PHP online mail send class, sent via SMTP

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/*
* Mail Send Class
* Author: More than a rookie
* Contact Email: KINGERQ at MSN DOT com
* Date Created: 2005-08-19
* Note: This category for the modified, forget the source of
*/
Class Smail {
Your SMTP server vendor, which can be a domain name or IP address
var $smtp = "smtp.163.com";
SMTP requires authentication setting of 1 does not require an authentication value of 0, now most of the SMTP service provider to verify, if not clear please contact your SMTP service provider.
var $check = 1;
Name of your email account
var $username = "";
Your email password
var $password = "";
This email must be an email on the sending server
var $s _from = "";

/*
* Function: Letter initialization settings
* $from the mailbox on your sending server
* $password Your email password
* $SMTP your SMTP server vendor, which can be a domain name or IP address
* $check SMTP requires authentication setting of 1 does not require an authentication value of 0, now most SMTP service providers have to verify
*/
function Smail ($from, $password, $smtp, $check = 1) {
if (Preg_match ("/^[^\d\-_][\w\-]*[^\-_]@[^\-][a-za-z\d\-]+[^\-") (\.[ ^\-][a-za-z\d\-]*[^\-]) *\. [A-za-z] {2,3}/", $from)) {
$this->username = substr ($from, 0, Strpos ($from, "@"));
$this->password = $password;
$this->smtp = $smtp? $SMTP: $this->smtp;
$this->check = $check;
$this->s_from = $from;
}
}

/*
* Function: Send mail
* $to Target Mailbox
* $from Source Mailbox
* $subject Message headers
* $message Mail Content
*/
function Send ($to, $from, $subject, $message) {

Connecting to a server
$fp = Fsockopen ($this->smtp, $errno, $ERRSTR, 60);
if (! $fp) return "Join Server failed". __line__;
Set_socket_blocking ($fp, true);

$lastmessage =fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!=) return "error message:". $lastmessage. __line__;

HELO
$yourname = "Yourname";
if ($this->check = = "1") $lastact = "EHLO". $yourname. " \ r \ n ";
else $lastact = "HELO". $yourname. " \ r \ n ";

Fputs ($fp, $lastact);
$lastmessage = = fgets ($fp, 512);
if (substr ($lastmessage, 0,3)!=) return "error message $lastmessage". __line__;
while (true) {
$lastmessage = fgets ($FP, 512);
if ((substr ($lastmessage, 3,1)!= "-") or (Empty ($lastmessage)))
Break
}


Authentication
if ($this->check== "1") {
Verify Start
$lastact = "AUTH LOGIN". \ r \ n ";
Fputs ($fp, $lastact);
$lastmessage = fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!= 334) return "error message $lastmessage". __line__;
User name
$lastact =base64_encode ($this->username). " \ r \ n ";
Fputs ($fp, $lastact);
$lastmessage = fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!= 334) return "error message $lastmessage". __line__;
User password
$lastact =base64_encode ($this->password). " \ r \ n ";
Fputs ($fp, $lastact);
$lastmessage = fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!= "235") return "error message $lastmessage". __line__;
}

From:
$lastact = "MAIL from:". $this->s_from. "\ r \ n";
Fputs ($fp, $lastact);
$lastmessage = fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!=) return "error message $lastmessage". __line__;

To:
$lastact = "RCPT to: $to". "\ r \ n";
Fputs ($fp, $lastact);
$lastmessage = fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!=) return "error message $lastmessage". __line__;

DATA
$lastact = "data\r\n";
Fputs ($fp, $lastact);
$lastmessage = fgets ($FP, 512);
if (substr ($lastmessage, 0,3)!= 354) return "error message $lastmessage". __line__;


Handle Subject Head
$head = "Subject: $subject \ r \ n";
$message = $head. " \ r \ n ". $message;


Process from header
$head = "From: $from \ r \ n";
$message = $head. $message;

Handling to headers
$head = "to: $to \ r \ n";
$message = $head. $message;


Plus End string
$message. = "\r\n.\r\n";

Send a message
Fputs ($fp, $message);
$lastact = "quit\r\n";

Fputs ($fp, $lastace);
Fclose ($FP);
return 0;
}
}
/* Send sample
$SM = new Smail ("Username @163.com", "Password", "smtp.163.com");
$end = $sm->send ("Destination mailbox", "Source Mailbox", "This is the title", "This is the Mail content");
if ($end) echo $end;
else echo "Send success!" ";
*/
?>