這篇文章主要介紹了PHP實現(xiàn)支持SSL連接的SMTP郵件發(fā)送類,實例分析了php實現(xiàn)smtp郵件發(fā)送類的原理與技巧,以及支持SSL連接的方法,需要的朋友可以參考下
    本文實例講述了PHP實現(xiàn)支持SSL連接的SMTP郵件發(fā)送類。分享給大家供大家參考。具體如下：
    該實例代碼測試過了gmail和QQ郵箱的SMTP。具體代碼如下：
    代碼如下:
    <?php
    /**
    * 郵件發(fā)送類
    * 支持發(fā)送純文本郵件和HTML格式的郵件，可以多收件人，多抄送，多秘密抄送，帶附件(單個或多個附件),支持到服務器的ssl連接
    * 需要的php擴展：sockets、Fileinfo和openssl。
    * 編碼格式是UTF-8，傳輸編碼格式是base64
    * @example
    * $mail = new MySendMail();
    * $mail->setServer("", "", "XXXXX"); //設置smtp服務器，普通連接方式
    * $mail->setServer("smtp.gmail.com", "", "XXXXX", 465, true); //設置smtp服務器，到服務器的SSL連接
    * $mail->setFrom("XXXXX"); //設置發(fā)件人
    * $mail->setReceiver("XXXXX"); //設置收件人，多個收件人，調(diào)用多次
    * $mail->setCc("XXXX"); //設置抄送，多個抄送，調(diào)用多次
    * $mail->setBcc("XXXXX"); //設置秘密抄送，多個秘密抄送，調(diào)用多次
    * $mail->addAttachment("XXXX"); //添加附件，多個附件，調(diào)用多次
    * $mail->setMail("test", "<b>test</b>"); //設置郵件主題、內(nèi)容
    * $mail->sendMail(); //發(fā)送
    */
    class MySendMail {
    /**
    * @var string 郵件傳輸代理用戶名
    * @access protected
    */
    protected $_userName;
    /**
    * @var string 郵件傳輸代理密碼
    * @access protected
    */
    protected $_password;
    /**
    * @var string 郵件傳輸代理服務器地址
    * @access protected
    */
    protected $_sendServer;
    /**
    * @var int 郵件傳輸代理服務器端口
    * @access protected
    */
    protected $_port;
    /**
    * @var string 發(fā)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 主題
    * @access protected
    */
    protected $_subject;
    /**
    * @var string 郵件正文
    * @access protected
    */
    protected $_body;
    /**
    * @var array 附件
    * @access protected
    */
    protected $_attachment = array();
    /**
    * @var reource socket資源
    * @access protected
    */
    protected $_socket;
    /**
    * @var reource 是否是安全連接
    * @access protected
    */
    protected $_isSecurity;
    /**
    * @var string 錯誤信息
    * @access protected
    */
    protected $_errorMessage;
    /**
    * 設置郵件傳輸代理，如果是可以匿名發(fā)送有郵件的服務器，只需傳遞代理服務器地址就行
    * @access public
    * @param string $server 代理服務器的ip或者域名
    * @param string $username 認證賬號
    * @param string $password 認證密碼
    * @param int $port 代理服務器的端口，smtp默認25號端口
    * @param boolean $isSecurity 到服務器的連接是否為安全連接，默認false
    * @return boolean
    */
    public function setServer($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;
    }
    /**
    * 設置發(fā)件人
    * @access public
    * @param string $from 發(fā)件人地址
    * @return boolean
    */
    public function setFrom($from) {
    $this->_from = $from;
    return true;
    }
    /**
    * 設置收件人，多個收件人，調(diào)用多次.
    * @access public
    * @param string $to 收件人地址
    * @return boolean
    */
    public function setReceiver($to) {
    $this->_to[] = $to;
    return true;
    }
    /**
    * 設置抄送，多個抄送，調(diào)用多次.
