PHP的一个完整SMTP类(解决邮件服务器需要验证时的问题)

smtp.php

<?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("(^|( ))(.)", "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 ");

}

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." ");

$this->sock = @fsockopen($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 (log_file">!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "