php 메일 발송 class

/***************************************/
/* 파일명 : class.smtp.php
/* 제작일 : 2002-08-30
/* 제작자 : 하근호(hopegiver@korea.com)
/***************************************/

class Smtp
{

	var $host;
	var $fp;

	var $lastmsg;
	var $parts;

	var $debug;
	var $charset;
	var $ctype;
	var $BCC;
	var $CC;

	function Smtp($host="localhost")
	{
		$this->host = $host;
		$this->parts = array();

		$$this->debug = 0;
		$this->charset = "euc-kr";
		$this->ctype = "text/html";
	}

	// 디버그 모드 : 1
	function debug($n=1)
	{
		$this->debug = $n;
	}

	// smtp 통신을 한다.
	function dialogue($code, $cmd)
	{
		fputs($this->fp, $cmd."\r\n");
		$line = fgets($this->fp, 1024);
		ereg("^([0-9]+).(.*)$", $line, &$data);
		$this->lastmsg = $data[0];

		if($this->debug)
		{
			echo htmlspecialchars($cmd)."
			".$this->lastmsg."
			";
			flush();
		}

		if($data[1] != $code) return false;
		return true;
	}

	// smptp 서버에 접속을 한다.
	function connect($host='')
	{
		if($this->debug)
		{
			echo "SMTP($host) Connecting...
			";
			flush();
		}

		if(!$host) $host = $this->host;
		if(!$this->fp = fsockopen($host, 25, $errno, $errstr, 10))
		{
			$this->lastmsg = "SMTP($host) 서버접속에 실패했습니다.[$errno:$errstr]";
			return false;
		}

		$line = fgets($this->fp, 1024);
		ereg("^([0-9]+).(.*)$", $line, &$data);
		$this->lastmsg = $data[0];
		if($data[1] != "220") return false;

		if($this->debug)
		{
			echo $this->lastmsg."
			";
			flush();
		}

		$this->dialogue(250, "HELO phpmail");
		return true;

	}

	// stmp 서버와의 접속을 끊는다.
	function close()
	{
		$this->dialogue(221, "QUIT");
		fclose($this->fp);
		return true;
	}

	// 메시지를 보낸다.
	function smtp_send($email, $from, $data)
	{

		if(!$mail_from = $this->get_email($from)) return false;
		if(!$rcpt_to = $this->get_email($email)) return false;

		// ........ 2004 치즈버거
		$id = "아이디";
		$pwd = "비밀번호";
		if(!$this->dialogue(250, "AUTH LOGIN")) return false;
		if(!$this->dialogue(250, base64_encode($id))) return false;
		if(!$this->dialogue(250, base64_encode($pwd))) return false;
		// ........ 2004 치즈버거

		if(!$this->dialogue(250, "MAIL FROM:$mail_from")) return false;
		if(!$this->dialogue(250, "RCPT TO:$rcpt_to"))
		{
			$this->dialogue(250, "RCPT TO:");
			$this->dialogue(354, "DATA");
			$this->dialogue(250, ".");
			return false;
		}
		//$this->dialogue(250, "RCPT TO:");
		$this->dialogue(354, "DATA");

		$mime = "Message-ID: <".$this->get_message_id()."<\r\n";
		$mime .= "From: $from\r\n";
		$mime .= "To: $email\r\n";

		/*
		if($this->CC) $mime .= "Cc: ".$this->CC."\r\n";
		if($this->BCC) $mime .= "Bcc: ".$this->BCC."\r\n";
		*/

		fputs($this->fp, $mime);
		fputs($this->fp, $data);
		$this->dialogue(250, ".");

	}

	// Message ID 를 얻는다.
	function get_message_id()
	{
		$id = date("YmdHis",time());
		mt_srand((float) microtime() * 1000000);
		$randval = mt_rand();
		$id .= $randval."@phpmail";
		return $id;
	}

	// Boundary 값을 얻는다.
	function get_boundary()
	{
		$uniqchr = uniqid(time());
		$one = strtoupper($uniqchr[0]);
		$two = strtoupper(substr($uniqchr,0,8));
		$three = strtoupper(substr(strrev($uniqchr),0,8));
		return "----=_NextPart_000_000${one}_${two}.${three}";
	}

