You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
659 lines
20 KiB
PHP
659 lines
20 KiB
PHP
<?php
|
|
|
|
/*
|
|
+-----------------------------------------------------------------------+
|
|
| program/include/rcube_vcard.php |
|
|
| |
|
|
| This file is part of the Roundcube Webmail client |
|
|
| Copyright (C) 2008-2011, The Roundcube Dev Team |
|
|
| Licensed under the GNU GPL |
|
|
| |
|
|
| PURPOSE: |
|
|
| Logical representation of a vcard address record |
|
|
+-----------------------------------------------------------------------+
|
|
| Author: Thomas Bruederli <roundcube@gmail.com> |
|
|
+-----------------------------------------------------------------------+
|
|
|
|
$Id$
|
|
|
|
*/
|
|
|
|
|
|
/**
|
|
* Logical representation of a vcard-based address record
|
|
* Provides functions to parse and export vCard data format
|
|
*
|
|
* @package Addressbook
|
|
* @author Thomas Bruederli <roundcube@gmail.com>
|
|
*/
|
|
class rcube_vcard
|
|
{
|
|
private static $values_decoded = false;
|
|
private $raw = array(
|
|
'FN' => array(),
|
|
'N' => array(array('','','','','')),
|
|
);
|
|
private $fieldmap = array(
|
|
'phone' => 'TEL',
|
|
'birthday' => 'BDAY',
|
|
'website' => 'URL',
|
|
'notes' => 'NOTE',
|
|
'email' => 'EMAIL',
|
|
'address' => 'ADR',
|
|
'gender' => 'X-GENDER',
|
|
'maidenname' => 'X-MAIDENNAME',
|
|
'anniversary' => 'X-ANNIVERSARY',
|
|
'assistant' => 'X-ASSISTANT',
|
|
'manager' => 'X-MANAGER',
|
|
'spouse' => 'X-SPOUSE',
|
|
);
|
|
private $typemap = array('iPhone' => 'mobile', 'CELL' => 'mobile');
|
|
private $phonetypemap = array('HOME1' => 'HOME', 'BUSINESS1' => 'WORK', 'BUSINESS2' => 'WORK2', 'WORKFAX' => 'BUSINESSFAX');
|
|
private $addresstypemap = array('BUSINESS' => 'WORK');
|
|
private $immap = array('X-JABBER' => 'jabber', 'X-ICQ' => 'icq', 'X-MSN' => 'msn', 'X-AIM' => 'aim', 'X-YAHOO' => 'yahoo', 'X-SKYPE' => 'skype', 'X-SKYPE-USERNAME' => 'skype');
|
|
|
|
public $business = false;
|
|
public $displayname;
|
|
public $surname;
|
|
public $firstname;
|
|
public $middlename;
|
|
public $nickname;
|
|
public $organization;
|
|
public $notes;
|
|
public $email = array();
|
|
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
public function __construct($vcard = null, $charset = RCMAIL_CHARSET, $detect = false)
|
|
{
|
|
if (!empty($vcard))
|
|
$this->load($vcard, $charset, $detect);
|
|
}
|
|
|
|
|
|
/**
|
|
* Load record from (internal, unfolded) vcard 3.0 format
|
|
*
|
|
* @param string vCard string to parse
|
|
* @param string Charset of string values
|
|
* @param boolean True if loading a 'foreign' vcard and extra heuristics for charset detection is required
|
|
*/
|
|
public function load($vcard, $charset = RCMAIL_CHARSET, $detect = false)
|
|
{
|
|
self::$values_decoded = false;
|
|
$this->raw = self::vcard_decode($vcard);
|
|
|
|
// resolve charset parameters
|
|
if ($charset == null) {
|
|
$this->raw = self::charset_convert($this->raw);
|
|
}
|
|
// vcard has encoded values and charset should be detected
|
|
else if ($detect && self::$values_decoded &&
|
|
($detected_charset = self::detect_encoding(self::vcard_encode($this->raw))) && $detected_charset != RCMAIL_CHARSET) {
|
|
$this->raw = self::charset_convert($this->raw, $detected_charset);
|
|
}
|
|
|
|
// find well-known address fields
|
|
$this->displayname = $this->raw['FN'][0][0];
|
|
$this->surname = $this->raw['N'][0][0];
|
|
$this->firstname = $this->raw['N'][0][1];
