SMTP email sending class written in PHP-PHP Tutorial-php.cn

$smtpserver = "*****";
$smtpserverport = 25;
$smtpuser = "******";
$smtppass = "***** **";
$smtp = new smtp($smtpserver, $smtpserverport, true, $smtpuser, $smtppass); //A true here means that authentication is used, otherwise authentication is not used.
$smtp-> ;debug = false;
//$emailtype = "HTML";
for ($i=0; $i<5; $i++) {
$smtp->sendmail("*****", "* *****", "Hello world!","This is only a test!");
}
echo "A total of $i emails were sent! ";
?>

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The following is the implementation of the specific class.

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 $this->smtp_error("sending ;;.;; [EOM]");
}
if (!$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 . ";";
}
}
}
?>

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