PHP实现支持SSL连接的SMTP邮件发送类

本文实例讲述了php实现支持ssl连接的smtp邮件发送类。分享给大家供大家参考。具体如下：

该实例代码测试过了gmail和qq邮箱的smtp。具体代码如下：

<?php
/**
* 邮件发送类
* 支持发送纯文本邮件和html格式的邮件，可以多收件人，多抄送，多秘密抄送，带附件(单个或多个附件),支持到服务器的ssl连接
* 需要的php扩展：sockets、fileinfo和openssl。
* 编码格式是utf-8，传输编码格式是base64
* @example
* $mail = new mysendmail();
* $mail->setserver("[e-mail]", "[e-mail]", "xxxxx"); //设置smtp服务器，普通连接方式
* $mail->setserver("smtp.gmail.com", "[e-mail]", "xxxxx", 465, true); //设置smtp服务器，到服务器的ssl连接
* $mail->setfrom("xxxxx"); //设置发件人
* $mail->setreceiver("xxxxx"); //设置收件人，多个收件人，调用多次
* $mail->setcc("xxxx"); //设置抄送，多个抄送，调用多次
* $mail->setbcc("xxxxx"); //设置秘密抄送，多个秘密抄送，调用多次
* $mail->addattachment("xxxx"); //添加附件，多个附件，调用多次
* $mail->setmail("test", "<b>test</b>"); //设置邮件主题、内容
* $mail->sendmail(); //发送
*/
class mysendmail {
    /**
    * @var string 邮件传输代理用户名
    * @access protected
    */
    protected $_username;
    /**
    * @var string 邮件传输代理密码
    * @access protected
    */
    protected $_password;
    /**
    * @var string 邮件传输代理服务器地址
    * @access protected
    */
    protected $_sendserver;
    /**
    * @var int 邮件传输代理服务器端口
    * @access protected
    */
    protected $_port;
    /**
    * @var string 发件人
    * @access protected
    */
    protected $_from;
    /**
    * @var array 收件人
    * @access protected
    */
    protected $_to = array();
    /**
    * @var array 抄送
    * @access protected
    */
    protected $_cc = array();
    /**
    * @var array 秘密抄送
    * @access protected
    */
    protected $_bcc = array();
    /**
    * @var string 主题
    * @access protected
    */
    protected $_subject;
    /**
    * @var string 邮件正文
    * @access protected
    */
    protected $_body;
    /**
    * @var array 附件
    * @access protected
    */
    protected $_attachment = array();
    /**
    * @var reource socket资源
    * @access protected
    */
    protected $_socket;
    /**
    * @var reource 是否是安全连接
    * @access protected
    */
    protected $_issecurity;
    /**
    * @var string 错误信息
    * @access protected
    */
    protected $_errormessage;
    /**
    * 设置邮件传输代理，如果是可以匿名发送有邮件的服务器，只需传递代理服务器地址就行
    * @access public
    * @param string $server 代理服务器的ip或者域名
    * @param string $username 认证账号
    * @param string $password 认证密码
    * @param int $port 代理服务器的端口，smtp默认25号端口
    * @param boolean $issecurity 到服务器的连接是否为安全连接，默认false
    * @return boolean
    */
    public function setserver($server, $username="", $password="", $port=25, $issecurity=false) {
        $this->_sendserver = $server;
        $this->_port = $port;
        $this->_issecurity = $issecurity;
        $this->_username = empty($username) ? "" : base64_encode($username);
        $this->_password = empty($password) ? "" : base64_encode($password);
        return true;
    }
    /**
    * 设置发件人
    * @access public
    * @param string $from 发件人地址
    * @return boolean
    */
    public function setfrom($from) {
        $this->_from = $from;
        return true;
    }
    /**
    * 设置收件人，多个收件人，调用多次.
    * @access public
    * @param string $to 收件人地址
    * @return boolean
    */
    public function setreceiver($to) {
        $this->_to[] = $to;
        return true;
    }
    /**
    * 设置抄送，多个抄送，调用多次.
