自动发送邮件的代码(php发送邮件代码)

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, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
{
$mail_from = $this->get_address($this->strip_comment($from));
$body = ereg_replace("(^|( ))(.)", "1.3", $body);
$header .= "mime-version:1.0 ";
if($mailtype=="html"){
$header .= "content-type:text/html ";
}
$header .= "to: ".$to." ";
if ($cc != "") {
$header .= "cc: ".$cc." ";
}
$header .= "from: $from<".$from."> ";
$header .= "subject: ".$subject." ";
$header .= $additional_headers;
$header .= "date: ".date("r")." ";
$header .= "x-mailer:by redhat (php/".phpversion().") ";
list($msec, $sec) = explode(" ", microtime());
$header .= "message-id: <".date("ymdhis", $sec).".".($msec*1000000).".".$mail_from."> ";
$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." ");
$sent = false;
continue;
}
if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
$this->log_write("e-mail has been sent to <".$rcpt_to."> ");
} else {
$this->log_write("error: cannot send email to <".$rcpt_to."> ");
$sent = false;
}
fclose($this->sock);
$this->log_write("disconnected from remote host ");
}
echo "
";
//echo $header;
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:<".$from.">")) {
return $this->smtp_error("sending mail from command");
}

if (!$this->smtp_putcmd("rcpt", "to:<".$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." ");
$this->sock = @fsockopen($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." ");
$this->log_write("error: ".$errstr." (".$errno.") ");
return false;
}
$this->log_write("connected to relay host ".$this->relay_host." ");
return true;;
}

function smtp_sockopen_mx($address)
{
$domain = ereg_replace("^.+@([^@]+)$", "1", $address);
if (!@getmxrr($domain, $mxhosts)) {
$this->log_write("error: cannot resolve mx "".$domain."" ");
return false;
}
foreach ($mxhosts as $host) {
$this->log_write("trying to ".$host.":".$this->smtp_port." ");
$this->sock = @fsockopen($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." ");
$this->log_write("error: ".$errstr." (".$errno.") ");
continue;
}
$this->log_write("connected to mx host ".$host." ");
return true;
}
$this->log_write("error: cannot connect to any mx hosts (".implode(", ", $mxhosts).") ");
return false;
}

function smtp_message($header, $body)
{
fputs($this->sock, $header." ".$body);
$this->smtp_debug("> ".str_replace(" ", " "."> ", $header." > ".$body." > "));

return true;
}

function smtp_eom()
{
fputs($this->sock, " . ");
$this->smtp_debug(". [eom] ");

return $this->smtp_ok();
}

function smtp_ok()
{
$response = str_replace(" ", "", fgets($this->sock, 512));
$this->smtp_debug($response." ");

if (!ereg("^[23]", $response)) {
fputs($this->sock, "quit ");
fgets($this->sock, 512);
$this->log_write("error: remote host returned "".$response."" ");
return false;
}
return true;
}

function smtp_putcmd($cmd, $arg = "")
{
if ($arg != "") {
if($cmd=="") $cmd = $arg;
else $cmd = $cmd." ".$arg;
}

fputs($this->sock, $cmd." ");
$this->smtp_debug("> ".$cmd." ");

return $this->smtp_ok();
}

function smtp_error($string)
{
$this->log_write("error: error occurred while ".$string.". ");
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."" ");
return false;
}
flock($fp, lock_ex);
fputs($fp, $message);
fclose($fp);

return true;
}

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

return $address;
}

function get_address($address)
{
$address = ereg_replace("([ ])+", "", $address);
$address = ereg_replace("^.*<(.+)>.*$", "1", $address);

return $address;
}

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

function get_attach_type($image_tag) { //

$filedata = array();

$img_file_con=fopen($image_tag,"r");
unset($image_data);
while ($tem_buffer=addslashes(fread($img_file_con,filesize($image_tag))))
$image_data.=$tem_buffer;
fclose($img_file_con);

$filedata['context'] = $image_data;
$filedata['filename']= basename($image_tag);
$extension=substr($image_tag,strrpos($image_tag,"."),strlen($image_tag)-strrpos($image_tag,"."));
switch($extension){
case ".gif":
$filedata['type'] = "image/gif";
break;
case ".gz":
$filedata['type'] = "application/x-gzip";
break;
case ".htm":
$filedata['type'] = "text/html";
break;
case ".html":
$filedata['type'] = "text/html";
break;
case ".jpg":
$filedata['type'] = "image/jpeg";
break;
case ".tar":
$filedata['type'] = "application/x-tar";
break;
case ".txt":
$filedata['type'] = "text/plain";
break;
case ".zip":
$filedata['type'] = "application/zip";
break;
default:
$filedata['type'] = "application/octet-stream";
break;
}

return $filedata;
}

}