    * @access public
    * @param string $cc 抄送地址
    * @return boolean
    */
    public function setCc($cc) {
    $this->_cc[] = $cc;
    return true;
    }
    /**
    * 設置秘密抄送，多個秘密抄送，調(diào)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;
    }
    /**
    * 設置郵件附件，多個附件，調(diào)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;
    }
    /**
    * 設置郵件信息
    * @access public
    * @param string $body 郵件主題
    * @param string $subject 郵件主體內(nèi)容，可以是純文本，也可是是HTML文本
    * @return boolean
    */
    public function setMail($subject, $body) {
    $this->_subject = base64_encode($subject);
    $this->_body = base64_encode($body);
    return true;
    }
    /**
    * 發(fā)送郵件
    * @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;
    }
    }
    //其實這里也沒必要關閉，smtp命令：QUIT發(fā)出之后，服務器就關閉了連接，本地的socket資源會自動釋放
    $this->_isSecurity ? $this->closeSecutity() : $this->close();
    return true;
    }
    /**
    * 返回錯誤信息
    * @return string
    */
    public function error(){
    if(!isset($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);
    }
    //設置發(fā)件人
    $command[] = array("MAIL FROM: <" . $this->_from . ">\r\n", 250);
    $header = "FROM: <" . $this->_from . ">\r\n";
    //設置收件人
    if(!empty($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] .">";
    }
    }
    }
    }
    //設置抄送
    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] .">";
    }
    }
    }
    }
    //設置秘密抄送
    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] .">";
    }
    }
    }
    }
    //主題
    $header .= "Subject: =?UTF-8?B?" . $this->_subject ."?=\r\n";
    if(isset($this->_attachment)) {
    //含有附件的郵件頭需要聲明成這個
    $header .= "Content-Type: multipart/mixed;\r\n";
    }
    elseif(false){
    //郵件體含有圖片資源的,且包含的圖片在郵件內(nèi)部時聲明成這個，如果是引用的遠程圖片，就不需要了
    $header .= "Content-Type: multipart/related;\r\n";
    }
    else{
    //html或者純文本的郵件聲明成這個
    $header .= "Content-Type: multipart/alternative;\r\n";
    }
    //郵件頭分隔符
    $header .= "\t" . 'boundary="' . $separator . '"';
    $header .= "\r\nMIME-Version: 1.0\r\n";
    //這里開始是郵件的body部分，body部分分成幾段發(fā)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";
    }
    }
    //結(jié)束郵件數(shù)據(jù)發(fā)送
    $header .= "\r\n.\r\n";
    $command[] = array("DATA\r\n", 354);
    $command[] = array($header, 250);
    $command[] = array("QUIT\r\n", 221);
    return $command;
    }
    /**
    * 發(fā)送命令
    * @access protected
    * @param string $command 發(fā)送到服務器的smtp命令
    * @param int $code 期望服務器返回的響應嗎
    * @return boolean
    */
    protected function sendCommand($command, $code) {
    echo 'Send command:' . $command . ',expected code:' . $code . '<br />';
    //發(fā)送命令給服務器
    try{
    if(socket_write($this->_socket, $command, strlen($command))){
    //當郵件內(nèi)容分多次發(fā)送時，沒有$code，服務器沒有返回
    if(empty($code)) {
    return true;
    }
    //讀取服務器返回
    $data = trim(socket_read($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();
    }
    }
    /**
    * 安全連接發(fā)送命令
    * @access protected
    * @param string $command 發(fā)送到服務器的smtp命令
    * @param int $code 期望服務器返回的響應嗎
    * @return boolean
    */
    protected function sendCommandSecurity($command, $code) {
    echo 'Send command:' . $command . ',expected code:' . $code . '<br />';
    try {
    if(fwrite($this->_socket, $command)){
    //當郵件內(nèi)容分多次發(fā)送時，沒有$code，服務器沒有返回
    if(empty($code)) {
    return true;
    }
    //讀取服務器返回
    $data = trim(fread($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();
    }
    }
    /**
    * 讀取附件文件內(nèi)容，返回base64編碼后的文件內(nèi)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;
    }
    }
    /**
    * 獲取附件MIME類型
    * @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;
    }
    }
    /**
    * 建立到服務器的網(wǎng)絡連接
    * @access protected
    * @return boolean
    */
    protected function socket() {
    //創(chuàng)建socket資源
    $this->_socket = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));
    if(!$this->_socket) {
    $this->_errorMessage = socket_strerror(socket_last_error());
    return false;
    }
    socket_set_block($this->_socket);//設置阻塞模式
    //連接服務器
    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;
    }
    /**
    * 建立到服務器的SSL網(wǎng)絡連接
    * @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 = $errstr;
    return false;
    }
    //設置加密連接，默認是ssl，如果需要tls連接，可以查看php手冊stream_socket_enable_crypto函數(shù)的解釋
    stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
    stream_set_blocking($this->_socket, 1); //設置阻塞模式
    $str = fread($this->_socket, 1024);
    if(!preg_match("/220+?/", $str)){
    $this->_errorMessage = $str;
    return false;
    }
    return true;
    }
    /**
    * 關閉socket
    * @access protected
    * @return boolean
    */
    protected function close() {
    if(isset($this->_socket) && is_object($this->_socket)) {
    $this->_socket->close();
    return true;
    }
    $this->_errorMessage = "No resource can to be close";
    return false;
    }
    /**
    * 關閉安全socket
    * @access protected
    * @return boolean
    */
    protected function closeSecutity() {
    if(isset($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;
    }
    }
    希望本文所述對大家的php程序設計有所幫助。