| 1 | <?php |
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| 2 | |
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| 3 | /* |
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| 4 | +-----------------------------------------------------------------------+ |
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| 5 | | program/include/rcube_vcard.php | |
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| 6 | | | |
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| 7 | | This file is part of the Roundcube Webmail client | |
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| 8 | | Copyright (C) 2008-2010, Roundcube Dev. - Switzerland | |
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| 9 | | Licensed under the GNU GPL | |
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| 10 | | | |
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| 11 | | PURPOSE: | |
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| 12 | | Logical representation of a vcard address record | |
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| 13 | +-----------------------------------------------------------------------+ |
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| 14 | | Author: Thomas Bruederli <roundcube@gmail.com> | |
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| 15 | +-----------------------------------------------------------------------+ |
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| 16 | |
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| 17 | $Id$ |
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| 18 | |
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| 19 | */ |
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| 20 | |
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| 21 | |
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| 22 | /** |
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| 23 | * Logical representation of a vcard-based address record |
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| 24 | * Provides functions to parse and export vCard data format |
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| 25 | * |
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| 26 | * @package Addressbook |
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| 27 | * @author Thomas Bruederli <roundcube@gmail.com> |
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| 28 | */ |
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| 29 | class rcube_vcard |
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| 30 | { |
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| 31 | private $raw = array( |
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| 32 | 'FN' => array(), |
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| 33 | 'N' => array(array('','','','','')), |
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| 34 | ); |
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| 35 | private $fieldmap = array('phone' => 'TEL', 'birthday' => 'BDAY', 'website' => 'URL', 'notes' => 'NOTE', 'email' => 'EMAIL', 'address' => 'ADR', 'gender' => 'X-GENDER', 'maidenname' => 'X-MAIDENNAME', 'gender' => 'X-GENDER'); |
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| 36 | private $typemap = array('iPhone' => 'mobile', 'CELL' => 'mobile'); |
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| 37 | private $immap = array('X-JABBER' => 'jabber', 'X-ICQ' => 'icq', 'X-MSN' => 'msn', 'X-AIM' => 'aim', 'X-YAHOO' => 'yahoo'); |
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| 38 | |
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| 39 | public $business = false; |
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| 40 | public $displayname; |
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| 41 | public $surname; |
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| 42 | public $firstname; |
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| 43 | public $middlename; |
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| 44 | public $nickname; |
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| 45 | public $organization; |
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| 46 | public $notes; |
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| 47 | public $email = array(); |
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| 48 | |
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| 49 | |
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| 50 | /** |
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| 51 | * Constructor |
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| 52 | */ |
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| 53 | public function __construct($vcard = null, $charset = RCMAIL_CHARSET) |
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| 54 | { |
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| 55 | if (!empty($vcard)) |
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| 56 | $this->load($vcard, $charset); |
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| 57 | } |
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| 58 | |
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| 59 | |
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| 60 | /** |
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| 61 | * Load record from (internal, unfolded) vcard 3.0 format |
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| 62 | * |
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| 63 | * @param string vCard string to parse |
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| 64 | */ |
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| 65 | public function load($vcard, $charset = RCMAIL_CHARSET) |
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| 66 | { |
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| 67 | $this->raw = self::vcard_decode($vcard); |
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| 68 | |
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| 69 | // resolve charset parameters |
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| 70 | if ($charset == null) |
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| 71 | $this->raw = $this->charset_convert($this->raw); |
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| 72 | |
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| 73 | // find well-known address fields |
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| 74 | $this->displayname = $this->raw['FN'][0][0]; |
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| 75 | $this->surname = $this->raw['N'][0][0]; |
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| 76 | $this->firstname = $this->raw['N'][0][1]; |
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| 77 | $this->middlename = $this->raw['N'][0][2]; |
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| 78 | $this->nickname = $this->raw['NICKNAME'][0][0]; |
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| 79 | $this->organization = $this->raw['ORG'][0][0]; |
