PHP支持发送HTML格式邮件的发送类

        /**
    * 邮件发送类
    * 支持发送纯文本邮件和HTML格式的邮件
    * @example
    * $config = array(
    *       "from" => "*****",
    *       "to" => "***",
    *       "subject" => "test",
    *       "body" => "test",
    *       "username" => "***",
    *       "password" => "****",
    *       "isHTML" => true
    *   );
    *
    * $mail = new MySendMail();
    *
    * $mail->setServer("smtp.126.com");
    *
    * $mail->setMailInfo($config);
    * if(!$mail->sendMail()) {
    *   echo $mail->error();
    *   return 1;
    * }
    */
    class MySendMail{
        /**
        * @var 邮件传输代理用户名
        * @access private
        */
        private $_userName;

        /**
        * @var 邮件传输代理密码
        * @access private
        */
        private $_password;

        /**
        * @var 邮件传输代理服务器地址
        * @access protected
        */
        protected $_sendServer;

        /**
        * @var 邮件传输代理服务器端口
        * @access protected
        */
        protected $_port=25;

        /**
        * @var 发件人
        * @access protected
        */
        protected $_from;

        /**
        * @var 收件人
        * @access protected
        */
        protected $_to;

        /**
        * @var 主题
        * @access protected
        */
        protected $_subject;

        /**
        * @var 邮件正文
        * @access protected
        */
        protected $_body;

        /**
        * @var 是否是HTML格式的邮件
        * @access protected
        */
        protected $_isHTML=true;

        /**
        * @var socket资源
        * @access protected
        */
        protected $_socket;

        /**
        * @var 错误信息
        * @access protected
        */
        protected $_errorMessage;

        public function __construct($from="", $to="", $subject="", $body="", $server="", $username="", $password="",$isHTML="", $port="") {
            if(!empty($from)){
                $this->_from = $from;
            }
            if(!empty($to)){
                $this->_to = $to;
            }
            if(!empty($subject)){
                $this->_subject = $subject;
            }
            if(!empty($body)){
                $this->_body = $body;
            }
            if(!empty($isHTML)){
                $this->_isHTML = $isHTML;
            }
            if(!empty($server)){
                $this->_sendServer = $server;
            }
            if(!empty($port)){
                $this->_port = $port;
            }
            if(!empty($username)){
                $this->_userName = $username;
            }
            if(!empty($password)){
                $this->_password = $password;
            }
        }

        /**
        * 设置邮件传输代理
        * @param string $server 代理服务器的ip或者域名
        * @param int $port 代理服务器的端口，smtp默认25号端口
        * @param int $localPort 本地端口
        * @return boolean
        */
        public function setServer($server, $port=25) {
            if(!isset($server) || empty($server) || !is_string($server)) {
                $this->_errorMessage = "first one is an invalid parameter";
                return false;
            }
            if(!is_numeric($port)){
                $this->_errorMessage = "first two is an invalid parameter";
                return false;
            }
            $this->_sendServer = $server;
            $this->_port = $port;
            return true;
        }

        /**
        * 设置邮件
        * @access public
        * @param array $config 邮件配置信息
        * 包含邮件发送人、接收人、主题、内容、邮件传输代理的验证信息
        * @return boolean
        */
        public function setMailInfo($config) {
            if(!is_array($config) || count($config)                 $this->_errorMessage = "parameters are required";
                return false;
            }

            $this->_from = $config['from'];
            $this->_to = $config['to'];
            $this->_subject = $config['subject'];
            $this->_body = $config['body'];
            $this->_userName = $config['username'];
            $this->_password = $config['password'];
            if(isset($config['isHTML'])){
                $this->_isHTML = $config['isHTML'];
            }

            return true;
        }

        /**
        * 发送邮件
        * @access public
        * @return boolean
        */
        public function sendMail() {
            $command = $this->getCommand();
            $this->socket();

            foreach ($command as $value) {
                if($this->sendCommand($value[0], $value[1])) {
                    continue;
                }
                else{
                    return false;
                }
            }

            $this->close(); //其实这里也没必要关闭，smtp命令：QUIT发出之后，服务器就关闭了连接，本地的socket资源会自动释放
            echo 'Mail OK!';
            return true;
        }