|
|
$this->middlename = $this->raw['N'][0][2];
|
|
$this->nickname = $this->raw['NICKNAME'][0][0];
|
|
$this->organization = $this->raw['ORG'][0][0];
|
|
$this->business = ($this->raw['X-ABSHOWAS'][0][0] == 'COMPANY') || (join('', (array)$this->raw['N'][0]) == '' && !empty($this->organization));
|
|
|
|
foreach ((array)$this->raw['EMAIL'] as $i => $raw_email)
|
|
$this->email[$i] = is_array($raw_email) ? $raw_email[0] : $raw_email;
|
|
|
|
// make the pref e-mail address the first entry in $this->email
|
|
$pref_index = $this->get_type_index('EMAIL', 'pref');
|
|
if ($pref_index > 0) {
|
|
$tmp = $this->email[0];
|
|
$this->email[0] = $this->email[$pref_index];
|
|
$this->email[$pref_index] = $tmp;
|
|
}
|
|
|
|
// make sure displayname is not empty (required by RFC2426)
|
|
if (!strlen($this->displayname)) {
|
|
// the same method is used in steps/mail/addcontact.inc
|
|
$this->displayname = ucfirst(preg_replace('/[\.\-]/', ' ',
|
|
substr($this->email[0], 0, strpos($this->email[0], '@'))));
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Return vCard data as associative array to be unsed in Roundcube address books
|
|
*
|
|
* @return array Hash array with key-value pairs
|
|
*/
|
|
public function get_assoc()
|
|
{
|
|
$out = array('name' => $this->displayname);
|
|
$typemap = $this->typemap;
|
|
|
|
// copy name fields to output array
|
|
foreach (array('firstname','surname','middlename','nickname','organization') as $col)
|
|
$out[$col] = $this->$col;
|
|
|
|
$out['prefix'] = $this->raw['N'][0][3];
|
|
$out['suffix'] = $this->raw['N'][0][4];
|
|
|
|
// convert from raw vcard data into associative data for Roundcube
|
|
foreach (array_flip($this->fieldmap) as $tag => $col) {
|
|
foreach ((array)$this->raw[$tag] as $i => $raw) {
|
|
if (is_array($raw)) {
|
|
$k = -1;
|
|
$key = $col;
|
|
|
|
$subtype = $typemap[$raw['type'][++$k]] ? $typemap[$raw['type'][$k]] : strtolower($raw['type'][$k]);
|
|
while ($k < count($raw['type']) && ($subtype == 'internet' || $subtype == 'pref'))
|
|
$subtype = $typemap[$raw['type'][++$k]] ? $typemap[$raw['type'][$k]] : strtolower($raw['type'][$k]);
|
|
|
|
// read vcard 2.1 subtype
|
|
if (!$subtype) {
|
|
foreach ($raw as $k => $v) {
|
|
if (!is_numeric($k) && $v === true && !in_array(strtolower($k), array('pref','internet','voice','base64'))) {
|
|
$subtype = $typemap[$k] ? $typemap[$k] : strtolower($k);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($subtype)
|
|
$key .= ':' . $subtype;
|
|
|
|
// split ADR values into assoc array
|
|
if ($tag == 'ADR') {
|
|
list(,, $value['street'], $value['locality'], $value['region'], $value['zipcode'], $value['country']) = $raw;
|
|
$out[$key][] = $value;
|
|
}
|
|
else
|
|
$out[$key][] = $raw[0];
|
|
}
|
|
else {
|
|
$out[$col][] = $raw;
|
|
}
|
|
}
|
|
}
|
|
|
|
// handle special IM fields as used by Apple
|
|
foreach ($this->immap as $tag => $type) {
|
|
foreach ((array)$this->raw[$tag] as $i => $raw) {
|
|
$out['im:'.$type][] = $raw[0];
|
|
}
|
|
}
|
|
|
|
// copy photo data
|
|
if ($this->raw['PHOTO'])
|
|
$out['photo'] = $this->raw['PHOTO'][0][0];
|
|
|
|
return $out;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convert the data structure into a vcard 3.0 string
|
|
*/
|
|
public function export()
|
|
{
|
|
return self::rfc2425_fold(self::vcard_encode($this->raw));
|
|
}
|
|
|
|
|
|
/**
|
|
* Clear the given fields in the loaded vcard data
|
|
*
|
|
