protected function getTokenSplitPattern()
    {
        $sChars = implode('|', $this->getAllTokenSeparators());
        $mimePartPattern = MimeLiteralPart::MIME_PART_PATTERN;
        return '~(' . $mimePartPattern . '|\\\\.|' . $sChars . ')~';
    }
protected function getTokenSplitPattern()
    {
        $sChars = implode('|', $this->getAllTokenSeparators());
        $mimePartPattern = MimeLiteralPart::MIME_PART_PATTERN;
        return '~(' . $mimePartPattern . '|\\\\.|' . $sChars . ')~';
    }
protected function getTokenSplitPattern ( ) { $ sChars = implode ( '|' , $ this -> getAllTokenSeparators ( ) ) ; $ mimePartPattern = MimeLiteralPart :: MIME_PART_PATTERN ; return '~(' . $ mimePartPattern . '|\\\\.|' . $ sChars . ')~' ; }
Returns a regex pattern used to split the input header string.  The
default implementation calls getAllTokenSeparators and implodes the
returned array with the regex OR '|' character as its glue.

@return string the regex pattern
Returns a regex pattern used to split the input header string . The default implementation calls getAllTokenSeparators and implodes the returned array with the regex OR | character as its glue .