背景
- 需求：遇到一个项目需要服务器发送一封通知邮件给用户。本来以为很难，结果业主方的OA系统邮件是标准的smtp协议。一下子很简单了。服务端使用的PHP开发的，因此搞定PHP的smtp功能即可。
一轮网上的搜索，发现原生的mail确实麻烦。我尝试配置IIS，效果不理想。找了phpMailer（GitHub）等相关项目，又太过复杂庞大，因为需求简单而时间很紧，就找了过去他人开发的一个通用class使用
- 原作者出处： http://www.daixiaorui.com
方案
- 使用找来的代码，进行一定的改造适配。原本的版本是适配PHP5.0，我这里服务端已经到PHP7.X。
- 维护通用smtp类供应请求使用
- 维护一个响应客户端请求的脚本即可
实战
- 部署到业主服务器之前，先配置个人的163邮箱smtp功能做测试
- 业主提供相关smtp服务器信息之后，一次成功
- 优化余地：业主方也提供pop3协议读取邮件，后续应该可以配套邮件读取的响应处理
<?php
/**
* copyright ：http://www.daixiaorui.com
* created by YYXOCHEN on 2018.09.27
* 借用他人成熟方案， 原始代码为php5，适当改造为适配php7
* -----------------------------------------------------
* 使用范例：
* require_once "util/smtp.class.php";
* //******************** 配置信息 ********************************
* $smtpserver = "smtp.163.com";//SMTP服务器
* $smtpserverport =25;//SMTP服务器端口
* $smtpusermail = "XXX@163.com";//SMTP服务器的用户邮箱
* $smtpemailto = $_POST['toemail'];//发送给谁
* $smtpuser = "XXX";//SMTP服务器的用户帐号
* $smtppass = "XXX";//SMTP服务器的用户密码，不是登录密码，是smtp功能开通后的专用密码
* $mailtitle = $_POST['title'];//邮件主题
* $mailcontent = "<h1>".$_POST['content']."</h1>";//邮件内容
* $mailtype = "HTML";//邮件格式（HTML/TXT）,TXT为文本邮件
* //************************ 配置信息 ****************************
* $smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);//这里面的一个true是表示使用身份验证,否则不使用身份验证.
* $smtp->debug = true;//是否显示发送的调试信息
* $state = $smtp->sendmail($smtpemailto, $smtpusermail, $mailtitle, $mailcontent, $mailtype);
* echo "<div style='width:300px; margin:36px auto;'>";
* if($state==""){
* echo "对不起，邮件发送失败！请检查邮箱填写是否有误。";
* echo "<a href='index.html'>点此返回</a>";
* exit();
* }
* echo "恭喜！邮件发送成功！！";
* echo "<a href='index.html'>点此返回</a>";
* echo "</div>";
*/
class smtp
{
/* Public Variables */
public $smtp_port;
public $time_out;
public $host_name;
public $log_file;
public $relay_host;
public $debug;
public $auth;
public $user;
public $pass;
/* Private Variables */
public $sock;
/* Constractor */
public function __construct($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass)
{
$this->debug = false;
$this->smtp_port = $smtp_port;
$this->relay_host = $relay_host;
$this->time_out = 30; //is used in fsockopen()
$this->auth = $auth; //auth
$this->user = $user;
$this->pass = $pass;
$this->host_name = "localhost"; //is used in HELO command
$this->log_file = "";
$this->sock = false;
}
/* Main Function */
public function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
{
$mail_from = $this->get_address($this->strip_comment($from));
$body = preg_replace("/(^|(\r\n))(\.)/", "\1.\3", $body);
$header = "MIME-Version:1.0\r\n";
if ($mailtype == "HTML") {
$header .= "Content-Type:text/html;charset=utf-8\r\n";
}
$header .= "To: " . $to . "\r\n";
if ($cc != "") {
$header .= "Cc: " . $cc . "\r\n";
}
$header .= "From: $from<" . $from . ">\r\n";
$subject = mb_convert_encoding($subject, 'gbk', 'utf8');
$header .= "Subject: " . $subject . "\r\n";
$header .= $additional_headers;
$header .= "Date: " . date("r") . "\r\n";
$header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")\r\n";
list($msec, $sec) = explode(" ", microtime());
$header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">\r\n";
$TO = explode(",", $this->strip_comment($to));
if ($cc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
}
if ($bcc != "") {
$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
}
$sent = true;
foreach ($TO as $rcpt_to) {
$rcpt_to = $this->get_address($rcpt_to);
if (!$this->smtp_sockopen($rcpt_to)) {
$this->log_write("Error: Cannot send email to " . $rcpt_to . "\n");
$sent = false;
continue;
}
if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
$this->log_write("E-mail has been sent to <" . $rcpt_to . ">\n");
} else {
$this->log_write("Error: Cannot send email to <" . $rcpt_to . ">\n");
$sent = false;
}
fclose($this->sock);
$this->log_write("Disconnected from remote host\n");
}
return $sent;
}
/* Private Functions */
public function smtp_send($helo, $from, $to, $header, $body = "")
{
if (!$this->smtp_putcmd("HELO", $helo)) {
