forked from GNUsocial/gnu-social
941 lines
32 KiB
PHP
941 lines
32 KiB
PHP
<?php
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// +-----------------------------------------------------------------------+
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// | Copyright (c) 2001-2002, Richard Heyes |
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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 |
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// | are met: |
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// | |
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// | o Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | o Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution.|
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// | o The names of the authors may not be used to endorse or promote |
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// | products derived from this software without specific prior written |
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// | permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// | |
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// +-----------------------------------------------------------------------+
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// | Authors: Richard Heyes <richard@phpguru.org> |
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// | Chuck Hagenbuch <chuck@horde.org> |
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// +-----------------------------------------------------------------------+
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/**
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* RFC 822 Email address list validation Utility
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*
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* What is it?
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*
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* This class will take an address string, and parse it into it's consituent
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* parts, be that either addresses, groups, or combinations. Nested groups
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* are not supported. The structure it returns is pretty straight forward,
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* and is similar to that provided by the imap_rfc822_parse_adrlist(). Use
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* print_r() to view the structure.
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*
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* How do I use it?
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*
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* $address_string = 'My Group: "Richard" <richard@localhost> (A comment), ted@example.com (Ted Bloggs), Barney;';
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* $structure = Mail_RFC822::parseAddressList($address_string, 'example.com', true)
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* print_r($structure);
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*
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* @author Richard Heyes <richard@phpguru.org>
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* @author Chuck Hagenbuch <chuck@horde.org>
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* @version $Revision: 1.24 $
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* @license BSD
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* @package Mail
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*/
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class Mail_RFC822 {
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/**
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* The address being parsed by the RFC822 object.
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* @var string $address
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*/
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var $address = '';
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/**
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* The default domain to use for unqualified addresses.
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* @var string $default_domain
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*/
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var $default_domain = 'localhost';
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/**
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* Should we return a nested array showing groups, or flatten everything?
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* @var boolean $nestGroups
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*/
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var $nestGroups = true;
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/**
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* Whether or not to validate atoms for non-ascii characters.
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* @var boolean $validate
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*/
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var $validate = true;
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/**
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* The array of raw addresses built up as we parse.
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* @var array $addresses
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*/
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var $addresses = array();
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/**
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* The final array of parsed address information that we build up.
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* @var array $structure
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*/
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var $structure = array();
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/**
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* The current error message, if any.
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* @var string $error
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*/
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var $error = null;
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/**
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* An internal counter/pointer.
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* @var integer $index
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*/
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var $index = null;
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/**
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* The number of groups that have been found in the address list.
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* @var integer $num_groups
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* @access public
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*/
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var $num_groups = 0;
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/**
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* A variable so that we can tell whether or not we're inside a
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* Mail_RFC822 object.
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* @var boolean $mailRFC822
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*/
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var $mailRFC822 = true;
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/**
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* A limit after which processing stops
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* @var int $limit
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*/
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var $limit = null;
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/**
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* Sets up the object. The address must either be set here or when
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* calling parseAddressList(). One or the other.
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*
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* @access public
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* @param string $address The address(es) to validate.
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* @param string $default_domain Default domain/host etc. If not supplied, will be set to localhost.
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* @param boolean $nest_groups Whether to return the structure with groups nested for easier viewing.
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* @param boolean $validate Whether to validate atoms. Turn this off if you need to run addresses through before encoding the personal names, for instance.
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*
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* @return object Mail_RFC822 A new Mail_RFC822 object.
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*/
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function Mail_RFC822($address = null, $default_domain = null, $nest_groups = null, $validate = null, $limit = null)
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{
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if (isset($address)) $this->address = $address;
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if (isset($default_domain)) $this->default_domain = $default_domain;
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if (isset($nest_groups)) $this->nestGroups = $nest_groups;
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if (isset($validate)) $this->validate = $validate;
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if (isset($limit)) $this->limit = $limit;
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}
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/**
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* Starts the whole process. The address must either be set here
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* or when creating the object. One or the other.
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*
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* @access public
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* @param string $address The address(es) to validate.
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* @param string $default_domain Default domain/host etc.
