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标题 PHP实现支持SSL连接的SMTP邮件发送类
内容
    这篇文章主要介绍了PHP实现支持SSL连接的SMTP邮件发送类,实例分析了php实现smtp邮件发送类的原理与技巧,以及支持SSL连接的方法,需要的朋友可以参考下
    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：
    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("", "", "XXXXX"); //设置smtp服务器，普通连接方式
    * $mail->setServer("smtp.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。
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更新时间：2025/5/16 17:08:03