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| 80 | $this->business = ($this->raw['X-ABSHOWAS'][0][0] == 'COMPANY') || (join('', (array)$this->raw['N'][0]) == '' && !empty($this->organization)); |
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| 81 | |
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| 82 | foreach ((array)$this->raw['EMAIL'] as $i => $raw_email) |
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| 83 | $this->email[$i] = is_array($raw_email) ? $raw_email[0] : $raw_email; |
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| 84 | |
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| 85 | // make the pref e-mail address the first entry in $this->email |
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| 86 | $pref_index = $this->get_type_index('EMAIL', 'pref'); |
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| 87 | if ($pref_index > 0) { |
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| 88 | $tmp = $this->email[0]; |
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| 89 | $this->email[0] = $this->email[$pref_index]; |
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| 90 | $this->email[$pref_index] = $tmp; |
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| 91 | } |
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| 92 | |
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| 93 | // make sure displayname is not empty (required by RFC2426) |
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| 94 | if (!strlen($this->displayname)) { |
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| 95 | // the same method is used in steps/mail/addcontact.inc |
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| 96 | $this->displayname = ucfirst(preg_replace('/[\.\-]/', ' ', |
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| 97 | substr($this->email[0], 0, strpos($this->email[0], '@')))); |
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| 98 | } |
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| 99 | } |
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| 100 | |
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| 101 | |
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| 102 | /** |
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| 103 | * Return vCard data as associative array to be unsed in Roundcube address books |
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| 104 | * |
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| 105 | * @return array Hash array with key-value pairs |
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| 106 | */ |
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| 107 | public function get_assoc() |
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| 108 | { |
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| 109 | $out = array('name' => $this->displayname); |
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| 110 | $typemap = $this->typemap; |
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| 111 | |
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| 112 | // copy name fields to output array |
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| 113 | foreach (array('firstname','surname','middlename','nickname','organization') as $col) |
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| 114 | $out[$col] = $this->$col; |
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| 115 | |
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| 116 | $out['prefix'] = $this->raw['N'][0][3]; |
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| 117 | $out['suffix'] = $this->raw['N'][0][4]; |
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| 118 | |
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| 119 | // convert from raw vcard data into associative data for Roundcube |
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| 120 | foreach (array_flip($this->fieldmap) as $tag => $col) { |
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| 121 | foreach ((array)$this->raw[$tag] as $i => $raw) { |
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| 122 | if (is_array($raw)) { |
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| 123 | $k = -1; |
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| 124 | $key = $col; |
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| 125 | $subtype = $typemap[$raw['type'][++$k]] ?: strtolower($raw['type'][$k]); |
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| 126 | while ($k < count($raw['type']) && ($subtype == 'internet' || $subtype == 'pref')) |
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| 127 | $subtype = $typemap[$raw['type'][++$k]] ?: strtolower($raw['type'][$k]); |
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| 128 | if ($subtype) |
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| 129 | $key .= ':' . $subtype; |
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| 130 | |
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| 131 | // split ADR values into assoc array |
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| 132 | if ($tag == 'ADR') { |
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| 133 | list(,, $value['street'], $value['locality'], $value['region'], $value['zipcode'], $value['country']) = $raw; |
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| 134 | $out[$key][] = $value; |
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| 135 | } |
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| 136 | else |
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| 137 | $out[$key][] = $raw[0]; |
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| 138 | } |
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| 139 | else { |
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| 140 | $out[$col][] = $raw; |
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| 141 | } |
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| 142 | } |
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| 143 | } |
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| 144 | |
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| 145 | // handle special IM fields as used by Apple |
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| 146 | foreach ($this->immap as $tag => $type) { |
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| 147 | foreach ((array)$this->raw[$tag] as $i => $raw) { |
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| 148 | $out['im:'.$type][] = $raw[0]; |
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| 149 | } |
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| 150 | } |
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| 151 | |
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| 152 | return $out; |
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| 153 | } |
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| 154 | |
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| 155 | |
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| 156 | /** |
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| 157 | * Convert the data structure into a vcard 3.0 string |
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| 158 | */ |
