ezcMailImapTransport::getNextTag PHP 메소드

    protected function getNextTag()
    {
        $tagLetter = substr($this->currentTag, 0, 1);
        $tagNumber = intval(substr($this->currentTag, 1));
        $tagNumber++;
        if ($tagLetter == 'Z' && $tagNumber == 10000) {
            $tagLetter = 'A';
            $tagNumber = 1;
        }
        if ($tagNumber == 10000) {
            $tagLetter++;
            $tagNumber = 0;
        }
        $this->currentTag = $tagLetter . sprintf("%04s", $tagNumber);
        return $this->currentTag;
    }

 /**
  * Generates the next IMAP tag to prepend to client commands.
  *
  * The structure of the IMAP tag is Axxxx, where
  *  - A is a letter (uppercase for conformity)
  *  - x is a digit from 0 to 9
  * example of generated tag: T5439
  * It uses the class variable {@link $this->currentTag}.
  * Everytime it is called, the tag increases by 1.
  * If it reaches the last tag, it wraps around to the first tag.
  * By default, the first generated tag is A0001.
  *
  * @return string
  */
 public function getNextTag()
 {
     return parent::getNextTag();
 }