发一个可以同时兼容新浪云和百度云的邮件发送类

目前只能发送文字信息，大家可以进行改进，欢迎将改进代码分享出来
感谢redspear 帮助改进，将新的代码放出了 class Email{
public $config = array(
'host' => null,
'port' => 25,
'user' => null,
'pass' => null,
'from' => null,
'debug' => false,
'isHtml' => false,
'param' => array('socket_create', 'fsockopen'),
'method' => null,
);

public function __set($key, $value){
$this->config[$key] = $value;
}

public function __get($key){
return $this->config[$key];
}

public function __construct($config = array()){
if(is_array($config)) $this->config = array_merge($this->config, $config);

if(is_null($this->host)) $this->host = C('EMAIL_SMTP');
if(is_null($this->port)) $this->port = C('EMAIL_PORT');
if(is_null($this->user)) $this->user = C('EMAIL_USER');
if(is_null($this->pass)) $this->pass = C('EMAIL_PWD');
if(is_null($this->from)) $this->from = C('EMAIL_FROM');

foreach($this->param as $index=>$method){
if(function_exists($method)){
$this->method = $index;
$this->record("检测函数 {$method} 通过");
break;
}
}

$this->host = gethostbyname($this->host);
$this->user = base64_encode($this->user);
$this->pass = base64_encode($this->pass);

if(is_null($this->method)) $this->record('当前环境不支持发送邮件', true);
}

//发送方法
public function send($to='', $subject='', $body=''){
if(is_null($this->method)){
$this->result = false;
return false;
}

if(!$to || !$subject || !$body){
$this->record('收信人信息不全', true);
$this->result = false;
return false;
}

$this->to = $to; //收信人
$this->subject = $subject; //邮件主题
$this->body = $body; //邮件内容

$method = $this->param[$this->method];
if(!method_exists($this, $method)){
$this->record("调用方法 {$method} 不存在", true);
$this->result = false;
return false;
}

$this->$method();
}

private function socket_create(){
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if($this->socket){
$this->record('创建SOCKET:' . socket_strerror(socket_last_error()));
}else{
$this->record('初始化失败，请检查您的网络连接和参数', true);
$this->result = false;
return false;
}
$conn = socket_connect($this->socket, $this->host, $this->port);
if($conn){
$this->record('创建SOCKET连接:' . socket_strerror(socket_last_error()));
}else{
$this->record('初始化失败，请检查您的网络连接和参数', true);
$this->result = false;
return false;
}
$this->record("服务器应答：".socket_read($this->socket, 1024)."");

$this->handle();
}

private function socket_create_call($params){
socket_write($this->socket, $params[0], strlen($params[0]));
$this->record("客户机命令：{$params[0]}");
$msg = socket_read($this->socket, 1024);
$this->record("服务器应答：{$msg}");

if(isset($params[1]) && strpos($msg, $params[1]) === false){
$this->record($params[2], true);
$this->result = false;
}
}

// fsockopen函数发送
private function fsockopen(){
$this->socket = fsockopen($this->host, $this->port, $errno, $errstr, 60);
if($this->socket){
$this->record("创建SOCKET连接:".$this->host.':'.$this->port);
}else{
$this->record('初始化失败，请检查您的网络连接和参数'.$errstr, true);
$this->result = false;
return false;
}
stream_set_blocking($this->socket, true);
$this->handle();
}

private function fsockopen_call($params){
fputs($this->socket, $params[0]);
$this->record("客户机命令：{$params[0]}");
$msg = fgets($this->socket, 512);
$this->record("服务器应答：{$msg}");

if(isset($params[1]) && strpos($msg, $params[1]) === false){
$this->record($params[2], true);
$this->result = false;
}
}

private function handle(){
$all = array();
array_push($all, "From:{$this->from}\r\n");
array_push($all, "To:{$this->to}\r\n");
array_push($all, "Subject:=?utf-8?B?" . base64_encode($this->subject) . "?=\r\n");
$this->isHtml ? array_push($all, "Content-Type: text/html;\r\n") : array_push($all, "Content-Type: text/plain;\r\n"); //邮件类型 html或文本
array_push($all, "charset: utf-8\r\n");
//告诉浏览器信件内容进过了base64编码，最后必须要发一组\r\n产生一个空行,表示头部信息发送完毕
array_push($all, "Content-Transfer-Encoding: base64\r\n\r\n");
array_push($all, base64_encode($this->body));

$all = implode('', $all);

$method = $this->param[$this->method];
$call = $method . '_call';

if(!method_exists($this, $call)){
$this->record("调用方法 {$call} 不存在", true);
$this->result = false;
return false;
}

$items = array(
array("EHLO wangdong\r\n"),
array("AUTH LOGIN\r\n"),
array("{$this->user}\r\n"),
array("{$this->pass}\r\n", '235', 'smtp 认证失败'),
array("MAIL FROM:from}>\r\n", '250', '邮件发送失败'),
array("RCPT TO:to}>\r\n", '250', '邮件发送失败'),
array("DATA\r\n", '354', '邮件发送失败'),
array("{$all}\r\n.\r\n", '250', '邮件发送失败'),
array("QUIT\r\n"),
);

//以下是和服务器会话
foreach($items as $index=>$params){
$this->$call($params);
if($this->result === false) return false;

if($index == 0){
// fsockopen需要单独处理
while ($method == 'fsockopen') {
$msg = fgets($this->socket, 512);
$this->record("服务器应答：{$msg}");
if ((substr($msg, 3, 1) != '-') || empty($msg)) break;
}
}
}

if($this->result !== false) $this->result = true;
}

//调试记录
private function record($msg, $save = false){
if($save) $this->error = $msg;
if($this->debug) printf("

%s

\n", $msg);
}

//关闭socket
public function __destruct(){
$method = $this->param[$this->method];
switch ($method){
case 'socket_create':
socket_close($this->socket);
break;
case 'fsockopen':
fclose($this->socket);
break;
}
}
}

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