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| 159 | public function export() |
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| 160 | { |
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| 161 | return self::rfc2425_fold(self::vcard_encode($this->raw)); |
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| 162 | } |
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| 163 | |
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| 164 | |
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| 165 | /** |
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| 166 | * Clear the given fields in the loaded vcard data |
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| 167 | * |
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| 168 | * @param array List of field names to be reset |
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| 169 | */ |
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| 170 | public function reset($fields = null) |
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| 171 | { |
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| 172 | if (!$fields) |
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| 173 | $fields = array_merge(array_values($this->fieldmap), array_keys($this->immap), array('FN','N','ORG','NICKNAME','EMAIL','ADR','BDAY')); |
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| 174 | |
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| 175 | foreach ($fields as $f) |
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| 176 | unset($this->raw[$f]); |
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| 177 | |
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| 178 | if (!$this->raw['N']) |
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| 179 | $this->raw['N'] = array(array('','','','','')); |
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| 180 | if (!$this->raw['FN']) |
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| 181 | $this->raw['FN'] = array(); |
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| 182 | |
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| 183 | $this->email = array(); |
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| 184 | } |
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| 185 | |
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| 186 | |
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| 187 | /** |
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| 188 | * Setter for address record fields |
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| 189 | * |
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| 190 | * @param string Field name |
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| 191 | * @param string Field value |
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| 192 | * @param string Type/section name |
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| 193 | */ |
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| 194 | public function set($field, $value, $type = 'HOME') |
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| 195 | { |
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| 196 | $typemap = array_flip($this->typemap); |
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| 197 | |
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| 198 | switch ($field) { |
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| 199 | case 'name': |
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| 200 | case 'displayname': |
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| 201 | $this->raw['FN'][0][0] = $value; |
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| 202 | break; |
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| 203 | |
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| 204 | case 'surname': |
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| 205 | $this->raw['N'][0][0] = $value; |
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| 206 | break; |
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| 207 | |
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| 208 | case 'firstname': |
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| 209 | $this->raw['N'][0][1] = $value; |
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| 210 | break; |
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| 211 | |
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| 212 | case 'middlename': |
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| 213 | $this->raw['N'][0][2] = $value; |
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| 214 | break; |
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| 215 | |
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| 216 | case 'prefix': |
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| 217 | $this->raw['N'][0][3] = $value; |
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| 218 | break; |
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| 219 | |
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| 220 | case 'suffix': |
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| 221 | $this->raw['N'][0][4] = $value; |
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| 222 | break; |
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| 223 | |
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| 224 | case 'nickname': |
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| 225 | $this->raw['NICKNAME'][0][0] = $value; |
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| 226 | break; |
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| 227 | |
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| 228 | case 'organization': |
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| 229 | $this->raw['ORG'][0][0] = $value; |
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| 230 | break; |
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| 231 | |
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| 232 | case 'email': |
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| 233 | $this->raw['EMAIL'][] = array(0 => $value, 'type' => array_filter(array('INTERNET', $type))); |
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| 234 | $this->email[] = $value; |
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| 235 | break; |
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| 236 | |
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| 237 | case 'im': |
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| 238 | // save IM subtypes into extension fields |
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| 239 | $typemap = array_flip($this->immap); |
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| 240 | if ($field = $typemap[strtolower($type)]) |
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| 241 | $this->raw[$field][] = array(0 => $value); |
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| 242 | break; |
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| 243 | |
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| 244 | case 'birthday': |
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| 245 | if ($val = @strtotime($value)) |