	// 첨부파일이 있을 경우 이 함수를 이용해 파일을 첨부한다.
	function attach($path, $name="", $ctype="application/octet-stream")
	{
		if(is_file($path))
		{
			$fp = fopen($path, "r");
			$message = fread($fp, filesize($path));
			fclose($fp);
			$this->parts[] = array ("ctype" => $ctype, "message" => $message, "name" => $name);
		} else return false;
	}

	// Multipart 메시지를 생성시킨다.
	function build_message($part)
	{
		$msg .= "Content-Type: ".$part['ctype'];
		if($part['name']) $msg .= "; name=\"".$part['name']."\"";
		$msg .= "\r\nContent-Transfer-Encoding: base64\r\n";
		$msg .= "Content-Disposition: attachment; filename=\"".$part['name']."\"\r\n\r\n";
		$msg .= chunk_split(base64_encode($part['message']));
		return $msg;
	}

	// SMTP에 보낼 DATA를 생성시킨다.
	function build_data($subject, $body)
	{
		$boundary = $this->get_boundary();
		$attcnt = count($this->parts);

		$mime .= "Subject: $subject\r\n";
		$mime .= "Date: ".date ("D, j M Y H:i:s T",time())."\r\n";
		$mime .= "MIME-Version: 1.0\r\n";
		if($attcnt > 0)
		{
			$mime .= "Content-Type: multipart/mixed; boundary=\"".$boundary."\"\r\n\r\n".
			"This is a multi-part message in MIME format.\r\n\r\n";
			$mime .= "--".$boundary."\r\n";
		}
		$mime .= "Content-Type: ".$this->ctype."; charset=\"".$this->charset."\"\r\n".
		"Content-Transfer-Encoding: base64\r\n\r\n" . chunk_split(base64_encode($body));

		if($attcnt > 0)
		{
			$mime .= "\r\n\r\n--".$boundary;
			for($i=0; $i<$attcnt; $i++)
			{
				$mime .= "\r\n".$this->build_message($this->parts[$i])."\r\n\r\n--".$boundary;
			}
			$mime .= "--\r\n";
		}
		return $mime;
	}

	// MX 값을 찾는다.
	function get_mx_server($email)
	{
		if(!ereg("([\._0-9a-zA-Z-]+)@([0-9a-zA-Z-]+\.[a-zA-Z\.]+)", $email, $reg)) return false;
		getmxrr($reg[2], $host);
		if(!$host) $host[0] = $reg[2];
		return $host;
	}

	// 이메일의 형식이 맞는지 체크한다.
	function get_email($email)
	{
		if(!ereg("([\._0-9a-zA-Z-]+)@([0-9a-zA-Z-]+\.[a-zA-Z\.]+)", $email, $reg)) return false;
		return "<".$reg[0].">";
	}

	//대용량 발송을 위한 함수.
	function send($to, $from, $subject, $body)
	{
		$data = $this->build_data($subject, $body);
		return $this->smtp_send($to, $from, $data);
	}

	// 메일을 전송한다.
	function sendmail($to, $from, $subject, $body, $type=1)
	{
		if($type == 0) $this->ctype = "text/plain";

		if(!is_array($to)) $to = split("[,;]",$to);
		$data = $this->build_data($subject, $body);

		if($this->host == "auto")
		{
			foreach($to as $email)
			{
				if($host = $this->get_mx_server($email))
				{
					for($i=0, $max=count($host); $i<$max; $i++)
					{
						if($conn = $this->connect($host[$i])) break;
					}
					if($conn)
					{
						$this->smtp_send($email, $from, $data);
						$this->close();
					}
				}
			}
		}
		else
		{
			$this->connect($this->host);
			foreach($to as $email) $this->smtp_send($email, $from, $data);
			$this->close();
		}
	}
}


	/*
	$mail = new Smtp;
	$mail->debug();
	$mail->sendmail("photon0@hanmail.net", "hopegiver@whois.co.kr", "이 메일은 정상입니다.", "정상적인 메일이니 삭제하지 마십시오.");

	OR

	$mail->connect();
	$mail->send();
	$mail->close();
	*/