    * @access public
    * @param string $cc 抄送地址
    * @return boolean
    */
    public function setcc($cc) {
        $this->_cc[] = $cc;
        return true;
    }
    /**
    * 设置秘密抄送，多个秘密抄送，调用多次
    * @access public
    * @param string $bcc 秘密抄送地址
    * @return boolean
    */
    public function setbcc($bcc) {
        $this->_bcc[] = $bcc;
        return true;
    }
    /**
    * 设置邮件附件，多个附件，调用多次
    * @access public
    * @param string $file 文件地址
    * @return boolean
    */
    public function addattachment($file) {
        if(!file_exists($file)) {
            $this->_errormessage = "file " . $file . " does not exist.";
            return false;
        }
        $this->_attachment[] = $file;
        return true;
    }
    /**
    * 设置邮件信息
    * @access public
    * @param string $body 邮件主题
    * @param string $subject 邮件主体内容，可以是纯文本，也可是是html文本
    * @return boolean
    */
    public function setmail($subject, $body) {
        $this->_subject = base64_encode($subject);
        $this->_body = base64_encode($body);
        return true;
    }
    /**
    * 发送邮件
    * @access public
    * @return boolean
    */
    public function sendmail() {
        $command = $this->getcommand();
        $this->_issecurity ? $this->socketsecurity() : $this->socket();
        foreach ($command as $value) {
            $result = $this->_issecurity ? $this->sendcommandsecurity($value[0], $value[1]) : $this->sendcommand($value[0], $value[1]);
            if($result) {
                continue;
            }
            else{
                return false;
            }
        }
        //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
        $this->_issecurity ? $this->closesecutity() : $this->close();
        return true;
    }
    /**
    * 返回错误信息
    * @return string
    */
    public function error(){
        if(!isset($this->_errormessage)) {
            $this->_errormessage = "";
        }
        return $this->_errormessage;
    }
    /**
    * 返回mail命令
    * @access protected
    * @return array
    */
    protected function getcommand() {
        $separator = "----=_part_" . md5($this->_from . time()) . uniqid(); //分隔符
        $command = array(
                array("helo sendmail\r\n", 250)
            );
        if(!empty($this->_username)){
            $command[] = array("auth login\r\n", 334);
            $command[] = array($this->_username . "\r\n", 334);
            $command[] = array($this->_password . "\r\n", 235);
        }
        //设置发件人
        $command[] = array("mail from: <" . $this->_from . ">\r\n", 250);
        $header = "from: <" . $this->_from . ">\r\n";
        //设置收件人
        if(!empty($this->_to)) {
            $count = count($this->_to);
            if($count == 1){
                $command[] = array("rcpt to: <" . $this->_to[0] . ">\r\n", 250);
                $header .= "to: <" . $this->_to[0] .">\r\n";
            }
            else{
                for($i=0; $i<$count; $i++){
                    $command[] = array("rcpt to: <" . $this->_to[$i] . ">\r\n", 250);
                    if($i == 0){
                        $header .= "to: <" . $this->_to[$i] .">";
                    }
                    elseif($i + 1 == $count){
                        $header .= ",<" . $this->_to[$i] .">\r\n";
                    }
                    else{
                        $header .= ",<" . $this->_to[$i] .">";
                    }
                }
            }
        }
        //设置抄送
        if(!empty($this->_cc)) {
            $count = count($this->_cc);
            if($count == 1){
                $command[] = array("rcpt to: <" . $this->_cc[0] . ">\r\n", 250);
                $header .= "cc: <" . $this->_cc[0] .">\r\n";
            }
            else{
                for($i=0; $i<$count; $i++){
                    $command[] = array("rcpt to: <" . $this->_cc[$i] . ">\r\n", 250);
                    if($i == 0){
                    $header .= "cc: <" . $this->_cc[$i] .">";
                    }
                    elseif($i + 1 == $count){
                        $header .= ",<" . $this->_cc[$i] .">\r\n";
                    }
