ /**
+ * Parse an IRI into scheme/authority/path/query/fragment segments
+ *
+ * @access private
+ * @param string $iri
+ * @return array
+ */
+ public function parse_iri($iri)
+ {
+ preg_match('/^(([^:\/?#]+):)?(\/\/([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?$/', $iri, $match);
+ for ($i = count($match); $i <= 9; $i++)
+ {
+ $match[$i] = '';
+ }
+ return array('scheme' => $match[2], 'authority' => $match[4], 'path' => $match[5], 'query' => $match[7], 'fragment' => $match[9]);
+ }
+
+ /**
+ * Remove dot segments from a path
+ *
+ * @access private
+ * @param string $input
+ * @return string
+ */
+ public function remove_dot_segments($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 $valid_chars Valid characters not in iunreserved or iprivate (this is ASCII-only)
+ * @param int $case Normalise case
+ * @param bool $iprivate Allow iprivate
+ * @return string
+ */
+ protected function replace_invalid_with_pct_encoding($string, $valid_chars, $case = SIMPLEPIE_SAME_CASE, $iprivate = false)
+ {
+ // Normalize as many pct-encoded sections as possible
+ $string = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array(&$this, 'remove_iunreserved_percent_encoded'), $string);
+
+ // Replace invalid percent characters
+ $string = preg_replace('/%(?![A-Fa-f0-9]{2})/', '%25', $string);
+
+ // Add unreserved and % to $valid_chars (the latter is safe because all
+ // pct-encoded sections are now valid).
+ $valid_chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~%';
+
+ // Now replace any bytes that aren't allowed with their pct-encoded versions
+ $position = 0;
+ $strlen = strlen($string);
+ while (($position += strspn($string, $valid_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;
+ $strlen += 2;
+ }
+ }
+ }
+
+ // Normalise case
+ if ($case & SIMPLEPIE_LOWERCASE)
+ {
+ $string = strtolower($string);
+ }
+ elseif ($case & SIMPLEPIE_UPPERCASE)
+ {
+ $string = strtoupper($string);
+ }
+
+ return $string;
+ }
+
+ /**
+ * Callback function for preg_replace_callback.
+ *
+ * Removes sequences of percent encoded bytes that represent UTF-8
+ * encoded characters in iunreserved
+ *
+ * @param array $match PCRE match
+ * @return string Replacement
+ */
+ protected function remove_iunreserved_percent_encoded($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 $string;
+ }
+
+ /**
+ * Check if the object represents a valid IRI
+ *
+ * @access public
+ * @return bool
+ */
+ public function is_valid()
+ {
+ return array_sum($this->valid) === count($this->valid);
+ }
+
+ /**
+ * Set the scheme. Returns true on success, false on failure (if there are
+ * any invalid characters).
+ *
+ * @access public
+ * @param string $scheme
+ * @return bool
+ */
+ public function set_scheme($scheme)
+ {
+ if ($scheme === null || $scheme === '')
+ {
+ $this->scheme = null;
+ }
+ else
+ {
+ $len = strlen($scheme);
+ switch (true)
+ {
+ case $len > 1:
+ if (!strspn($scheme, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-.', 1))
+ {
+ $this->scheme = null;
+ $this->valid[__FUNCTION__] = false;
+ return false;
+ }
+
+ case $len > 0:
+ if (!strspn($scheme, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', 0, 1))
+ {
+ $this->scheme = null;
+ $this->valid[__FUNCTION__] = false;
+ return false;
+ }
+ }
+ $this->scheme = strtolower($scheme);
+ }
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+
+ /**
+ * Set the authority. Returns true on success, false on failure (if there are
+ * any invalid characters).
+ *
+ * @access public
+ * @param string $authority
+ * @return bool
+ */
+ public function set_authority($authority)
+ {
+ if (($userinfo_end = strrpos($authority, '@')) !== false)
+ {
+ $userinfo = substr($authority, 0, $userinfo_end);
+ $authority = substr($authority, $userinfo_end + 1);
+ }
+ else
+ {
+ $userinfo = null;
+ }
+
+ if (($port_start = strpos($authority, ':')) !== false)
+ {
+ $port = substr($authority, $port_start + 1);
+ if ($port === false)
+ {
+ $port = null;
+ }
+ $authority = substr($authority, 0, $port_start);
+ }
+ else
+ {
+ $port = null;
+ }
+
+ return $this->set_userinfo($userinfo) && $this->set_host($authority) && $this->set_port($port);
+ }
+
+ /**
+ * Set the userinfo.
+ *
+ * @access public
+ * @param string $userinfo
+ * @return bool
+ */
+ public function set_userinfo($userinfo)
+ {
+ if ($userinfo === null || $userinfo === '')
+ {
+ $this->userinfo = null;
+ }
+ else
+ {
+ $this->userinfo = $this->replace_invalid_with_pct_encoding($userinfo, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=:');
+ }
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+
+ /**
+ * Set the host. Returns true on success, false on failure (if there are
+ * any invalid characters).
