PHPMailer\PHPMailer
PHPMailer::encodeHeader()
Encode a header value (not including its label) optimally. Picks shortest of Q, B, or none. Result includes folding if needed. See RFC822 definitions for phrase, comment and text positions.
Метод класса: PHPMailer{}
Хуков нет.
Возвращает
Строку
.
Использование
$PHPMailer = new PHPMailer(); $PHPMailer->encodeHeader( $str, $position );
- $str(строка) (обязательный)
- The header value to encode
- $position(строка)
- What context the string will be used in
По умолчанию: 'text'
Код PHPMailer::encodeHeader() PHPMailer::encodeHeader WP 6.5.2
public function encodeHeader($str, $position = 'text') { $matchcount = 0; switch (strtolower($position)) { case 'phrase': if (!preg_match('/[\200-\377]/', $str)) { //Can't use addslashes as we don't know the value of magic_quotes_sybase $encoded = addcslashes($str, "\0..\37\177\\\""); if (($str === $encoded) && !preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str)) { return $encoded; } return "\"$encoded\""; } $matchcount = preg_match_all('/[^\040\041\043-\133\135-\176]/', $str, $matches); break; /* @noinspection PhpMissingBreakStatementInspection */ case 'comment': $matchcount = preg_match_all('/[()"]/', $str, $matches); //fallthrough case 'text': default: $matchcount += preg_match_all('/[\000-\010\013\014\016-\037\177-\377]/', $str, $matches); break; } if ($this->has8bitChars($str)) { $charset = $this->CharSet; } else { $charset = static::CHARSET_ASCII; } //Q/B encoding adds 8 chars and the charset ("` =?<charset>?[QB]?<content>?=`"). $overhead = 8 + strlen($charset); if ('mail' === $this->Mailer) { $maxlen = static::MAIL_MAX_LINE_LENGTH - $overhead; } else { $maxlen = static::MAX_LINE_LENGTH - $overhead; } //Select the encoding that produces the shortest output and/or prevents corruption. if ($matchcount > strlen($str) / 3) { //More than 1/3 of the content needs encoding, use B-encode. $encoding = 'B'; } elseif ($matchcount > 0) { //Less than 1/3 of the content needs encoding, use Q-encode. $encoding = 'Q'; } elseif (strlen($str) > $maxlen) { //No encoding needed, but value exceeds max line length, use Q-encode to prevent corruption. $encoding = 'Q'; } else { //No reformatting needed $encoding = false; } switch ($encoding) { case 'B': if ($this->hasMultiBytes($str)) { //Use a custom function which correctly encodes and wraps long //multibyte strings without breaking lines within a character $encoded = $this->base64EncodeWrapMB($str, "\n"); } else { $encoded = base64_encode($str); $maxlen -= $maxlen % 4; $encoded = trim(chunk_split($encoded, $maxlen, "\n")); } $encoded = preg_replace('/^(.*)$/m', ' =?' . $charset . "?$encoding?\\1?=", $encoded); break; case 'Q': $encoded = $this->encodeQ($str, $position); $encoded = $this->wrapText($encoded, $maxlen, true); $encoded = str_replace('=' . static::$LE, "\n", trim($encoded)); $encoded = preg_replace('/^(.*)$/m', ' =?' . $charset . "?$encoding?\\1?=", $encoded); break; default: return $str; } return trim(static::normalizeBreaks($encoded)); }