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* @param boolean $nest_groups Whether to return the structure with groups nested for easier viewing.
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* @param boolean $validate Whether to validate atoms. Turn this off if you need to run addresses through before encoding the personal names, for instance.
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*
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* @return array A structured array of addresses.
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*/
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function parseAddressList($address = null, $default_domain = null, $nest_groups = null, $validate = null, $limit = null)
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{
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if (!isset($this) || !isset($this->mailRFC822)) {
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$obj = new Mail_RFC822($address, $default_domain, $nest_groups, $validate, $limit);
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return $obj->parseAddressList();
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}
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if (isset($address)) $this->address = $address;
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if (isset($default_domain)) $this->default_domain = $default_domain;
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if (isset($nest_groups)) $this->nestGroups = $nest_groups;
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if (isset($validate)) $this->validate = $validate;
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if (isset($limit)) $this->limit = $limit;
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$this->structure = array();
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$this->addresses = array();
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$this->error = null;
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$this->index = null;
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// Unfold any long lines in $this->address.
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$this->address = preg_replace('/\r?\n/', "\r\n", $this->address);
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$this->address = preg_replace('/\r\n(\t| )+/', ' ', $this->address);
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while ($this->address = $this->_splitAddresses($this->address));
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if ($this->address === false || isset($this->error)) {
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require_once 'PEAR.php';
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return PEAR::raiseError($this->error);
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}
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// Validate each address individually. If we encounter an invalid
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// address, stop iterating and return an error immediately.
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foreach ($this->addresses as $address) {
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$valid = $this->_validateAddress($address);
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if ($valid === false || isset($this->error)) {
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require_once 'PEAR.php';
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return PEAR::raiseError($this->error);
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}
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if (!$this->nestGroups) {
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$this->structure = array_merge($this->structure, $valid);
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} else {
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$this->structure[] = $valid;
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}
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}
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return $this->structure;
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}
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/**
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* Splits an address into separate addresses.
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*
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* @access private
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* @param string $address The addresses to split.
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* @return boolean Success or failure.
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*/
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function _splitAddresses($address)
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{
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if (!empty($this->limit) && count($this->addresses) == $this->limit) {
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return '';
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}
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if ($this->_isGroup($address) && !isset($this->error)) {
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$split_char = ';';
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$is_group = true;
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} elseif (!isset($this->error)) {
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$split_char = ',';
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$is_group = false;
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} elseif (isset($this->error)) {
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return false;
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}
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// Split the string based on the above ten or so lines.
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$parts = explode($split_char, $address);
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$string = $this->_splitCheck($parts, $split_char);
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// If a group...
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if ($is_group) {
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// If $string does not contain a colon outside of
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// brackets/quotes etc then something's fubar.
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// First check there's a colon at all:
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if (strpos($string, ':') === false) {
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$this->error = 'Invalid address: ' . $string;
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return false;
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}
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// Now check it's outside of brackets/quotes:
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if (!$this->_splitCheck(explode(':', $string), ':')) {
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return false;
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}
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// We must have a group at this point, so increase the counter:
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$this->num_groups++;
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}
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// $string now contains the first full address/group.
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// Add to the addresses array.
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$this->addresses[] = array(
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'address' => trim($string),
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'group' => $is_group
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);
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// Remove the now stored address from the initial line, the +1
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// is to account for the explode character.
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$address = trim(substr($address, strlen($string) + 1));
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// If the next char is a comma and this was a group, then
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// there are more addresses, otherwise, if there are any more
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// chars, then there is another address.
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if ($is_group && substr($address, 0, 1) == ','){
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$address = trim(substr($address, 1));
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return $address;
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} elseif (strlen($address) > 0) {
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return $address;
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} else {
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return '';
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}
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// If you got here then something's off
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return false;
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}
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/**
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* Checks for a group at the start of the string.
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*
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* @access private
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* @param string $address The address to check.
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* @return boolean Whether or not there is a group at the start of the string.
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*/
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function _isGroup($address)
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{
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// First comma not in quotes, angles or escaped:
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$parts = explode(',', $address);
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$string = $this->_splitCheck($parts, ',');
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// Now we have the first address, we can reliably check for a
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// group by searching for a colon that's not escaped or in
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// quotes or angle brackets.
