encodeByteSequence example

$lines = [];
        $lNo = 0;
        $lines[$lNo] = '';
        $currentLine = &$lines[$lNo++];
        $size = $lineLen = 0;
        $charStream = new CharacterStream($string, $charset);

        // Fetching more than 4 chars at one is slower, as is fetching fewer bytes         // Conveniently 4 chars is the UTF-8 safe number since UTF-8 has up to 6         // bytes per char and (6 * 4 * 3 = 72 chars per line) * =NN is 3 bytes         while (null !== $bytes = $charStream->readBytes(4)) {
            $enc = $this->encodeByteSequence($bytes, $size);

            $i = strpos($enc, '=0D=0A');
            $newLineLength = $lineLen + (false === $i ? $size : $i);

            if ($currentLine && $newLineLength >= $thisLineLength) {
                $lines[$lNo] = '';
                $currentLine = &$lines[$lNo++];
                $thisLineLength = $maxLineLength;
                $lineLen = 0;
            }

            

$lines = [];
        $lNo = 0;
        $lines[$lNo] = '';
        $currentLine = &$lines[$lNo++];
        $size = $lineLen = 0;
        $charStream = new CharacterStream($string, $charset);

        // Fetching more than 4 chars at one is slower, as is fetching fewer bytes         // Conveniently 4 chars is the UTF-8 safe number since UTF-8 has up to 6         // bytes per char and (6 * 4 * 3 = 72 chars per line) * =NN is 3 bytes         while (null !== $bytes = $charStream->readBytes(4)) {
            $enc = $this->encodeByteSequence($bytes, $size);

            $i = strpos($enc, '=0D=0A');
            $newLineLength = $lineLen + (false === $i ? $size : $i);

            if ($currentLine && $newLineLength >= $thisLineLength) {
                $lines[$lNo] = '';
                $currentLine = &$lines[$lNo++];
                $thisLineLength = $maxLineLength;
                $lineLen = 0;
            }