+ *
+ * @access public
+ * @param string $host
+ * @return bool
+ */
+ public function set_host($host)
+ {
+ if ($host === null || $host === '')
+ {
+ $this->host = null;
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ elseif ($host[0] === '[' && substr($host, -1) === ']')
+ {
+ if (SimplePie_Net_IPv6::checkIPv6(substr($host, 1, -1)))
+ {
+ $this->host = $host;
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ else
+ {
+ $this->host = null;
+ $this->valid[__FUNCTION__] = false;
+ return false;
+ }
+ }
+ else
+ {
+ $this->host = $this->replace_invalid_with_pct_encoding($host, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=', SIMPLEPIE_LOWERCASE);
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ }
+
+ /**
+ * Set the port. Returns true on success, false on failure (if there are
+ * any invalid characters).
+ *
+ * @access public
+ * @param string $port
+ * @return bool
+ */
+ public function set_port($port)
+ {
+ if ($port === null || $port === '')
+ {
+ $this->port = null;
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ elseif (strspn($port, '0123456789') === strlen($port))
+ {
+ $this->port = (int) $port;
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ else
+ {
+ $this->port = null;
+ $this->valid[__FUNCTION__] = false;
+ return false;
+ }
+ }
+
+ /**
+ * Set the path.
+ *
+ * @access public
+ * @param string $path
+ * @return bool
+ */
+ public function set_path($path)
+ {
+ if ($path === null || $path === '')
+ {
+ $this->path = null;
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ elseif (substr($path, 0, 2) === '//' && $this->userinfo === null && $this->host === null && $this->port === null)
+ {
+ $this->path = null;
+ $this->valid[__FUNCTION__] = false;
+ return false;
+ }
+ else
+ {
+ $this->path = $this->replace_invalid_with_pct_encoding($path, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=@/');
+ if ($this->scheme !== null)
+ {
+ $this->path = $this->remove_dot_segments($this->path);
+ }
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+ }
+
+ /**
+ * Set the query.
+ *
+ * @access public
+ * @param string $query
+ * @return bool
+ */
+ public function set_query($query)
+ {
+ if ($query === null || $query === '')
+ {
+ $this->query = null;
+ }
+ else
+ {
+ $this->query = $this->replace_invalid_with_pct_encoding($query, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$\'()*+,;:@/?&=');
+ }
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+
+ /**
+ * Set the fragment.
+ *
+ * @access public
+ * @param string $fragment
+ * @return bool
+ */
+ public function set_fragment($fragment)
+ {
+ if ($fragment === null || $fragment === '')
+ {
+ $this->fragment = null;
+ }
+ else
+ {
+ $this->fragment = $this->replace_invalid_with_pct_encoding($fragment, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=:@/?');
+ }
+ $this->valid[__FUNCTION__] = true;
+ return true;
+ }
+
+ /**
+ * Get the complete IRI
+ *
+ * @access public
+ * @return string
+ */
+ public function get_iri()
+ {
+ $iri = '';
+ if ($this->scheme !== null)
+ {
+ $iri .= $this->scheme . ':';
+ }
+ if (($authority = $this->get_authority()) !== null)
+ {
+ $iri .= '//' . $authority;
+ }
+ if ($this->path !== null)
+ {
+ $iri .= $this->path;
+ }
+ if ($this->query !== null)
+ {
+ $iri .= '?' . $this->query;
+ }
+ if ($this->fragment !== null)
+ {
+ $iri .= '#' . $this->fragment;
+ }
+
+ if ($iri !== '')
+ {
+ return $iri;
+ }
+ else
+ {
+ return null;
+ }
+ }
+
+ /**
+ * Get the scheme
+ *
+ * @access public
+ * @return string
+ */
+ public function get_scheme()
+ {
+ return $this->scheme;
+ }
+
+ /**
+ * Get the complete authority
+ *
+ * @access public
+ * @return string
+ */
+ public function get_authority()
+ {
+ $authority = '';
+ if ($this->userinfo !== null)
+ {
+ $authority .= $this->userinfo . '@';
+ }
+ if ($this->host !== null)
+ {
+ $authority .= $this->host;
+ }
+ if ($this->port !== null)
+ {
+ $authority .= ':' . $this->port;
+ }
+
+ if ($authority !== '')
+ {
+ return $authority;
+ }
+ else
+ {
+ return null;
+ }
+ }
+
+ /**
+ * Get the user information
+ *
+ * @access public
+ * @return string
+ */
+ public function get_userinfo()
+ {
+ return $this->userinfo;
+ }
+
+ /**
+ * Get the host
+ *
+ * @access public
+ * @return string
+ */
+ public function get_host()
+ {
+ return $this->host;
+ }
+
+ /**
+ * Get the port
+ *
+ * @access public
+ * @return string
+ */
+ public function get_port()
+ {
+ return $this->port;
+ }
+
+ /**
+ * Get the path
+ *
+ * @access public
+ * @return string
+ */
+ public function get_path()
+ {
+ return $this->path;
+ }
+
+ /**
+ * Get the query
+ *
+ * @access public
+ * @return string
+ */
+ public function get_query()
+ {
+ return $this->query;
+ }
+
+ /**
+ * Get the fragment
+ *
+ * @access public
+ * @return string
+ */
+ public function get_fragment()
+ {
+ return $this->fragment;
+ }
+}