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if (count($parts = explode(':', $string)) > 1) {
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$string2 = $this->_splitCheck($parts, ':');
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return ($string2 !== $string);
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} else {
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return false;
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}
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}
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/**
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* A common function that will check an exploded string.
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*
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* @access private
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* @param array $parts The exloded string.
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* @param string $char The char that was exploded on.
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* @return mixed False if the string contains unclosed quotes/brackets, or the string on success.
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*/
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function _splitCheck($parts, $char)
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{
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$string = $parts[0];
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for ($i = 0; $i < count($parts); $i++) {
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if ($this->_hasUnclosedQuotes($string)
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|| $this->_hasUnclosedBrackets($string, '<>')
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|| $this->_hasUnclosedBrackets($string, '[]')
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|| $this->_hasUnclosedBrackets($string, '()')
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|| substr($string, -1) == '\\') {
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if (isset($parts[$i + 1])) {
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$string = $string . $char . $parts[$i + 1];
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} else {
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$this->error = 'Invalid address spec. Unclosed bracket or quotes';
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return false;
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}
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} else {
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$this->index = $i;
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break;
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}
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}
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return $string;
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}
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/**
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* Checks if a string has unclosed quotes or not.
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*
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* @access private
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* @param string $string The string to check.
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* @return boolean True if there are unclosed quotes inside the string,
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* false otherwise.
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*/
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function _hasUnclosedQuotes($string)
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{
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$string = trim($string);
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$iMax = strlen($string);
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$in_quote = false;
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$i = $slashes = 0;
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for (; $i < $iMax; ++$i) {
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switch ($string[$i]) {
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case '\\':
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++$slashes;
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break;
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case '"':
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if ($slashes % 2 == 0) {
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$in_quote = !$in_quote;
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}
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// Fall through to default action below.
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default:
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$slashes = 0;
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break;
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}
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}
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return $in_quote;
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}
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/**
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* Checks if a string has an unclosed brackets or not. IMPORTANT:
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* This function handles both angle brackets and square brackets;
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*
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* @access private
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* @param string $string The string to check.
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* @param string $chars The characters to check for.
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* @return boolean True if there are unclosed brackets inside the string, false otherwise.
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*/
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function _hasUnclosedBrackets($string, $chars)
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{
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$num_angle_start = substr_count($string, $chars[0]);
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$num_angle_end = substr_count($string, $chars[1]);
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$this->_hasUnclosedBracketsSub($string, $num_angle_start, $chars[0]);
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$this->_hasUnclosedBracketsSub($string, $num_angle_end, $chars[1]);
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if ($num_angle_start < $num_angle_end) {
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$this->error = 'Invalid address spec. Unmatched quote or bracket (' . $chars . ')';
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return false;
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} else {
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return ($num_angle_start > $num_angle_end);
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}
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}
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/**
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* Sub function that is used only by hasUnclosedBrackets().
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*
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* @access private
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* @param string $string The string to check.
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* @param integer &$num The number of occurences.
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* @param string $char The character to count.
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* @return integer The number of occurences of $char in $string, adjusted for backslashes.
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*/
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function _hasUnclosedBracketsSub($string, &$num, $char)
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{
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$parts = explode($char, $string);
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for ($i = 0; $i < count($parts); $i++){
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if (substr($parts[$i], -1) == '\\' || $this->_hasUnclosedQuotes($parts[$i]))
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$num--;
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if (isset($parts[$i + 1]))
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$parts[$i + 1] = $parts[$i] . $char . $parts[$i + 1];
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}
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return $num;
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}
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/**
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* Function to begin checking the address.
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*
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* @access private
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* @param string $address The address to validate.
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* @return mixed False on failure, or a structured array of address information on success.
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*/
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function _validateAddress($address)
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{
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$is_group = false;
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$addresses = array();
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if ($address['group']) {
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$is_group = true;
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// Get the group part of the name
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$parts = explode(':', $address['address']);
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$groupname = $this->_splitCheck($parts, ':');
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$structure = array();
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// And validate the group part of the name.
