define('SMTP_STATUS_NOT_CONNECTED',?1,?TRUE);?
define('SMTP_STATUS_CONNECTED',?2,?TRUE);?

class smtp
{?

var $connection;?
var $recipients;?
var $headers;?
var $超時(shí)；?
var $errors;?
var $status;?
var $body;?
var $from;?
var $host;?
var $port;?
var $helo;?
var $auth;?
var $user;?
var $pass;?
var $debug;?

/**?
*?參數(shù)為一個(gè)數(shù)組?
*?host?SMTP?服務(wù)器的主機(jī)?默認(rèn)：localhost?
*?port?SMTP?服務(wù)器的端口?默認(rèn)：25?
*?helo?發(fā)送HELO命令的名稱?默認(rèn)：localhost?
*?user?SMTP?服務(wù)器的用戶名?默認(rèn)：空值?
*?pass?SMTP?服務(wù)器的登陸密碼?默認(rèn)：空值?
*?timeout?連接超時(shí)的時(shí)間?默認(rèn)：5?
*?@return?bool?
*/?

函數(shù) smtp($params =?array())?
{?

if(!define('CRLF'))定義（'CRLF'，“ n”，真）；?

$this->超時(shí) = 5;?
$this->status = SMTP_STATUS_NOT_CONNECTED;?
$this->host = ‘localhost’;?
$this->端口 = 25;?
$this->auth = FALSE;?
$this->用戶=”;?
$this->pass?=?”;?
$this->errors = array();?
$this->debug = false;?
foreach($params as $key => $value)
{?
$this->$key = $value;?
}?

$this->helo =?$this->host;?

//如果沒有設(shè)置用戶名則不驗(yàn)證
$this->auth?=?(”?==?$this->user)???假：真；?
}?

函數(shù) connect($params?=?array())?
{?

if(!isset($this->status))?
{?
$obj = 新 smtp($params);?

if($obj->connect())?
{?
$obj->status =?SMTP_STATUS_CONNECTED;?
}?

返回 $obj;?

}?
else?
{?

$this->connection?= fsockopen($this->host,?$this->port,?$errno,?$errstr, $this->超時(shí));?
socket_set_timeout($this->連接, 0, 250000);?

$greeting =?$this->get_data();?

if(is_resource($this->連接))?
{?
$this->status = 2;?
返回$this->auth？?$this->ehlo()：$this->helo();?
}?
else?
{?
$this->errors[]?=?'無法連接到服務(wù)器：'.$errstr;?
返回假；?
}?
}?
}?

/**?
*?參數(shù)為數(shù)組?
*?recipients?接收人的數(shù)組?
*?from?發(fā)件人的地址，也將作為回復(fù)地址?
*?headers?頭部信息的數(shù)組?
*?body?郵件的主體?
*/?

函數(shù) send($params?=?array())?
{?

foreach($params as $key => $value)
{?
$this->set($key, $value);?
}?

if($this->is_connected())?
{?
//?服務(wù)器是否需要驗(yàn)證
if($this->auth)?
{
if(!$this->auth()) 返回 FALSE；?
}?

$this->mail($this->from);?

if(is_array($this->recipients))?
{?
foreach($this->recipients?as $value)?
{?
$this->rcpt （價(jià)值）；?
}?
}?
else?
{?
$this->rcpt($this->recipients);?
}?

if(!$this->data()) 返回 FALSE；?

$headers = str_replace(CRLF.'.',?CRLF.'..',?trim(implode(CRLF,?$this->headers)));?
$body?=?str_replace(CRLF.'.',?CRLF.'..',?$this->body);?
$body?=?$body[0]?==?‘?！?？?'.'.$body?:?$body;?

$this->send_data($headers);?
$this->send_data(”);?
$this->send_data($body);?
$this->send_data('.');?

return (substr(trim($this->get_data()), 0, 3) === ‘250′);?
}?
else?
{?
$this->errors[]?=?'未連接！';?
返回假；?
}?
}?

function?helo()?
{?
if(is_resource($this->connection)?
AND?$this->send_data('HELO?' .$this->helo)?
AND substr(trim($error?=?$this->get_data()),?0,?3)?==='250′?)?
{?
return?TRUE;?

}?
else?
{?
$this->errors[]?=?'HELO 命令失敗，輸出：''。?修剪（substr（修剪（$錯(cuò)誤），3））；?
返回假；?
}?
}?

函數(shù) ehlo()?
{?
if(is_resource($this->connection)?
AND?$this->send_data('EHLO?' .$this->helo)?
AND substr(trim($error?=?$this->get_data()),?0,?3)?==='250′?)?
{?
return?TRUE;?
}?
else?
{?
$this->errors[]?= ‘EHLO?命令失敗，輸出：‘’。?修剪（substr（修剪（$錯(cuò)誤），3））；?
返回假；?
}?
}?

function?auth()?
{?
if(is_resource($this->connection)?
AND?$this->send_data('AUTH?LOGIN ')?
AND?substr(trim($error?=?$this->get_data()),?0,?3)?===?'334′?
AND?$this->send_data(base64_encode($this->gt;) ;user))?//?發(fā)送用戶名?
AND?substr(trim($error?=?$this->get_data()),0,3)?===?'334′?
AND?$this->send_data( base64_encode($this->pass))?//?發(fā)送密碼?
AND?substr(trim($error?=?$this->get_data()),0,3)?===?'235′?)?
{
返回 TRUE；?
}?
else?
{?
$this->errors[]?=?'AUTH?命令失?。?'?。?修剪（substr（修剪（$錯(cuò)誤），3））；?
返回假；?
}?
}?

函數(shù)郵件($from)?
{?

if($this->is_connected()?
AND?$this->send_data ('MAIL?FROM:')?
AND?substr(trim($this->get_data()),?0,?2)???===?'250′?)?
{
返回 TRUE；?
}?
否則
{?
返回 FALSE；?
}?
}?

函數(shù) rcpt($to)?
{?
if($this->is_connected()?
AND $this->send_data('RCPT) TO:')?
AND?substr(trim($error?=?$this->get_data()),?0,?2)???===?'25′?)?
{
返回 TRUE；?
}?
else?
{?
$this->errors[]?=?trim(substr(trim($error),?3));?
返回假；?
}?
}?

函數(shù) data()?
{?

if($this->is_connected()?
AND $this->send_data(' DATA')?
AND substr(trim($error?=?$this->get_data()),?0,?3)?===?'354′?)?
{?
return?TRUE;?
}?
else?
{?
$this->errors[]?=?trim(substr(trim($error),?3));?
返回假；?
}?
}?

函數(shù) is_connected()?
{?
return?(is_resource($this->connection)?AND?($this->status?===?SMTP_STATUS_CONNECTED)) ;?
}?

函數(shù) send_data($data)?
{?
if(is_resource($this->connection))?
{?
if($this->debug )?
echo nl2br($data.CRLF);?
return fwrite($this->connection, $data.CRLF, strlen($data) 2);?
}?
否則
{?
返回 FALSE；?
}?
}?

函數(shù)&get_data()
{?

$return =?”;?
$line?=?”;?

if(is_resource($this->connection))?
{?
while(strpos($return,?CRLF)?===?FALSE?OR?substr($line,3,1)?!= =?'?')?
{?
$line?= fgets($this->connection, 512);?
$return?.=?$line;?
}?
if($this->debug===true)?
echo nl2br($return.CRLF);?
返回$return;?

}?
否則
{?
返回 FALSE；?
}?
}?

函數(shù)集($var,?$value)?
{?
$this->$var?= $value;?
返回 TRUE；?
}?
}?//?課程結(jié)束
？>;?