return $this->smtp_error("sending HELO command");
}
if ($this->auth) {
if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
return $this->smtp_error("sending HELO command");
}
if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
return $this->smtp_error("sending HELO command");
}
}
if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) {
return $this->smtp_error("sending MAIL FROM command");
}
if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) {
return $this->smtp_error("sending RCPT TO command");
}
if (!$this->smtp_putcmd("DATA")) {
return $this->smtp_error("sending DATA command");
}
if (!$this->smtp_message($header, $body)) {
return $this->smtp_error("sending message");
}
if (!$this->smtp_eom()) {
return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
}
if (!$this->smtp_putcmd("QUIT")) {
return $this->smtp_error("sending QUIT command");
}
return true;
}
public function smtp_sockopen($address)
{
if ($this->relay_host == "") {
return $this->smtp_sockopen_mx($address);
} else {
return $this->smtp_sockopen_relay();
}
}
public function smtp_sockopen_relay()
{
$this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "\n");
$this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "\n");
$this->log_write("Error: " . $errstr . " (" . $errno . ")\n");
return false;
}
$this->log_write("Connected to relay host " . $this->relay_host . "\n");
return true;
}
public function smtp_sockopen_mx($address)
{
$domain = preg_replace("/^.+@([^@]+)$/i", "$1", $address);
if (!@getmxrr($domain, $MXHOSTS)) {
$this->log_write("Error: Cannot resolve MX \"" . $domain . "\"\n");
return false;
}
foreach ($MXHOSTS as $host) {
$this->log_write("Trying to " . $host . ":" . $this->smtp_port . "\n");
$this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
if (!($this->sock && $this->smtp_ok())) {
$this->log_write("Warning: Cannot connect to mx host " . $host . "\n");
$this->log_write("Error: " . $errstr . " (" . $errno . ")\n");
continue;
}
$this->log_write("Connected to mx host " . $host . "\n");
return true;
}
$this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n");
return false;
}
public function smtp_message($header, $body)
{
fputs($this->sock, $header . "\r\n" . $body);
$this->smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));
return true;
}
public function smtp_eom()
{
fputs($this->sock, "\r\n.\r\n");
$this->smtp_debug(". [EOM]\n");
return $this->smtp_ok();
}
public function smtp_ok()
{
$response = str_replace("\r\n", "", fgets($this->sock, 512));
$this->smtp_debug($response . "\n");
if (!preg_match("/^[23]/", $response)) {
fputs($this->sock, "QUIT\r\n");
fgets($this->sock, 512);
$this->log_write("Error: Remote host returned \"" . $response . "\"\n");
return false;
}
return true;
}
public function smtp_putcmd($cmd, $arg = "")
{
if ($arg != "") {
if ($cmd == "") {
$cmd = $arg;
} else {
$cmd = $cmd . " " . $arg;
}
}
fputs($this->sock, $cmd . "\r\n");
$this->smtp_debug("> " . $cmd . "\n");
return $this->smtp_ok();
}
public function smtp_error($string)
{
$this->log_write("Error: Error occurred while " . $string . ".\n");
return false;
}
public function log_write($message)
{
$this->smtp_debug($message);
if ($this->log_file == "") {
return true;
}
$message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;
if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) {
$this->smtp_debug("Warning: Cannot open log file \"" . $this->log_file . "\"\n");
return false;
}
flock($fp, LOCK_EX);
fputs($fp, $message);
fclose($fp);
return true;
}
public function strip_comment($address)
{
$comment = "/\([^()]*\)/";
while (preg_match($comment, $address)) {
$address = ereg_replace($comment, "", $address);
}
return $address;
}
public function get_address($address)
{
$address = preg_replace("/([ \t\r\n])+/", "", $address);
$address = preg_replace("/^.*<(.+)>.*$/", "\1", $address);
return $address;
}
public function smtp_debug($message)
{
if ($this->debug) {
echo $message;
}
}
}
?>