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| 246 | $this->raw['BDAY'][] = array(0 => date('Y-m-d', $val), 'value' => array('date')); |
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| 247 | break; |
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| 248 | |
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| 249 | case 'address': |
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| 250 | $value = $value[0] ? $value : array('', '', $value['street'], $value['locality'], $value['region'], $value['zipcode'], $value['country']); |
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| 251 | // fall through if not empty |
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| 252 | if (!strlen(join('', $value))) |
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| 253 | break; |
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| 254 | |
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| 255 | default: |
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| 256 | if ($tag = $this->fieldmap[$field]) { |
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| 257 | $index = count($this->raw[$tag]); |
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| 258 | $this->raw[$tag][$index] = (array)$value; |
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| 259 | if ($type) |
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| 260 | $this->raw[$tag][$index]['type'] = array(($typemap[$type] ?: $type)); |
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| 261 | } |
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| 262 | break; |
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| 263 | } |
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| 264 | } |
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| 265 | |
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| 266 | |
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| 267 | /** |
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| 268 | * Find index with the '$type' attribute |
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| 269 | * |
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| 270 | * @param string Field name |
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| 271 | * @return int Field index having $type set |
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| 272 | */ |
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| 273 | private function get_type_index($field, $type = 'pref') |
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| 274 | { |
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| 275 | $result = 0; |
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| 276 | if ($this->raw[$field]) { |
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| 277 | foreach ($this->raw[$field] as $i => $data) { |
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| 278 | if (is_array($data['type']) && in_array_nocase('pref', $data['type'])) |
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| 279 | $result = $i; |
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| 280 | } |
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| 281 | } |
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| 282 | |
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| 283 | return $result; |
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| 284 | } |
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| 285 | |
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| 286 | |
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| 287 | /** |
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| 288 | * Convert a whole vcard (array) to UTF-8. |
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| 289 | * Each member value that has a charset parameter will be converted. |
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| 290 | */ |
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| 291 | private function charset_convert($card) |
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| 292 | { |
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| 293 | foreach ($card as $key => $node) { |
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| 294 | foreach ($node as $i => $subnode) { |
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| 295 | if (is_array($subnode) && $subnode['charset'] && ($charset = $subnode['charset'][0])) { |
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| 296 | foreach ($subnode as $j => $value) { |
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| 297 | if (is_numeric($j) && is_string($value)) |
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| 298 | $card[$key][$i][$j] = rcube_charset_convert($value, $charset); |
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| 299 | } |
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| 300 | unset($card[$key][$i]['charset']); |
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| 301 | } |
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| 302 | } |
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| 303 | } |
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| 304 | |
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| 305 | return $card; |
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| 306 | } |
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| 307 | |
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| 308 | |
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| 309 | /** |
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| 310 | * Factory method to import a vcard file |
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| 311 | * |
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| 312 | * @param string vCard file content |
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| 313 | * @return array List of rcube_vcard objects |
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| 314 | */ |
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| 315 | public static function import($data) |
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| 316 | { |
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| 317 | $out = array(); |
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| 318 | |
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| 319 | // check if charsets are specified (usually vcard version < 3.0 but this is not reliable) |
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| 320 | if (preg_match('/charset=/i', substr($data, 0, 2048))) |
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| 321 | $charset = null; |
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| 322 | // detect charset and convert to utf-8 |
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| 323 | else if (($charset = self::detect_encoding($data)) && $charset != RCMAIL_CHARSET) { |
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| 324 | $data = rcube_charset_convert($data, $charset); |
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| 325 | $data = preg_replace(array('/^[\xFE\xFF]{2}/', '/^\xEF\xBB\xBF/', '/^\x00+/'), '', $data); // also remove BOM |