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if (!$this->_validatePhrase($groupname)){
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$this->error = 'Group name did not validate.';
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return false;
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} else {
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// Don't include groups if we are not nesting
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// them. This avoids returning invalid addresses.
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if ($this->nestGroups) {
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$structure = new stdClass;
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$structure->groupname = $groupname;
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}
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}
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$address['address'] = ltrim(substr($address['address'], strlen($groupname . ':')));
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}
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// If a group then split on comma and put into an array.
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// Otherwise, Just put the whole address in an array.
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if ($is_group) {
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while (strlen($address['address']) > 0) {
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$parts = explode(',', $address['address']);
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$addresses[] = $this->_splitCheck($parts, ',');
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$address['address'] = trim(substr($address['address'], strlen(end($addresses) . ',')));
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}
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} else {
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$addresses[] = $address['address'];
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}
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// Check that $addresses is set, if address like this:
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// Groupname:;
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// Then errors were appearing.
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if (!count($addresses)){
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$this->error = 'Empty group.';
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return false;
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}
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// Trim the whitespace from all of the address strings.
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array_map('trim', $addresses);
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// Validate each mailbox.
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// Format could be one of: name <geezer@domain.com>
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// geezer@domain.com
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// geezer
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// ... or any other format valid by RFC 822.
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for ($i = 0; $i < count($addresses); $i++) {
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if (!$this->validateMailbox($addresses[$i])) {
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if (empty($this->error)) {
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$this->error = 'Validation failed for: ' . $addresses[$i];
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}
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return false;
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}
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}
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// Nested format
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if ($this->nestGroups) {
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if ($is_group) {
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$structure->addresses = $addresses;
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} else {
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$structure = $addresses[0];
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}
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// Flat format
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} else {
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if ($is_group) {
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$structure = array_merge($structure, $addresses);
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} else {
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$structure = $addresses;
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}
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}
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return $structure;
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}
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|
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/**
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* Function to validate a phrase.
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*
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* @access private
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* @param string $phrase The phrase to check.
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* @return boolean Success or failure.
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*/
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|
function _validatePhrase($phrase)
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{
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|
// Splits on one or more Tab or space.
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|
$parts = preg_split('/[ \\x09]+/', $phrase, -1, PREG_SPLIT_NO_EMPTY);
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$phrase_parts = array();
|
|
while (count($parts) > 0){
|
|
$phrase_parts[] = $this->_splitCheck($parts, ' ');
|
|
for ($i = 0; $i < $this->index + 1; $i++)
|
|
array_shift($parts);
|
|
}
|
|
|
|
foreach ($phrase_parts as $part) {
|
|
// If quoted string:
|
|
if (substr($part, 0, 1) == '"') {
|
|
if (!$this->_validateQuotedString($part)) {
|
|
return false;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// Otherwise it's an atom:
|
|
if (!$this->_validateAtom($part)) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Function to validate an atom which from rfc822 is:
|
|
* atom = 1*<any CHAR except specials, SPACE and CTLs>
|
|
*
|
|
* If validation ($this->validate) has been turned off, then
|
|
* validateAtom() doesn't actually check anything. This is so that you
|
|
* can split a list of addresses up before encoding personal names
|
|
* (umlauts, etc.), for example.
|
|
*
|
|
* @access private
|
|
* @param string $atom The string to check.
|
|
* @return boolean Success or failure.
|
|
*/
|
|
function _validateAtom($atom)
|
|
{
|
|
if (!$this->validate) {
|
|
// Validation has been turned off; assume the atom is okay.
|
|
return true;
|
|
}
|
|
|
|
// Check for any char from ASCII 0 - ASCII 127
|
|
if (!preg_match('/^[\\x00-\\x7E]+$/i', $atom, $matches)) {
|
|
return false;
|
|
}
|
|
|
|
// Check for specials:
|
|
if (preg_match('/[][()<>@,;\\:". ]/', $atom)) {
|
|
return false;
|
|
}
|
|
|
|
// Check for control characters (ASCII 0-31):
|
|
if (preg_match('/[\\x00-\\x1F]+/', $atom)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Function to validate quoted string, which is:
|
|
* quoted-string = <"> *(qtext/quoted-pair) <">
|
|
*
|
|
* @access private
|
|
* @param string $qstring The string to check
|
|
* @return boolean Success or failure.
