inc/mail.php

   1 <?php
   2 /**
   3  * Mail functions
   4  *
   5  * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
   6  * @author     Andreas Gohr <andi@splitbrain.org>
   7  */
   8
   9 // end of line for mail lines - RFC822 says CRLF but postfix (and other MTAs?)
  10 // think different
  11 if(!defined('MAILHEADER_EOL')) define('MAILHEADER_EOL',"\n");
  12 #define('MAILHEADER_ASCIIONLY',1);
  13
  14 /**
  15  * Patterns for use in email detection and validation
  16  *
  17  * NOTE: there is an unquoted '/' in RFC2822_ATEXT, it must remain unquoted to be used in the parser
  18  * the pattern uses non-capturing groups as captured groups aren't allowed in the parser
  19  * select pattern delimiters with care!
  20  *
  21  * May not be completly RFC conform!
  22  * @link http://www.faqs.org/rfcs/rfc2822.html (paras 3.4.1 & 3.2.4)
  23  *
  24  * @author Chris Smith <chris@jalakai.co.uk>
  25  * Check if a given mail address is valid
  26  */
  27 if (!defined('RFC2822_ATEXT')) define('RFC2822_ATEXT',"0-9a-zA-Z!#$%&'*+/=?^_`{|}~-");
  28 if (!defined('PREG_PATTERN_VALID_EMAIL')) define(
  29     'PREG_PATTERN_VALID_EMAIL',
  30     '['.RFC2822_ATEXT.']+(?:\.['.RFC2822_ATEXT.']+)*@(?i:[0-9a-z][0-9a-z-]*\.)+(?i:[a-z]{2,63})'
  31 );
  32
  33 /**
  34  * Prepare mailfrom replacement patterns
  35  *
  36  * Also prepares a mailfromnobody config that contains an autoconstructed address
  37  * if the mailfrom one is userdependent and this might not be wanted (subscriptions)
  38  *
  39  * @author Andreas Gohr <andi@splitbrain.org>
  40  */
  41 function mail_setup(){
  42     global $conf;
  43     global $USERINFO;
  44     /** @var Input $INPUT */
  45     global $INPUT;
  46
  47     // auto constructed address
  48     $host = @parse_url(DOKU_URL,PHP_URL_HOST);
  49     if(!$host) $host = 'example.com';
  50     $noreply = 'noreply@'.$host;
  51
  52     $replace = array();
  53     if(!empty($USERINFO['mail'])){
  54         $replace['@MAIL@'] = $USERINFO['mail'];
  55     }else{
  56         $replace['@MAIL@'] = $noreply;
  57     }
  58
  59     // use 'noreply' if no user
  60     $replace['@USER@'] = $INPUT->server->str('REMOTE_USER', 'noreply', true);
  61
  62     if(!empty($USERINFO['name'])){
  63         $replace['@NAME@'] = $USERINFO['name'];
  64     }else{
  65         $replace['@NAME@'] = '';
  66     }
  67
  68     // apply replacements
  69     $from = str_replace(array_keys($replace),
  70                         array_values($replace),
  71                         $conf['mailfrom']);
  72
  73     // any replacements done? set different mailfromnone
  74     if($from != $conf['mailfrom']){
  75         $conf['mailfromnobody'] = $noreply;
  76     }else{
  77         $conf['mailfromnobody'] = $from;
  78     }
  79     $conf['mailfrom'] = $from;
  80 }
  81
  82 /**
  83  * Check if a given mail address is valid
  84  *
  85  * @param   string $email the address to check
  86  * @return  bool          true if address is valid
  87  */
  88 function mail_isvalid($email) {
  89     return EmailAddressValidator::checkEmailAddress($email, true);
  90 }
  91
  92 /**
  93  * Quoted printable encoding
  94  *
  95  * @author umu <umuAThrz.tu-chemnitz.de>
  96  * @link   http://php.net/manual/en/function.imap-8bit.php#61216
  97  *
  98  * @param string $sText
  99  * @param int $maxlen
 100  * @param bool $bEmulate_imap_8bit
 101  *
 102  * @return string
 103  */
 104 function mail_quotedprintable_encode($sText,$maxlen=74,$bEmulate_imap_8bit=true) {
 105     // split text into lines
 106     $aLines= preg_split("/(?:\r\n|\r|\n)/", $sText);
 107     $cnt = count($aLines);
 108
 109     for ($i=0;$i<$cnt;$i++) {
 110         $sLine =& $aLines[$i];
 111         if (strlen($sLine)===0) continue; // do nothing, if empty
 112
 113         $sRegExp = '/[^\x09\x20\x21-\x3C\x3E-\x7E]/e';
 114
 115         // imap_8bit encodes x09 everywhere, not only at lineends,
 116         // for EBCDIC safeness encode !"#$@[\]^`{|}~,
 117         // for complete safeness encode every character :)
 118         if ($bEmulate_imap_8bit)
 119             $sRegExp = '/[^\x20\x21-\x3C\x3E-\x7E]/';
 120
 121         $sLine = preg_replace_callback( $sRegExp, 'mail_quotedprintable_encode_callback', $sLine );
 122
 123         // encode x09,x20 at lineends
 124         {
 125             $iLength = strlen($sLine);
 126             $iLastChar = ord($sLine[$iLength-1]);
 127
 128             //              !!!!!!!!
 129             // imap_8_bit does not encode x20 at the very end of a text,
 130             // here is, where I don't agree with imap_8_bit,
 131             // please correct me, if I'm wrong,
 132             // or comment next line for RFC2045 conformance, if you like
 133             if (!($bEmulate_imap_8bit && ($i==count($aLines)-1))){
 134                 if (($iLastChar==0x09)||($iLastChar==0x20)) {
 135                     $sLine[$iLength-1]='=';
 136                     $sLine .= ($iLastChar==0x09)?'09':'20';
 137                 }
 138             }
 139         }    // imap_8bit encodes x20 before chr(13), too
 140         // although IMHO not requested by RFC2045, why not do it safer :)
 141         // and why not encode any x20 around chr(10) or chr(13)
 142         if ($bEmulate_imap_8bit) {
 143             $sLine=str_replace(' =0D','=20=0D',$sLine);
 144             //$sLine=str_replace(' =0A','=20=0A',$sLine);
 145             //$sLine=str_replace('=0D ','=0D=20',$sLine);
 146             //$sLine=str_replace('=0A ','=0A=20',$sLine);
 147         }
 148
 149         // finally split into softlines no longer than $maxlen chars,
 150         // for even more safeness one could encode x09,x20
 151         // at the very first character of the line
 152         // and after soft linebreaks, as well,
 153         // but this wouldn't be caught by such an easy RegExp
 154         if($maxlen){
 155             preg_match_all( '/.{1,'.($maxlen - 2).'}([^=]{0,2})?/', $sLine, $aMatch );
 156             $sLine = implode( '=' . MAILHEADER_EOL, $aMatch[0] ); // add soft crlf's
 157         }
 158     }
 159
 160     // join lines into text
 161     return implode(MAILHEADER_EOL,$aLines);
 162 }
 163
 164 function mail_quotedprintable_encode_callback($matches){
 165     return sprintf( "=%02X", ord ( $matches[0] ) ) ;
 166 }