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| 326 | $charset = RCMAIL_CHARSET; |
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| 327 | } |
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| 328 | |
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| 329 | $vcard_block = ''; |
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| 330 | $in_vcard_block = false; |
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| 331 | |
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| 332 | foreach (preg_split("/[\r\n]+/", $data) as $i => $line) { |
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| 333 | if ($in_vcard_block && !empty($line)) |
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| 334 | $vcard_block .= $line . "\n"; |
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| 335 | |
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| 336 | $line = trim($line); |
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| 337 | |
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| 338 | if (preg_match('/^END:VCARD$/i', $line)) { |
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| 339 | // parse vcard |
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| 340 | $obj = new rcube_vcard(self::cleanup($vcard_block), $charset); |
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| 341 | if (!empty($obj->displayname)) |
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| 342 | $out[] = $obj; |
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| 343 | |
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| 344 | $in_vcard_block = false; |
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| 345 | } |
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| 346 | else if (preg_match('/^BEGIN:VCARD$/i', $line)) { |
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| 347 | $vcard_block = $line . "\n"; |
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| 348 | $in_vcard_block = true; |
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| 349 | } |
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| 350 | } |
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| 351 | |
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| 352 | return $out; |
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| 353 | } |
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| 354 | |
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| 355 | |
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| 356 | /** |
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| 357 | * Normalize vcard data for better parsing |
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| 358 | * |
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| 359 | * @param string vCard block |
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| 360 | * @return string Cleaned vcard block |
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| 361 | */ |
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| 362 | private static function cleanup($vcard) |
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| 363 | { |
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| 364 | // Convert special types (like Skype) to normal type='skype' classes with this simple regex ;) |
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| 365 | $vcard = preg_replace( |
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| 366 | '/item(\d+)\.(TEL|URL)([^:]*?):(.*?)item\1.X-ABLabel:(?:_\$!<)?([\w-() ]*)(?:>!\$_)?./s', |
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| 367 | '\2;type=\5\3:\4', |
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| 368 | $vcard); |
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| 369 | |
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| 370 | // Remove cruft like item1.X-AB*, item1.ADR instead of ADR, and empty lines |
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| 371 | $vcard = preg_replace(array('/^item\d*\.X-AB.*$/m', '/^item\d*\./m', "/\n+/"), array('', '', "\n"), $vcard); |
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| 372 | |
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| 373 | // if N doesn't have any semicolons, add some |
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| 374 | $vcard = preg_replace('/^(N:[^;\R]*)$/m', '\1;;;;', $vcard); |
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| 375 | |
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| 376 | return $vcard; |
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| 377 | } |
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| 378 | |
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| 379 | private static function rfc2425_fold_callback($matches) |
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| 380 | { |
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| 381 | return ":\n ".rtrim(chunk_split($matches[1], 72, "\n ")); |
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| 382 | } |
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| 383 | |
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| 384 | private static function rfc2425_fold($val) |
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| 385 | { |
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| 386 | return preg_replace_callback('/:([^\n]{72,})/', array('self', 'rfc2425_fold_callback'), $val) . "\n"; |
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| 387 | } |
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| 388 | |
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| 389 | |
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| 390 | /** |
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| 391 | * Decodes a vcard block (vcard 3.0 format, unfolded) |
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| 392 | * into an array structure |
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| 393 | * |
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| 394 | * @param string vCard block to parse |
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| 395 | * @return array Raw data structure |
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| 396 | */ |
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| 397 | private static function vcard_decode($vcard) |
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| 398 | { |
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| 399 | // Perform RFC2425 line unfolding |
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| 400 | $vcard = preg_replace(array("/\r/", "/\n\s+/"), '', $vcard); |
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| 401 | |
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| 402 | $lines = preg_split('/\r?\n/', $vcard); |
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| 403 | $data = array(); |
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| 404 | |
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| 405 | for ($i=0; $i < count($lines); $i++) { |
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| 406 | if (!preg_match('/^([^\\:]*):(.+)$/', $lines[$i], $line)) |
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| 407 | continue; |