                    else{
                        $header .= ",<" . $this->_cc[$i] .">";
                    }
                }
            }
        }
        //设置秘密抄送
        if(!empty($this->_bcc)) {
            $count = count($this->_bcc);
            if($count == 1) {
                $command[] = array("rcpt to: <" . $this->_bcc[0] . ">\r\n", 250);
                $header .= "bcc: <" . $this->_bcc[0] .">\r\n";
            }
            else{
                for($i=0; $i<$count; $i++){
                    $command[] = array("rcpt to: <" . $this->_bcc[$i] . ">\r\n", 250);
                    if($i == 0){
                    $header .= "bcc: <" . $this->_bcc[$i] .">";
                    }
                    elseif($i + 1 == $count){
                        $header .= ",<" . $this->_bcc[$i] .">\r\n";
                    }
                    else{
                        $header .= ",<" . $this->_bcc[$i] .">";
                    }
                }
            }
        }
        //主题
        $header .= "subject: =?utf-8?b?" . $this->_subject ."?=\r\n";
        if(isset($this->_attachment)) {
            //含有附件的邮件头需要声明成这个
            $header .= "content-type: multipart/mixed;\r\n";
        }
        elseif(false){
            //邮件体含有图片资源的,且包含的图片在邮件内部时声明成这个，如果是引用的远程图片，就不需要了
            $header .= "content-type: multipart/related;\r\n";
        }
        else{
            //html或者纯文本的邮件声明成这个
            $header .= "content-type: multipart/alternative;\r\n";
        }
        //邮件头分隔符
        $header .= "\t" . 'boundary="' . $separator . '"';
        $header .= "\r\nmime-version: 1.0\r\n";
        //这里开始是邮件的body部分，body部分分成几段发送
        $header .= "\r\n--" . $separator . "\r\n";
        $header .= "content-type:text/html; charset=utf-8\r\n";
        $header .= "content-transfer-encoding: base64\r\n\r\n";
        $header .= $this->_body . "\r\n";
        $header .= "--" . $separator . "\r\n";
        //加入附件
        if(!empty($this->_attachment)){
            $count = count($this->_attachment);
            for($i=0; $i<$count; $i++){
                $header .= "\r\n--" . $separator . "\r\n";
                $header .= "content-type: " . $this->getmimetype($this->_attachment[$i]) . '; name="=?utf-8?b?' . base64_encode( basename($this->_attachment[$i]) ) . '?="' . "\r\n";
                $header .= "content-transfer-encoding: base64\r\n";
                $header .= 'content-disposition: attachment; filename="=?utf-8?b?' . base64_encode( basename($this->_attachment[$i]) ) . '?="' . "\r\n";
                $header .= "\r\n";
                $header .= $this->readfile($this->_attachment[$i]);
                $header .= "\r\n--" . $separator . "\r\n";
            }
        }
        //结束邮件数据发送
        $header .= "\r\n.\r\n";
 
        $command[] = array("data\r\n", 354);
        $command[] = array($header, 250);
        $command[] = array("quit\r\n", 221);
        return $command;
    }
    /**
    * 发送命令
    * @access protected
    * @param string $command 发送到服务器的smtp命令
    * @param int $code 期望服务器返回的响应吗
    * @return boolean
    */
    protected function sendcommand($command, $code) {
        echo 'send command:' . $command . ',expected code:' . $code . '<br />';
        //发送命令给服务器
        try{
            if(socket_write($this->_socket, $command, strlen($command))){
                //当邮件内容分多次发送时，没有$code，服务器没有返回
                if(empty($code))  {
                    return true;
                }
                //读取服务器返回
                $data = trim(socket_read($this->_socket, 1024));
                echo 'response:' . $data . '<br /><br />';
                if($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();
        }
    }
    /**
    * 安全连接发送命令
    * @access protected
    * @param string $command 发送到服务器的smtp命令
    * @param int $code 期望服务器返回的响应吗
    * @return boolean
    */
    protected function sendcommandsecurity($command, $code) {
        echo 'send command:' . $command . ',expected code:' . $code . '<br />';
        try {
            if(fwrite($this->_socket, $command)){
                //当邮件内容分多次发送时，没有$code，服务器没有返回
                if(empty($code))  {