|
|
*/
|
|
function _validateQuotedString($qstring)
|
|
{
|
|
// Leading and trailing "
|
|
$qstring = substr($qstring, 1, -1);
|
|
|
|
// Perform check, removing quoted characters first.
|
|
return !preg_match('/[\x0D\\\\"]/', preg_replace('/\\\\./', '', $qstring));
|
|
}
|
|
|
|
/**
|
|
* Function to validate a mailbox, which is:
|
|
* mailbox = addr-spec ; simple address
|
|
* / phrase route-addr ; name and route-addr
|
|
*
|
|
* @access public
|
|
* @param string &$mailbox The string to check.
|
|
* @return boolean Success or failure.
|
|
*/
|
|
function validateMailbox(&$mailbox)
|
|
{
|
|
// A couple of defaults.
|
|
$phrase = '';
|
|
$comment = '';
|
|
$comments = array();
|
|
|
|
// Catch any RFC822 comments and store them separately.
|
|
$_mailbox = $mailbox;
|
|
while (strlen(trim($_mailbox)) > 0) {
|
|
$parts = explode('(', $_mailbox);
|
|
$before_comment = $this->_splitCheck($parts, '(');
|
|
if ($before_comment != $_mailbox) {
|
|
// First char should be a (.
|
|
$comment = substr(str_replace($before_comment, '', $_mailbox), 1);
|
|
$parts = explode(')', $comment);
|
|
$comment = $this->_splitCheck($parts, ')');
|
|
$comments[] = $comment;
|
|
|
|
// +1 is for the trailing )
|
|
$_mailbox = substr($_mailbox, strpos($_mailbox, $comment)+strlen($comment)+1);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
foreach ($comments as $comment) {
|
|
$mailbox = str_replace("($comment)", '', $mailbox);
|
|
}
|
|
|
|
$mailbox = trim($mailbox);
|
|
|
|
// Check for name + route-addr
|
|
if (substr($mailbox, -1) == '>' && substr($mailbox, 0, 1) != '<') {
|
|
$parts = explode('<', $mailbox);
|
|
$name = $this->_splitCheck($parts, '<');
|
|
|
|
$phrase = trim($name);
|
|
$route_addr = trim(substr($mailbox, strlen($name.'<'), -1));
|
|
|
|
if ($this->_validatePhrase($phrase) === false || ($route_addr = $this->_validateRouteAddr($route_addr)) === false) {
|
|
return false;
|
|
}
|
|
|
|
// Only got addr-spec
|
|
} else {
|
|
// First snip angle brackets if present.
|
|
if (substr($mailbox, 0, 1) == '<' && substr($mailbox, -1) == '>') {
|
|
$addr_spec = substr($mailbox, 1, -1);
|
|
} else {
|
|
$addr_spec = $mailbox;
|
|
}
|
|
|
|
if (($addr_spec = $this->_validateAddrSpec($addr_spec)) === false) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Construct the object that will be returned.
|
|
$mbox = new stdClass();
|
|
|
|
// Add the phrase (even if empty) and comments
|
|
$mbox->personal = $phrase;
|
|
$mbox->comment = isset($comments) ? $comments : array();
|
|
|
|
if (isset($route_addr)) {
|
|
$mbox->mailbox = $route_addr['local_part'];
|
|
$mbox->host = $route_addr['domain'];
|
|
$route_addr['adl'] !== '' ? $mbox->adl = $route_addr['adl'] : '';
|
|
} else {
|
|
$mbox->mailbox = $addr_spec['local_part'];
|
|
$mbox->host = $addr_spec['domain'];
|
|
}
|
|
|
|
$mailbox = $mbox;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* This function validates a route-addr which is:
|
|
* route-addr = "<" [route] addr-spec ">"
|
|
*
|
|
* Angle brackets have already been removed at the point of
|
|
* getting to this function.