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| 408 | |
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| 409 | // convert 2.1-style "EMAIL;internet;home:" to 3.0-style "EMAIL;TYPE=internet;TYPE=home:" |
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| 410 | if (($data['VERSION'][0] == "2.1") && preg_match('/^([^;]+);([^:]+)/', $line[1], $regs2) && !preg_match('/^TYPE=/i', $regs2[2])) { |
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| 411 | $line[1] = $regs2[1]; |
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| 412 | foreach (explode(';', $regs2[2]) as $prop) |
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| 413 | $line[1] .= ';' . (strpos($prop, '=') ? $prop : 'TYPE='.$prop); |
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| 414 | } |
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| 415 | |
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| 416 | if (!preg_match('/^(BEGIN|END)$/i', $line[1]) && preg_match_all('/([^\\;]+);?/', $line[1], $regs2)) { |
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| 417 | $entry = array(); |
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| 418 | $field = strtoupper($regs2[1][0]); |
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| 419 | |
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| 420 | foreach($regs2[1] as $attrid => $attr) { |
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| 421 | if ((list($key, $value) = explode('=', $attr)) && $value) { |
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| 422 | $value = trim($value); |
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| 423 | if ($key == 'ENCODING') { |
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| 424 | // add next line(s) to value string if QP line end detected |
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| 425 | while ($value == 'QUOTED-PRINTABLE' && preg_match('/=$/', $lines[$i])) |
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| 426 | $line[2] .= "\n" . $lines[++$i]; |
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| 427 | |
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| 428 | $line[2] = self::decode_value($line[2], $value); |
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| 429 | } |
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| 430 | else |
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| 431 | $entry[strtolower($key)] = array_merge((array)$entry[strtolower($key)], (array)self::vcard_unquote($value, ',')); |
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| 432 | } |
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| 433 | else if ($attrid > 0) { |
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| 434 | $entry[$key] = true; // true means attr without =value |
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| 435 | } |
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| 436 | } |
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| 437 | |
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| 438 | $entry = array_merge($entry, (array)self::vcard_unquote($line[2])); |
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| 439 | $data[$field][] = $entry; |
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| 440 | } |
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| 441 | } |
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| 442 | |
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| 443 | unset($data['VERSION']); |
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| 444 | return $data; |
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| 445 | } |
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| 446 | |
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| 447 | |
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| 448 | /** |
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| 449 | * Split quoted string |
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| 450 | * |
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| 451 | * @param string vCard string to split |
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| 452 | * @param string Separator char/string |
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| 453 | * @return array List with splitted values |
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| 454 | */ |
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| 455 | private static function vcard_unquote($s, $sep = ';') |
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| 456 | { |
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| 457 | // break string into parts separated by $sep, but leave escaped $sep alone |
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| 458 | if (count($parts = explode($sep, strtr($s, array("\\$sep" => "\007")))) > 1) { |
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| 459 | foreach($parts as $s) { |
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| 460 | $result[] = self::vcard_unquote(strtr($s, array("\007" => "\\$sep")), $sep); |
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| 461 | } |
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| 462 | return $result; |
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| 463 | } |
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| 464 | else { |
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| 465 | return strtr($s, array("\r" => '', '\\\\' => '\\', '\n' => "\n", '\,' => ',', '\;' => ';', '\:' => ':')); |
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| 466 | } |
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| 467 | } |
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| 468 | |
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| 469 | |
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| 470 | /** |
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| 471 | * Decode a given string with the encoding rule from ENCODING attributes |
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| 472 | * |
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| 473 | * @param string String to decode |
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| 474 | * @param string Encoding type (quoted-printable and base64 supported) |
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| 475 | * @return string Decoded 8bit value |
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| 476 | */ |
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| 477 | private static function decode_value($value, $encoding) |
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| 478 | { |
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| 479 | switch (strtolower($encoding)) { |
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| 480 | case 'quoted-printable': |
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| 481 | return quoted_printable_decode($value); |
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| 482 | |
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| 483 | case 'base64': |
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| 484 | return base64_decode($value); |