                    return true;
                }
                //读取服务器返回
                $data = trim(fread($this->_socket, 1024));
                echo 'response:' . $data . '<br /><br />';
                if($data) {
                    $pattern = "/^".$code."+?/";
                    if(preg_match($pattern, $data)) {
                        return true;
                    }
                    else{
                        $this->_errormessage = "error:" . $data . "|**| command:";
                        return false;
                    }
                }
                else{
                    return false;
                }
            }
            else{
                $this->_errormessage = "error: " . $command . " send failed";
                return false;
            }
        }catch(exception $e) {
            $this->_errormessage = "error:" . $e->getmessage();
        }
    }
    /**
    * 读取附件文件内容，返回base64编码后的文件内容
    * @access protected
    * @param string $file 文件
    * @return mixed
    */
    protected function readfile($file) {
        if(file_exists($file)) {
            $file_obj = file_get_contents($file);
            return base64_encode($file_obj);
        }
        else {
            $this->_errormessage = "file " . $file . " dose not exist";
            return false;
        }
    }
    /**
    * 获取附件mime类型
    * @access protected
    * @param string $file 文件
    * @return mixed
    */
    protected function getmimetype($file) {
        if(file_exists($file)) {
            $mime = mime_content_type($file);
            /*if(! preg_match("/gif|jpg|png|jpeg/", $mime)){
                $mime = "application/octet-stream";
            }*/
            return $mime;
        }
        else {
            return false;
        }
    }
    /**
    * 建立到服务器的网络连接
    * @access protected
    * @return boolean
    */
    protected function socket() {
        //创建socket资源
        $this->_socket = socket_create(af_inet, sock_stream, getprotobyname('tcp'));
        if(!$this->_socket) {
            $this->_errormessage = socket_strerror(socket_last_error());
            return false;
        }
        socket_set_block($this->_socket);//设置阻塞模式
        //连接服务器
        if(!socket_connect($this->_socket, $this->_sendserver, $this->_port)) {
            $this->_errormessage = socket_strerror(socket_last_error());
            return false;
        }
        $str = socket_read($this->_socket, 1024);
        if(!preg_match("/220+?/", $str)){
            $this->_errormessage = $str;
            return false;
        }
        return true;
    }
    /**
    * 建立到服务器的ssl网络连接
    * @access protected
    * @return boolean
    */
    protected function socketsecurity() {
        $remoteaddr = "tcp://" . $this->_sendserver . ":" . $this->_port;
        $this->_socket = stream_socket_client($remoteaddr, $errno, $errstr, 30);
        if(!$this->_socket){
            $this->_errormessage = $errstr;
            return false;
        }
        //设置加密连接，默认是ssl，如果需要tls连接，可以查看php手册stream_socket_enable_crypto函数的解释
        stream_socket_enable_crypto($this->_socket, true, stream_crypto_method_sslv23_client);
        stream_set_blocking($this->_socket, 1); //设置阻塞模式
        $str = fread($this->_socket, 1024);
        if(!preg_match("/220+?/", $str)){
            $this->_errormessage = $str;
            return false;
        }
        return true;
    }
    /**
    * 关闭socket
    * @access protected
    * @return boolean
    */
    protected function close() {
        if(isset($this->_socket) && is_object($this->_socket)) {
            $this->_socket->close();
            return true;
        }
        $this->_errormessage = "no resource can to be close";
        return false;
    }
    /**
    * 关闭安全socket
    * @access protected
    * @return boolean
    */
    protected function closesecutity() {
        if(isset($this->_socket) && is_object($this->_socket)) {
            stream_socket_shutdown($this->_socket, stream_shut_wr);
            return true;
        }
        $this->_errormessage = "no resource can to be close";
        return false;
    }
}

希望本文所述对大家的php程序设计有所帮助。