PHP编程：PHP实现支持SSL连接的SMTP邮件发送类

<?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("smtp@126.com","XXXXX@126.com","XXXXX"); //设置smtp服务器,普通连接方式
* $mail->setServer("smtp.gmail.com","XXXXX@gmail.com","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 是否是平安连接
??? * @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 $isSecurity 到服务器的连接是否为平安连接,默认false
??? * @return boolean
??? */
??? public function setServer($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,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,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,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,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
??????? $command = array(
??????????????? array("HELO sendmailrn",250)
??????????? );
??????? if(!empty($this->_userName)){
??????????? $command[] = array("AUTH LOGINrn",334);
??????????? $command[] = array($this->_userName . "rn",334);
??????????? $command[] = array($this->_password . "rn",235);
??????? }
??????? //设置发件人
??????? $command[] = array("MAIL FROM: <" . $this->_from . ">rn",250);
??????? $header = "FROM: <" . $this->_from . ">rn";
??????? //设置收件人
??????? if(!empty($this->_to)) {
??????????? $count = count($this->_to);
??????????? if($count == 1){
??????????????? $command[] = array("RCPT TO: <" . $this->_to[0] . ">rn",250);
??????????????? $header .= "TO: <" . $this->_to[0] .">rn";
??????????? }
??????????? else{
??????????????? for($i=0; $i<$count; $i++){
??????????????????? $command[] = array("RCPT TO: <" . $this->_to[$i] . ">rn",250);
??????????????????? if($i == 0){
??????????????????????? $header .= "TO: <" . $this->_to[$i] .">";
??????????????????? }
??????????????????? elseif($i + 1 == $count){
??????????????????????? $header .= ",<" . $this->_to[$i] .">rn";
??????????????????? }
??????????????????? 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] . ">rn",250);
??????????????? $header .= "CC: <" . $this->_cc[0] .">rn";
??????????? }
??????????? else{
??????????????? for($i=0; $i<$count; $i++){
??????????????????? $command[] = array("RCPT TO: <" . $this->_cc[$i] . ">rn",250);
??????????????????? if($i == 0){
??????????????????? $header .= "CC: <" . $this->_cc[$i] .">";
??????????????????? }
??????????????????? elseif($i + 1 == $count){
??????????????????????? $header .= ",<" . $this->_cc[$i] .">rn";
??????????????????? }
??????????????????? 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] . ">rn",250);
??????????????? $header .= "BCC: <" . $this->_bcc[0] .">rn";
??????????? }
??????????? else{
??????????????? for($i=0; $i<$count; $i++){
??????????????????? $command[] = array("RCPT TO: <" . $this->_bcc[$i] . ">rn",250);
??????????????????? if($i == 0){
??????????????????? $header .= "BCC: <" . $this->_bcc[$i] .">";
??????????????????? }
??????????????????? elseif($i + 1 == $count){
??????????????????????? $header .= ",<" . $this->_bcc[$i] .">rn";
??????????????????? }
??????????????????? else{
??????????????????????? $header .= ",<" . $this->_bcc[$i] .">";
??????????????????? }
??????????????? }
??????????? }
??????? }
??????? //主题
??????? $header .= "Subject: =?UTF-8?B?" . $this->_subject ."?=rn";
??????? if(isset($this->_attachment)) {
??????????? //含有附件的邮件头需要声明成这个
??????????? $header .= "Content-Type: multipart/mixed;rn";
??????? }
??????? 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;rn";
??????? }
??????? else{
??????????? //html或者纯文本的邮件声明成这个
??????????? $header .= "Content-Type: multipart/alternative;rn";
??????? }
??????? //邮件头分隔符
??????? $header .= "t" . 'boundary="' . $separator . '"';
??????? $header .= "rnMIME-Version: 1.0rn";
??????? //这里开始是邮件的body部分,body部分分成几段发送
??????? $header .= "rn--" . $separator . "rn";
??????? $header .= "Content-Type:text/html; charset=utf-8rn";
??????? $header .= "Content-Transfer-Encoding: base64rnrn";
??????? $header .= $this->_body . "rn";
??????? $header .= "--" . $separator . "rn";
??????? //加入附件
??????? if(!empty($this->_attachment)){
??????????? $count = count($this->_attachment);
??????????? for($i=0; $i<$count; $i++){
??????????????? $header .= "rn--" . $separator . "rn";
??????????????? $header .= "Content-Type: " . $this->getMIMEType($this->_attachment[$i]) . '; name="=?UTF-8?B?' . base64_encode( basename($this->_attachment[$i]) ) . '?="' . "rn";
??????????????? $header .= "Content-Transfer-Encoding: base64rn";
??????????????? $header .= 'Content-Disposition: attachment; filename="=?UTF-8?B?' . base64_encode( basename($this->_attachment[$i]) ) . '?="' . "rn";
??????????????? $header .= "rn";
??????????????? $header .= $this->readFile($this->_attachment[$i]);
??????????????? $header .= "rn--" . $separator . "rn";
??????????? }
??????? }
??????? //结束邮件数据发送
??????? $header .= "rn.rn";
?
??????? $command[] = array("DATArn",354);
??????? $command[] = array($header,250);
??????? $command[] = array("QUITrn",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();
??????? }
??? }
??? /**
??? * 平安连接发送命令
??? * @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,expected code:' . $code . '<br />';
??????? try {
??????????? if(fwrite($this->_socket,$command)){
??????????????? //当邮件内容分多次发送时,服务器没有返回
??????????????? if(empty($code))? {
??????????????????? return true;
??????????????? }
??????????????? //读取服务器返回
??????????????? $data = trim(fread($this->_socket,$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,$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;
??????? }
??????? $this->_errorMessage = "No resource can to be close";
??????? return false;
??? }
??? /**
??? * 关闭平安socket
??? * @access protected
??? * @return boolean
??? */
??? protected function closeSecutity() {
??????? if(isset($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;
??? }
}