|
|
*
|
|
* @access private
|
|
* @param string $route_addr The string to check.
|
|
* @return mixed False on failure, or an array containing validated address/route information on success.
|
|
*/
|
|
function _validateRouteAddr($route_addr)
|
|
{
|
|
// Check for colon.
|
|
if (strpos($route_addr, ':') !== false) {
|
|
$parts = explode(':', $route_addr);
|
|
$route = $this->_splitCheck($parts, ':');
|
|
} else {
|
|
$route = $route_addr;
|
|
}
|
|
|
|
// If $route is same as $route_addr then the colon was in
|
|
// quotes or brackets or, of course, non existent.
|
|
if ($route === $route_addr){
|
|
unset($route);
|
|
$addr_spec = $route_addr;
|
|
if (($addr_spec = $this->_validateAddrSpec($addr_spec)) === false) {
|
|
return false;
|
|
}
|
|
} else {
|
|
// Validate route part.
|
|
if (($route = $this->_validateRoute($route)) === false) {
|
|
return false;
|
|
}
|
|
|
|
$addr_spec = substr($route_addr, strlen($route . ':'));
|
|
|
|
// Validate addr-spec part.
|
|
if (($addr_spec = $this->_validateAddrSpec($addr_spec)) === false) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (isset($route)) {
|
|
$return['adl'] = $route;
|
|
} else {
|
|
$return['adl'] = '';
|
|
}
|
|
|
|
$return = array_merge($return, $addr_spec);
|
|
return $return;
|
|
}
|
|
|
|
/**
|
|
* Function to validate a route, which is:
|
|
* route = 1#("@" domain) ":"
|
|
*
|
|
* @access private
|
|
* @param string $route The string to check.
|
|
* @return mixed False on failure, or the validated $route on success.
|
|
*/
|
|
function _validateRoute($route)
|
|
{
|
|
// Split on comma.
|
|
$domains = explode(',', trim($route));
|
|
|
|
foreach ($domains as $domain) {
|
|
$domain = str_replace('@', '', trim($domain));
|
|
if (!$this->_validateDomain($domain)) return false;
|
|
}
|
|
|
|
return $route;
|
|
}
|
|
|
|
/**
|
|
* Function to validate a domain, though this is not quite what
|
|
* you expect of a strict internet domain.
|
|
*
|
|
* domain = sub-domain *("." sub-domain)
|
|
*
|
|
* @access private
|
|
* @param string $domain The string to check.
|
|
* @return mixed False on failure, or the validated domain on success.
|
|
*/
|
|
function _validateDomain($domain)
|
|
{
|
|
// Note the different use of $subdomains and $sub_domains
|
|
$subdomains = explode('.', $domain);
|
|
|
|
while (count($subdomains) > 0) {
|
|
$sub_domains[] = $this->_splitCheck($subdomains, '.');
|
|
for ($i = 0; $i < $this->index + 1; $i++)
|
|
array_shift($subdomains);
|
|
}
|
|
|
|
foreach ($sub_domains as $sub_domain) {
|
|
if (!$this->_validateSubdomain(trim($sub_domain)))
|
|
return false;
|
|
}
|
|
|
|
// Managed to get here, so return input.
|
|
return $domain;
|
|
}
|
|
|
|
/**
|
|
* Function to validate a subdomain:
|
|
* subdomain = domain-ref / domain-literal
|
|
*
|
|
* @access private
|
|
* @param string $subdomain The string to check.
|
|
* @return boolean Success or failure.
|
|
*/
|
|
function _validateSubdomain($subdomain)
|
|
{
|
|
if (preg_match('|^\[(.*)]$|', $subdomain, $arr)){
|
|
if (!$this->_validateDliteral($arr[1])) return false;
|
|
} else {
|
|
if (!$this->_validateAtom($subdomain)) return false;
|
|
}
|
|
|
|
// Got here, so return successful.