* @param array List of field names to be reset
|
|
*/
|
|
public function reset($fields = null)
|
|
{
|
|
if (!$fields)
|
|
$fields = array_merge(array_values($this->fieldmap), array_keys($this->immap), array('FN','N','ORG','NICKNAME','EMAIL','ADR','BDAY'));
|
|
|
|
foreach ($fields as $f)
|
|
unset($this->raw[$f]);
|
|
|
|
if (!$this->raw['N'])
|
|
$this->raw['N'] = array(array('','','','',''));
|
|
if (!$this->raw['FN'])
|
|
$this->raw['FN'] = array();
|
|
|
|
$this->email = array();
|
|
}
|
|
|
|
|
|
/**
|
|
* Setter for address record fields
|
|
*
|
|
* @param string Field name
|
|
* @param string Field value
|
|
* @param string Type/section name
|
|
*/
|
|
public function set($field, $value, $type = 'HOME')
|
|
{
|
|
$field = strtolower($field);
|
|
$type = strtoupper($type);
|
|
$typemap = array_flip($this->typemap);
|
|
|
|
switch ($field) {
|
|
case 'name':
|
|
case 'displayname':
|
|
$this->raw['FN'][0][0] = $value;
|
|
break;
|
|
|
|
case 'surname':
|
|
$this->raw['N'][0][0] = $value;
|
|
break;
|
|
|
|
case 'firstname':
|
|
$this->raw['N'][0][1] = $value;
|
|
break;
|
|
|
|
case 'middlename':
|
|
$this->raw['N'][0][2] = $value;
|
|
break;
|
|
|
|
case 'prefix':
|
|
$this->raw['N'][0][3] = $value;
|
|
break;
|
|
|
|
case 'suffix':
|
|
$this->raw['N'][0][4] = $value;
|
|
break;
|
|
|
|
case 'nickname':
|
|
$this->raw['NICKNAME'][0][0] = $value;
|
|
break;
|
|
|
|
case 'organization':
|
|
$this->raw['ORG'][0][0] = $value;
|
|
break;
|
|
|
|
case 'photo':
|
|
$encoded = !preg_match('![^a-z0-9/=+-]!i', $value);
|
|
$this->raw['PHOTO'][0] = array(0 => $encoded ? $value : base64_encode($value), 'BASE64' => true);
|
|
break;
|
|
|
|
case 'email':
|
|
$this->raw['EMAIL'][] = array(0 => $value, 'type' => array_filter(array('INTERNET', $type)));
|
|
$this->email[] = $value;
|
|
break;
|
|
|
|
case 'im':
|
|
// save IM subtypes into extension fields
|
|
$typemap = array_flip($this->immap);
|
|
if ($field = $typemap[strtolower($type)])
|
|
$this->raw[$field][] = array(0 => $value);
|
|
break;
|
|
|
|
case 'birthday':
|
|
if ($val = rcube_strtotime($value))
|
|
$this->raw['BDAY'][] = array(0 => date('Y-m-d', $val), 'value' => array('date'));
|
|
break;
|
|
|
|
case 'address':
|
|
if ($this->addresstypemap[$type])
|
|
$type = $this->addresstypemap[$type];
|
|
|
|
$value = $value[0] ? $value : array('', '', $value['street'], $value['locality'], $value['region'], $value['zipcode'], $value['country']);
|
|
|
|
// fall through if not empty
|
|
if (!strlen(join('', $value)))
|
|
break;
|
|
|
|
default:
|
|
if ($field == 'phone' && $this->phonetypemap[$type])
|
|
$type = $this->phonetypemap[$type];
|
|
|
|
if (($tag = $this->fieldmap[$field]) && (is_array($value) || strlen($value))) {
|
|
$index = count($this->raw[$tag]);
|
|
$this->raw[$tag][$index] = (array)$value;
|
|
if ($type)
|
|
$this->raw[$tag][$index]['type'] = array(($typemap[$type] ? $typemap[$type] : $type));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Find index with the '$type' attribute
|
|
*
|
|
* @param string Field name
|
|
* @return int Field index having $type set
|
|
*/
|
|
private function get_type_index($field, $type = 'pref')
|
|
{
|
|
$result = 0;
|
|
if ($this->raw[$field]) {
|
|
foreach ($this->raw[$field] as $i => $data) {
|
|
if (is_array($data['type']) && in_array_nocase('pref', $data['type']))
|
|
$result = $i;
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convert a whole vcard (array) to UTF-8.
