smtp.php

使用php编写的一个收发邮件的小程序

<?php



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("(^|(\r\n))(\.)", "\1.\3", $body);

$header .= "mime-version:1.0\r\n";

if($mailtype=="html"){

$header .= "content-type:text/html\r\n";

}

$header .= "to: ".$to."\r\n";

if ($cc != "") {

$header .= "cc: ".$cc."\r\n";

}

$header .= "from: $from<".$from.">\r\n";

$header .= "subject: ".$subject."\r\n";

$header .= $additional_headers;

$header .= "date: ".date("r")."\r\n";

$header .= "x-mailer:by redhat (php/".phpversion().")\r\n";

list($msec, $sec) = explode(" ", microtime());

$header .= "message-id: <".date("ymdhis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";

$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)) {

$this->log_write("e-mail has been sent to <".$rcpt_to.">\n");

} else {

$this->log_write("error: cannot send email to <".$rcpt_to.">\n");

$sent = false;

}

fclose($this->sock);

$this->log_write("disconnected from remote host\n");

}

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 <cr><lf>.<cr><lf> [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, $header."\r\n".$body);
$this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));



return true;

}



function smtp_eom()

{

fputs($this->sock, "\r\n.\r\n");

$this->smtp_debug(". [eom]\n");



return $this->smtp_ok();

}



function smtp_ok()

{

$response = str_replace("\r\n", "", fgets($this->sock, 512));

$this->smtp_debug($response."\n");



if (!ereg("^[23]", $response)) {

fputs($this->sock, "quit\r\n");

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."\r\n");
$this->smtp_debug("> ".$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)

{

$comment = "\([^()]*\)";

while (ereg($comment, $address)) {

$address = ereg_replace($comment, "", $address);

}



return $address;

}



function get_address($address)

{
$address = ereg_replace("([ \t\r\n])+", "", $address);

$address = ereg_replace("^.*<(.+)>.*$", "\1", $address);



return $address;

}



function smtp_debug($message)

{

if ($this->debug) {

echo $message;

}

}

}

?>