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Function to validate a domain literal:
|
|
* domain-literal = "[" *(dtext / quoted-pair) "]"
|
|
*
|
|
* @access private
|
|
* @param string $dliteral The string to check.
|
|
* @return boolean Success or failure.
|
|
*/
|
|
function _validateDliteral($dliteral)
|
|
{
|
|
return !preg_match('/(.)[][\x0D\\\\]/', $dliteral, $matches) && $matches[1] != '\\';
|
|
}
|
|
|
|
/**
|
|
* Function to validate an addr-spec.
|
|
*
|
|
* addr-spec = local-part "@" domain
|
|
*
|
|
* @access private
|
|
* @param string $addr_spec The string to check.
|
|
* @return mixed False on failure, or the validated addr-spec on success.
|
|
*/
|
|
function _validateAddrSpec($addr_spec)
|
|
{
|
|
$addr_spec = trim($addr_spec);
|
|
|
|
// Split on @ sign if there is one.
|
|
if (strpos($addr_spec, '@') !== false) {
|
|
$parts = explode('@', $addr_spec);
|
|
$local_part = $this->_splitCheck($parts, '@');
|
|
$domain = substr($addr_spec, strlen($local_part . '@'));
|
|
|
|
// No @ sign so assume the default domain.
|
|
} else {
|
|
$local_part = $addr_spec;
|
|
$domain = $this->default_domain;
|
|
}
|
|
|
|
if (($local_part = $this->_validateLocalPart($local_part)) === false) return false;
|
|
if (($domain = $this->_validateDomain($domain)) === false) return false;
|
|
|
|
// Got here so return successful.
|
|
return array('local_part' => $local_part, 'domain' => $domain);
|
|
}
|
|
|
|
/**
|
|
* Function to validate the local part of an address:
|
|
* local-part = word *("." word)
|
|
*
|
|
* @access private
|
|
* @param string $local_part
|
|
* @return mixed False on failure, or the validated local part on success.
|
|
*/
|
|
function _validateLocalPart($local_part)
|
|
{
|
|
$parts = explode('.', $local_part);
|
|
$words = array();
|
|
|
|
// Split the local_part into words.
|
|
while (count($parts) > 0){
|
|
$words[] = $this->_splitCheck($parts, '.');
|
|
for ($i = 0; $i < $this->index + 1; $i++) {
|
|
array_shift($parts);
|
|
}
|
|
}
|
|
|
|
// Validate each word.
|
|
foreach ($words as $word) {
|
|
// If this word contains an unquoted space, it is invalid. (6.2.4)
|
|
if (strpos($word, ' ') && $word[0] !== '"')
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if ($this->_validatePhrase(trim($word)) === false) return false;
|
|
}
|
|
|
|
// Managed to get here, so return the input.
|
|
return $local_part;
|
|
}
|
|
|
|
/**
|
|
* Returns an approximate count of how many addresses are in the
|
|
* given string. This is APPROXIMATE as it only splits based on a
|
|
* comma which has no preceding backslash. Could be useful as
|
|
* large amounts of addresses will end up producing *large*
|
|
* structures when used with parseAddressList().
|
|
*
|
|
* @param string $data Addresses to count
|
|
* @return int Approximate count
|
|
*/
|
|
function approximateCount($data)
|
|
{
|
|
return count(preg_split('/(?<!\\\\),/', $data));
|
|
}
|
|
|
|
/**
|
|
* This is a email validating function separate to the rest of the
|
|
* class. It simply validates whether an email is of the common
|
|
* internet form: <user>@<domain>. This can be sufficient for most
|
|
* people. Optional stricter mode can be utilised which restricts
|
|
* mailbox characters allowed to alphanumeric, full stop, hyphen
|
|
* and underscore.
|
|
*
|
|
* @param string $data Address to check
|
|
* @param boolean $strict Optional stricter mode
|
|
* @return mixed False if it fails, an indexed array
|
|
* username/domain if it matches
|
|
*/
|
|
function isValidInetAddress($data, $strict = false)
|
|
{
|
|
$regex = $strict ? '/^([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})$/i' : '/^([*+!.&#$|\'\\%\/0-9a-z^_`{}=?~:-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})$/i';
|
|
if (preg_match($regex, trim($data), $matches)) {
|
|
return array($matches[1], $matches[2]);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
}
|