|
|
* If $force_charset is null, each member value that has a charset parameter will be converted
|
|
*/
|
|
private static function charset_convert($card, $force_charset = null)
|
|
{
|
|
foreach ($card as $key => $node) {
|
|
foreach ($node as $i => $subnode) {
|
|
if (is_array($subnode) && (($charset = $force_charset) || ($subnode['charset'] && ($charset = $subnode['charset'][0])))) {
|
|
foreach ($subnode as $j => $value) {
|
|
if (is_numeric($j) && is_string($value))
|
|
$card[$key][$i][$j] = rcube_charset_convert($value, $charset);
|
|
}
|
|
unset($card[$key][$i]['charset']);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $card;
|
|
}
|
|
|
|
|
|
/**
|
|
* Factory method to import a vcard file
|
|
*
|
|
* @param string vCard file content
|
|
* @return array List of rcube_vcard objects
|
|
*/
|
|
public static function import($data)
|
|
{
|
|
$out = array();
|
|
|
|
// check if charsets are specified (usually vcard version < 3.0 but this is not reliable)
|
|
if (preg_match('/charset=/i', substr($data, 0, 2048)))
|
|
$charset = null;
|
|
// detect charset and convert to utf-8
|
|
else if (($charset = self::detect_encoding($data)) && $charset != RCMAIL_CHARSET) {
|
|
$data = rcube_charset_convert($data, $charset);
|
|
$data = preg_replace(array('/^[\xFE\xFF]{2}/', '/^\xEF\xBB\xBF/', '/^\x00+/'), '', $data); // also remove BOM
|
|
$charset = RCMAIL_CHARSET;
|
|
}
|
|
|
|
$vcard_block = '';
|
|
$in_vcard_block = false;
|
|
|
|
foreach (preg_split("/[\r\n]+/", $data) as $i => $line) {
|
|
if ($in_vcard_block && !empty($line))
|
|
$vcard_block .= $line . "\n";
|
|
|
|
$line = trim($line);
|
|
|
|
if (preg_match('/^END:VCARD$/i', $line)) {
|
|
// parse vcard
|
|
$obj = new rcube_vcard(self::cleanup($vcard_block), $charset, true);
|
|
if (!empty($obj->displayname))
|
|
$out[] = $obj;
|
|
|
|
$in_vcard_block = false;
|
|
}
|
|
else if (preg_match('/^BEGIN:VCARD$/i', $line)) {
|
|
$vcard_block = $line . "\n";
|
|
$in_vcard_block = true;
|
|
}
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
|
|
|
|
/**
|
|
* Normalize vcard data for better parsing
|
|
*
|
|
* @param string vCard block
|
|
* @return string Cleaned vcard block
|
|
*/
|
|
private static function cleanup($vcard)
|
|
{
|
|
// Convert special types (like Skype) to normal type='skype' classes with this simple regex ;)
|
|
$vcard = preg_replace(
|
|
'/item(\d+)\.(TEL|URL)([^:]*?):(.*?)item\1.X-ABLabel:(?:_\$!<)?([\w-() ]*)(?:>!\$_)?./s',
|
|
'\2;type=\5\3:\4',
|
|
$vcard);
|
|
|
|
// Remove cruft like item1.X-AB*, item1.ADR instead of ADR, and empty lines
|
|
$vcard = preg_replace(array('/^item\d*\.X-AB.*$/m', '/^item\d*\./m', "/\n+/"), array('', '', "\n"), $vcard);
|
|
|
|
// convert X-WAB-GENDER to X-GENDER
|
|
if (preg_match('/X-WAB-GENDER:(\d)/', $vcard, $matches)) {
|
|
$value = $matches[1] == '2' ? 'male' : 'female';
|
|
$vcard = preg_replace('/X-WAB-GENDER:\d/', 'X-GENDER:' . $value, $vcard);
|
|
}
|
|
|
|
// if N doesn't have any semicolons, add some
|
|
$vcard = preg_replace('/^(N:[^;\R]*)$/m', '\1;;;;', $vcard);
|
|
|
|
return $vcard;
|
|
}
|
|
|
|
private static function rfc2425_fold_callback($matches)
|
|
{
|
|
return ":\n ".rtrim(chunk_split($matches[1], 72, "\n "));
|
|
}
|
|
|
|
private static function rfc2425_fold($val)
|
|
{
|
|
return preg_replace_callback('/:([^\n]{72,})/', array('self', 'rfc2425_fold_callback'), $val) . "\n";
|
|
}
|
|
|
|
|
|
/**
|
|
* Decodes a vcard block (vcard 3.0 format, unfolded)
|
|
* into an array structure
|
|
*
|
|
* @param string vCard block to parse
|
|
* @return array Raw data structure
|
|
*/
|
|
private static function vcard_decode($vcard)
|
|
{
|
|
// Perform RFC2425 line unfolding
|
|