        /**
        * 返回错误信息
        * @return string
        */
        public function error(){
            if(!isset($this->_errorMessage)) {
                $this->_errorMessage = "";
            }
            return $this->_errorMessage;
        }

        /**
        * 返回mail命令
        * @access protected
        * @return array
        */
        protected function getCommand() {
            if($this->_isHTML) {
                $mail = "MIME-Version:1.0\r\n";
                $mail .= "Content-type:text/html;charset=utf-8\r\n";
                $mail .= "FROM:test_from . ">\r\n";
                $mail .= "TO:_to . ">\r\n";
                $mail .= "Subject:" . $this->_subject ."\r\n\r\n";
                $mail .= $this->_body . "\r\n.\r\n";
            }
            else{
                $mail = "FROM:test_from . ">\r\n";
                $mail .= "TO:_to . ">\r\n";
                $mail .= "Subject:" . $this->_subject ."\r\n\r\n";
                $mail .= $this->_body . "\r\n.\r\n";
            }
            $command = array(
                    array("HELO sendmail\r\n", 250),
                    array("AUTH LOGIN\r\n", 334),
                    array(base64_encode($this->_userName) . "\r\n", 334),
                    array(base64_encode($this->_password) . "\r\n", 235),
                    array("MAIL FROM:_from . ">\r\n", 250),
                    array("RCPT TO:_to . ">\r\n", 250),
                    array("DATA\r\n", 354),
                    array($mail, 250),
                    array("QUIT\r\n", 221)
            );
            return $command;
        }

        /**
        * @access protected
        * @param string $command 发送到服务器的smtp命令
        * @param int $code 期望服务器返回的响应吗
        * @param boolean
        */
        protected function sendCommand($command, $code) {
            echo 'Send command:' . $command . ',expected code:' . $code . '';
            //发送命令给服务器
            try{
                if(socket_write($this->_socket, $command, strlen($command))){
                    //读取服务器返回
                    $data = trim(socket_read($this->_socket, 1024));
                    echo 'response:' . $data . '';
                    if($data) {
                        $pattern = "/^".$code."/";
                        if(preg_match($pattern, $data)) {
                            return true;
                        }
                        else{
                            $this->_errorMessage = "Error:" . $data . "|**| command:";
                            return false;
                        }
                    }
                    else{
                        $this->_errorMessage = "Error:" . socket_strerror(socket_last_error());
                        return false;
                    }
                }
                else{
                    $this->_errorMessage = "Error:" . socket_strerror(socket_last_error());
                    return false;
                }
            }catch(Exception $e) {
                $this->_errorMessage = "Error:" . $e->getMessage();
            }
        }

        /**
        * 建立到服务器的网络连接
        * @access private
        * @return boolean
        */
        private function socket() {
            if(!function_exists("socket_create")) {
                $this->_errorMessage = "extension php-sockets must be enabled";
                return false;
            }
            //创建socket资源
            $this->_socket = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));

            if(!$this->_socket) {
                $this->_errorMessage = socket_strerror(socket_last_error());
                return false;
            }

            //连接服务器
            if(!socket_connect($this->_socket, $this->_sendServer, $this->_port)) {
                $this->_errorMessage = socket_strerror(socket_last_error());
                return false;
            }
            socket_read($this->_socket, 1024);

            return true;
        }

        /**
        * 关闭socket
        * @access private
        * @return boolean
        */
        private function close() {
            if(isset($this->_socket) && is_object($this->_socket)) {
                $this->_socket->close();
                return true;
            }
            $this->_errorMessage = "no resource can to be close";
            return false;
        }
    }


    /**************************** Test ***********************************/
    $config = array(
            "from" => "********@163.com",
            "to" => "******@163.com",
            "subject" => "test",
            "body" => "test",
            "username" => "******",
            "password" => "password",
        );

    $mail = new MySendMail();

    $mail->setServer("smtp.163.com");

    $mail->setMailInfo($config);
    if(!$mail->sendMail()){
        echo $mail->error();
        return 1;
    }

PHP, HTML