PHP 高级特性四之 SMTP 邮件发送 | 珊瑚贝

综述

PHP 的邮件发送最常见的便是 SMTP,通过编写一个 Smtp 类,设置好 smtp 服务器,邮箱用户名,密码,即可实现邮件的发送

邮件发送

邮件发送的类如下,文件名叫做

email.class.php
<?php

/* smtp class */
class smtp {
/* Public Variables */
var $smtp_port;
var $time_out;
var $host_name;
var $log_file;
var $relay_host;
var $debug;
var $auth;
var $user;
var $pass;
/* Private Variables */
var $sock;
/* Constractor */
function smtp($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 = "";
$this->sock = FALSE;
}
/* Main Function */
function sendmail($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\r\n";
}
$header.= "To: " . $to . "\r\n";
if ($cc != "") {
$header.= "Cc: " . $cc . "\r\n";
}
$header.= "From: $from<" . $from . ">\r\n";
$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 $sent;
}
/* Private Functions */
function smtp_send($helo, $from, $to, $header, $body = "") {
if (!$this->smtp_putcmd("HELO", $helo)) {
return $this->smtp_error("sending HELO command");
}
//auth
if ($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 $this->smtp_error("sending QUIT command");
}
return TRUE;
}
function smtp_sockopen($address) {
if ($this->relay_host == "") {
return $this->smtp_sockopen_mx($address);
} else {
return $this->smtp_sockopen_relay();
}
}
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 " . $this->relay_host . "\n");
return TRUE;;
}
function smtp_sockopen_mx($address) {
$domain = preg_replace("/^.+@([^@]+)$/", "\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(", ", $MXHOSTS) . ")\n");
return FALSE;
}
function smtp_message($header, $body) {
fputs($this->sock, $header . "\r\n" . $body);
$this->smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));
return TRUE;
}
function smtp_eom() {
fputs($this->sock, "\r\n.\r\n");
$this->smtp_debug(". [EOM]\n");
return $this->smtp_ok();
}
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 \"" . $response . "\"\n");
return FALSE;
}
return TRUE;
}
function smtp_putcmd($cmd, $arg = "") {
if ($arg != "") {
if ($cmd == "") $cmd = $arg;
else $cmd = $cmd . " " . $arg;
}
fputs($this->sock, $cmd . "\r\n");
$this->smtp_debug("> " . $cmd . "\n");
return $this->smtp_ok();
}
function smtp_error($string) {
$this->log_write("Error: Error occurred while " . $string . ".\n");
return FALSE;
}
function log_write($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;
}
function strip_comment($address) {
$comment = "/\([^()]*\)/";
while (preg_match($comment, $address)) {
$address = preg_replace($comment, "", $address);
}
return $address;
}
function get_address($address) {
$address = preg_replace("/([ \t\r\n])+/", "", $address);
$address = preg_replace("/^.*<(.+)>.*$/", "\1", $address);
return $address;
}
function smtp_debug($message) {
if ($this->debug) {
echo $message;
}
}
}
?>

然后便是一个 php 文件引用该文件,设置好各种参数

<!DOCTYPE>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>发送状态</title>
</head>
<body>
<?php

require_once "email.class.php";
//SMTP服务器
$smtpserver = "smtp.163.com";
//SMTP端口号?
$smtpserverport = 25;
//SMTP发邮件的邮箱
$smtpusermail = "cqc@163.com";
//发给谁
$smtpemailto = $_POST['toemail'];
//SMTP用户名,不加@163.com
$smtpuser = "cqc";
//SMTP用户密码
$smtppass = "wtf";
//主题
$mailtitle = $_POST['topic'];
//构建内容
$mailcontent = "TA的名字 ".$_POST['name']."<br>内容: ".$_POST['content'];
//邮件内容为HTML格式
$mailtype = "HTML";
//实例化对象
$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);
//关闭调试信息
$smtp->debug = false;
//发送邮件
$state = $smtp->sendmail($smtpemailto, $smtpusermail, $mailtitle, $mailcontent, $mailtype);
//检查发送状态
if($state==""){
echo "邮件发送失败,请检查密码或其他设置";
}else if(strlen($state)!=0){
//发送成功
echo "邮件发送成功";
}else{
echo "未知错误";
}

?>
</body>
</html>

最后是一个表单提交,包括目的邮箱,主题,内容

<!DOCTYPE>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>PHP利用SMTP发送邮件范例</title>
</head>
<body>
<form action="sendmail.php" method="post">
<p>收件人:<input type="text" name="toemail" /></p>
<p>&nbsp;&nbsp;题:<input type="text" name="topic" /></p>
<p>&nbsp;&nbsp;名:<input type="text" name="name" /></p>
<p>&nbsp;&nbsp;容:<textarea name="content" cols="50" rows="5"></textarea></p>
<p><input type="submit" value="发送" /></p>
</form>
</body>
</html>

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