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| 485 | |
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| 486 | default: |
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| 487 | return $value; |
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| 488 | } |
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| 489 | } |
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| 490 | |
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| 491 | |
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| 492 | /** |
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| 493 | * Encodes an entry for storage in our database (vcard 3.0 format, unfolded) |
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| 494 | * |
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| 495 | * @param array Raw data structure to encode |
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| 496 | * @return string vCard encoded string |
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| 497 | */ |
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| 498 | static function vcard_encode($data) |
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| 499 | { |
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| 500 | foreach((array)$data as $type => $entries) { |
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| 501 | /* valid N has 5 properties */ |
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| 502 | while ($type == "N" && is_array($entries[0]) && count($entries[0]) < 5) |
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| 503 | $entries[0][] = ""; |
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| 504 | |
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| 505 | foreach((array)$entries as $entry) { |
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| 506 | $attr = ''; |
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| 507 | if (is_array($entry)) { |
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| 508 | $value = array(); |
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| 509 | foreach($entry as $attrname => $attrvalues) { |
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| 510 | if (is_int($attrname)) |
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| 511 | $value[] = $attrvalues; |
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| 512 | elseif ($attrvalues === true) |
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| 513 | $attr .= ";$attrname"; // true means just tag, not tag=value, as in PHOTO;BASE64:... |
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| 514 | else { |
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| 515 | foreach((array)$attrvalues as $attrvalue) |
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| 516 | $attr .= ";$attrname=" . self::vcard_quote($attrvalue, ','); |
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| 517 | } |
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| 518 | } |
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| 519 | } |
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| 520 | else { |
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| 521 | $value = $entry; |
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| 522 | } |
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| 523 | |
|---|
| 524 | $vcard .= self::vcard_quote($type) . $attr . ':' . self::vcard_quote($value) . "\n"; |
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| 525 | } |
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| 526 | } |
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| 527 | |
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| 528 | return "BEGIN:VCARD\nVERSION:3.0\n{$vcard}END:VCARD"; |
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| 529 | } |
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| 530 | |
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| 531 | |
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| 532 | /** |
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| 533 | * Join indexed data array to a vcard quoted string |
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| 534 | * |
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| 535 | * @param array Field data |
|---|
| 536 | * @param string Separator |
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| 537 | * @return string Joined and quoted string |
|---|
| 538 | */ |
|---|
| 539 | private static function vcard_quote($s, $sep = ';') |
|---|
| 540 | { |
|---|
| 541 | if (is_array($s)) { |
|---|
| 542 | foreach($s as $part) { |
|---|
| 543 | $r[] = self::vcard_quote($part, $sep); |
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| 544 | } |
|---|
| 545 | return(implode($sep, (array)$r)); |
|---|
| 546 | } |
|---|
| 547 | else { |
|---|
| 548 | return strtr($s, array('\\' => '\\\\', "\r" => '', "\n" => '\n', ';' => '\;', ':' => '\:')); |
|---|
| 549 | } |
|---|
| 550 | } |
|---|
| 551 | |
|---|
| 552 | |
|---|
| 553 | /** |
|---|
| 554 | * Returns UNICODE type based on BOM (Byte Order Mark) |
|---|
| 555 | * |
|---|
| 556 | * @param string Input string to test |
|---|
| 557 | * @return string Detected encoding |
|---|
| 558 | */ |
|---|
| 559 | private static function detect_encoding($string) |
|---|
| 560 | { |
|---|
| 561 | if (substr($string, 0, 4) == "\0\0\xFE\xFF") return 'UTF-32BE'; // Big Endian |
|---|
| 562 | if (substr($string, 0, 4) == "\xFF\xFE\0\0") return 'UTF-32LE'; // Little Endian |
|---|
| 563 | if (substr($string, 0, 2) == "\xFE\xFF") return 'UTF-16BE'; // Big Endian |
|---|
| 564 | if (substr($string, 0, 2) == "\xFF\xFE") return 'UTF-16LE'; // Little Endian |
|---|
| 565 | if (substr($string, 0, 3) == "\xEF\xBB\xBF") return 'UTF-8'; |
|---|
| 566 | |
|---|
| 567 | // use mb_detect_encoding() |
|---|
| 568 | $encodings = array('UTF-8', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3', |
|---|
| 569 | 'ISO-8859-4', 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9', |
|---|
| 570 | 'ISO-8859-10', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16', |
|---|
| 571 | 'WINDOWS-1252', 'WINDOWS-1251', 'BIG5', 'GB2312'); |
|---|
| 572 | |
|---|
| 573 | if (function_exists('mb_detect_encoding') && ($enc = mb_detect_encoding($string, $encodings))) |
|---|
| 574 | return $enc; |
|---|
| 575 | |
|---|
| 576 | // No match, check for UTF-8 |
|---|
| 577 | // from http://w3.org/International/questions/qa-forms-utf-8.html |
|---|
| 578 | if (preg_match('/\A( |
|---|
| 579 | [\x09\x0A\x0D\x20-\x7E] |
|---|
| 580 | | [\xC2-\xDF][\x80-\xBF] |
|---|
| 581 | | \xE0[\xA0-\xBF][\x80-\xBF] |
|---|
| 582 | | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} |
|---|
| 583 | | \xED[\x80-\x9F][\x80-\xBF] |
|---|
| 584 | | \xF0[\x90-\xBF][\x80-\xBF]{2} |
|---|
| 585 | | [\xF1-\xF3][\x80-\xBF]{3} |
|---|
| 586 | | \xF4[\x80-\x8F][\x80-\xBF]{2} |
|---|
| 587 | )*\z/xs', substr($string, 0, 2048))) |
|---|
| 588 | return 'UTF-8'; |
|---|
| 589 | |
|---|
| 590 | return rcmail::get_instance()->config->get('default_charset', 'ISO-8859-1'); # fallback to Latin-1 |
|---|
| 591 | } |
|---|
| 592 | |
|---|
| 593 | } |
|---|
| 594 | |
|---|
| 595 | |
|---|