$vcard = preg_replace(array("/\r/", "/\n\s+/"), '', $vcard);
|
|
|
|
$lines = preg_split('/\r?\n/', $vcard);
|
|
$data = array();
|
|
|
|
for ($i=0; $i < count($lines); $i++) {
|
|
if (!preg_match('/^([^\\:]*):(.+)$/', $lines[$i], $line))
|
|
continue;
|
|
|
|
// convert 2.1-style "EMAIL;internet;home:" to 3.0-style "EMAIL;TYPE=internet;TYPE=home:"
|
|
if (($data['VERSION'][0] == "2.1") && preg_match('/^([^;]+);([^:]+)/', $line[1], $regs2) && !preg_match('/^TYPE=/i', $regs2[2])) {
|
|
$line[1] = $regs2[1];
|
|
foreach (explode(';', $regs2[2]) as $prop)
|
|
$line[1] .= ';' . (strpos($prop, '=') ? $prop : 'TYPE='.$prop);
|
|
}
|
|
|
|
if (!preg_match('/^(BEGIN|END)$/i', $line[1]) && preg_match_all('/([^\\;]+);?/', $line[1], $regs2)) {
|
|
$entry = array();
|
|
$field = strtoupper($regs2[1][0]);
|
|
|
|
foreach($regs2[1] as $attrid => $attr) {
|
|
if ((list($key, $value) = explode('=', $attr)) && $value) {
|
|
$value = trim($value);
|
|
if ($key == 'ENCODING') {
|
|
// add next line(s) to value string if QP line end detected
|
|
while ($value == 'QUOTED-PRINTABLE' && preg_match('/=$/', $lines[$i]))
|
|
$line[2] .= "\n" . $lines[++$i];
|
|
|
|
$line[2] = self::decode_value($line[2], $value);
|
|
}
|
|
else
|
|
$entry[strtolower($key)] = array_merge((array)$entry[strtolower($key)], (array)self::vcard_unquote($value, ','));
|
|
}
|
|
else if ($attrid > 0) {
|
|
$entry[$key] = true; // true means attr without =value
|
|
}
|
|
}
|
|
|
|
$entry = array_merge($entry, (array)self::vcard_unquote($line[2]));
|
|
$data[$field][] = $entry;
|
|
}
|
|
}
|
|
|
|
unset($data['VERSION']);
|
|
return $data;
|
|
}
|
|
|
|
|
|
/**
|
|
* Split quoted string
|
|
*
|
|
* @param string vCard string to split
|
|
* @param string Separator char/string
|
|
* @return array List with splitted values
|
|
*/
|
|
private static function vcard_unquote($s, $sep = ';')
|
|
{
|
|
// break string into parts separated by $sep, but leave escaped $sep alone
|
|
if (count($parts = explode($sep, strtr($s, array("\\$sep" => "\007")))) > 1) {
|
|
foreach($parts as $s) {
|
|
$result[] = self::vcard_unquote(strtr($s, array("\007" => "\\$sep")), $sep);
|
|
}
|
|
return $result;
|
|
}
|
|
else {
|
|
return strtr($s, array("\r" => '', '\\\\' => '\\', '\n' => "\n", '\,' => ',', '\;' => ';', '\:' => ':'));
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Decode a given string with the encoding rule from ENCODING attributes
|
|
*
|
|
* @param string String to decode
|
|
* @param string Encoding type (quoted-printable and base64 supported)
|
|
* @return string Decoded 8bit value
|
|
*/
|
|
private static function decode_value($value, $encoding)
|
|
{
|
|
switch (strtolower($encoding)) {
|
|
case 'quoted-printable':
|
|
self::$values_decoded = true;
|
|
return quoted_printable_decode($value);
|
|
|
|
case 'base64':
|
|
self::$values_decoded = true;
|
|
return base64_decode($value);
|
|
|
|
default:
|
|
return $value;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Encodes an entry for storage in our database (vcard 3.0 format, unfolded)
|
|
*
|
|
* @param array Raw data structure to encode
|
|
* @return string vCard encoded string
|
|
*/
|
|
static function vcard_encode($data)
|
|
{
|
|
foreach((array)$data as $type => $entries) {
|
|
/* valid N has 5 properties */
|
|
while ($type == "N" && is_array($entries[0]) && count($entries[0]) < 5)
|
|
$entries[0][] = "";
|
|
|
|
foreach((array)$entries as $entry) {
|
|
$attr = '';
|
|
if (is_array($entry)) {
|
|
$value = array();
|
|
foreach($entry as $attrname => $attrvalues) {
|
|
if (is_int($attrname))
|
|
$value[] = $attrvalues;
|
|
elseif ($attrvalues === true)
|
|
$attr .= ";$attrname"; // true means just tag, not tag=value, as in PHOTO;BASE64:...
