完整邮件发送类

完整邮件发送类
class smtp
{
/* Public Variables */
var $smtp_port;
var $time_out;
var $host_name;
var $log_file;
var $relay_host;
var $debug;
var $auth;
var $user;
var $pass;

/* Private Variables */
var $sock;

/* Constractor */
function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)
{
$this->debug = FALSE;
$this->smtp_port = $smtp_port;
$this->relay_host = $relay_host;
$this->time_out = 30; //is used in fsockopen()
$this->auth = $auth;//auth
$this->user = $user;
$this->pass = $pass;
$this->host_name = "localhost"; //is used in HELO command
$this->log_file = "";
$this->sock = FALSE;
}

/* Main Function */
function sendmail($to, $from ,$fromname, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = ""){
$mail_from = $this->get_address($this->strip_comment($from));
$body = ereg_replace("(^|(rn))(.)", "1.3", $body);
$header .= "MIME-Version:1.0rn";
if($mailtype=="HTML"){
$header .= "Content-Type:text/html;charset=utf-8rn";
}
$header .= "To: ".$to."rn";
if ($cc != ""){
$header .= "Cc: ".$cc."rn";
}
$header .= "From: $fromnamern";
$header .= "Subject: ".$subject."rn";
$header .= $additional_headers;
$header .= "Date: ".date("r")."rn";
$header .= "X-Mailer:By Redhat (PHP/".php教程version().")rn";
list($msec, $sec) = explode(" ", microtime());
$header .= "Message-ID: rn";
$TO = explode(",", $this->strip_comment($to));

if ($cc != ""){
$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
}
if ($bcc != ""){
$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
}
$sent = TRUE;
foreach ($TO as $rcpt_to){
$rcpt_to = $this->get_address($rcpt_to);
if (!$this->smtp_sockopen($rcpt_to)){
$this->log_write("Error: Cannot send email to ".$rcpt_to."n");
$sent = FALSE;
continue;
}
if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)){
$this->log_write("E-mail has been sent to n");
}else{
$this->log_write("Error: Cannot send email to n");
$sent = FALSE;
}
fclose($this->sock);
$this->log_write("Disconnected from remote hostn");
}
return $sent;
}

/* Private Functions */
function smtp_send($helo, $from, $to, $header, $body = ""){
if (!$this->smtp_putcmd("HELO", $helo)){
return $this->smtp_error("sending HELO command");
}

#auth
if($this->auth){
if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))){
return $this->smtp_error("sending HELO command");
}
if (!$this->smtp_putcmd("", base64_encode($this->pass))){
return $this->smtp_error("sending HELO command");
}
}
if (!$this->smtp_putcmd("MAIL", "FROM:")){
return $this->smtp_error("sending MAIL FROM command");
}
if (!$this->smtp_putcmd("RCPT", "TO:")){
return $this->smtp_error("sending RCPT TO command");
}
if (!$this->smtp_putcmd("DATA")){
return $this->smtp_error("sending DATA command");
}
if (!$this->smtp_message($header, $body)){
return $this->smtp_error("sending message");
}
if (!$this->smtp_eom()){
return $this->smtp_error("sending . [EOM]");
}
if (!$this->smtp_putcmd("QUIT")){
return $this->smtp_error("sending QUIT command");
}
return TRUE;
}

function smtp_sockopen($address){
if ($this->relay_host == ""){
return $this->smtp_sockopen_mx($address);
}
else{
return $this->smtp_sockopen_relay();
}
}

function smtp_sockopen_relay(){
$this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."n");
$this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())){
$this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."n");
$this->log_write("Error: ".$errstr." (".$errno.")n");
return FALSE;
}
$this->log_write("Connected to relay host ".$this->relay_host."n");
return TRUE;;
}

function smtp_sockopen_mx($address){
$domain = ereg_replace("^.+@([^@]+)$", "1", $address);
if (!@getmxrr($domain, $MXHOSTS)){
$this->log_write("Error: Cannot resolve MX "".$domain.""n");
return FALSE;
}
foreach ($MXHOSTS as $host){
$this->log_write("Trying to ".$host.":".$this->smtp_port."n");
$this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())){
$this->log_write("Warning: Cannot connect to mx host ".$host."n");
$this->log_write("Error: ".$errstr." (".$errno.")n");
continue;
}
$this->log_write("Connected to mx host ".$host."n");
return TRUE;
}
$this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")n");
return FALSE;
}

function smtp_message($header, $body){
fputs($this->sock, $header."rn".$body);
$this->smtp_debug("> ".str_replace("rn", "n"."> ", $header."n> ".$body."n> "));
return TRUE;
}

function smtp_eom(){
fputs($this->sock, "rn.rn");
$this->smtp_debug(". [EOM]n");
return $this->smtp_ok();
}

function smtp_ok(){
$response = str_replace("rn", "", fgets($this->sock, 512));
$this->smtp_debug($response."n");
if (!ereg("^[23]", $response)){
fputs($this->sock, "QUITrn");
fgets($this->sock, 512);
$this->log_write("Error: Remote host returned "".$response.""n");
return FALSE;
}
return TRUE;
}

function smtp_putcmd($cmd, $arg = ""){
if($arg != ""){
if($cmd==""){
$cmd = $arg;
}
else{
$cmd = $cmd." ".$arg;
}
}
fputs($this->sock, $cmd."rn");
$this->smtp_debug("> ".$cmd."n");
return $this->smtp_ok();
}

function smtp_error($string){
$this->log_write("Error: Error occurred while ".$string.".n");
return FALSE;
}

function log_write($message){
$this->smtp_debug($message);
if ($this->log_file == ""){
return TRUE;
}
$message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))){
$this->smtp_debug("Warning: Cannot open log file "".$this->log_file.""n");
return FALSE;;
}
flock($fp, LOCK_EX);
fputs($fp, $message);
fclose($fp);
return TRUE;
}

function strip_comment($address){//去除"()"
$comment = "([^()]*)";
while (ereg($comment, $address)){
$address = ereg_replace($comment, "", $address);
}
return $address;
}

function get_address($address){
$address = ereg_replace("([trn])+", "", $address);//t 制表符 r 回车符 n 换行符 +匹配前面的子表达式一次或多次
$address = ereg_replace("^.*.*$", "1", $address);
return $address;
}

function smtp_debug($message){
if ($this->debug){
echo $message;
}
}
}