|
|
else {
|
|
foreach((array)$attrvalues as $attrvalue)
|
|
$attr .= ";$attrname=" . self::vcard_quote($attrvalue, ',');
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
$value = $entry;
|
|
}
|
|
|
|
$vcard .= self::vcard_quote($type) . $attr . ':' . self::vcard_quote($value) . "\n";
|
|
}
|
|
}
|
|
|
|
return "BEGIN:VCARD\nVERSION:3.0\n{$vcard}END:VCARD";
|
|
}
|
|
|
|
|
|
/**
|
|
* Join indexed data array to a vcard quoted string
|
|
*
|
|
* @param array Field data
|
|
* @param string Separator
|
|
* @return string Joined and quoted string
|
|
*/
|
|
private static function vcard_quote($s, $sep = ';')
|
|
{
|
|
if (is_array($s)) {
|
|
foreach($s as $part) {
|
|
$r[] = self::vcard_quote($part, $sep);
|
|
}
|
|
return(implode($sep, (array)$r));
|
|
}
|
|
else {
|
|
return strtr($s, array('\\' => '\\\\', "\r" => '', "\n" => '\n', ';' => '\;', ':' => '\:'));
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns UNICODE type based on BOM (Byte Order Mark)
|
|
*
|
|
* @param string Input string to test
|
|
* @return string Detected encoding
|
|
*/
|
|
private static function detect_encoding($string)
|
|
{
|
|
if (substr($string, 0, 4) == "\0\0\xFE\xFF") return 'UTF-32BE'; // Big Endian
|
|
if (substr($string, 0, 4) == "\xFF\xFE\0\0") return 'UTF-32LE'; // Little Endian
|
|
if (substr($string, 0, 2) == "\xFE\xFF") return 'UTF-16BE'; // Big Endian
|
|
if (substr($string, 0, 2) == "\xFF\xFE") return 'UTF-16LE'; // Little Endian
|
|
if (substr($string, 0, 3) == "\xEF\xBB\xBF") return 'UTF-8';
|
|
|
|
// use mb_detect_encoding()
|
|
$encodings = array('UTF-8', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3',
|
|
'ISO-8859-4', 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9',
|
|
'ISO-8859-10', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16',
|
|
'WINDOWS-1252', 'WINDOWS-1251', 'BIG5', 'GB2312');
|
|
|
|
if (function_exists('mb_detect_encoding') && ($enc = mb_detect_encoding($string, $encodings)))
|
|
return $enc;
|
|
|
|
// No match, check for UTF-8
|
|
// from http://w3.org/International/questions/qa-forms-utf-8.html
|
|
if (preg_match('/\A(
|
|
[\x09\x0A\x0D\x20-\x7E]
|
|
| [\xC2-\xDF][\x80-\xBF]
|
|
| \xE0[\xA0-\xBF][\x80-\xBF]
|
|
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}
|
|
| \xED[\x80-\x9F][\x80-\xBF]
|
|
| \xF0[\x90-\xBF][\x80-\xBF]{2}
|
|
| [\xF1-\xF3][\x80-\xBF]{3}
|
|
| \xF4[\x80-\x8F][\x80-\xBF]{2}
|
|
)*\z/xs', substr($string, 0, 2048)))
|
|
return 'UTF-8';
|
|
|
|
return rcmail::get_instance()->config->get('default_charset', 'ISO-8859-1'); # fallback to Latin-1
|
|
}
|
|
|
|
}
|
|
|
|
|