PHP电子邮件自动回复：极大提升客户满意度的好方法。

<?php
require_once "PHPMailer/PHPMailer.php";
require_once "PHPMailer/SMTP.php";
require_once "PHPMailer/Exception.php";

use PHPMailerPHPMailerPHPMailer;
use PHPMailerPHPMailerException;

// 获取收到的邮件内容
$mailContent = file_get_contents("php://stdin");

// 解析邮件内容
list($header, $body) = explode("

", $mailContent, 2);
$headerLines = explode("
", $header);
$body = quoted_printable_decode($body);

$from = "";
$subject = "";

// 解析发件人和主题
foreach ($headerLines as $line) {
    // 获取发件人
    if (preg_match("/^From:(.*)$/", $line, $matches)) {
        $from = trim($matches[1]);
    }
    // 获取主题
    if (preg_match("/^Subject:(.*)$/", $line, $matches)) {
        $subject = trim($matches[1]);
    }
}

// 判断是否需要回复
if ($subject == "感谢您的来信") {
    // 创建一个新的邮件实例
    $mailer = new PHPMailer(true);
    
    // 配置邮件服务器信息
    $mailer->SMTPDebug = 0;
    $mailer->isSMTP();
    $mailer->Host = "smtp.example.com";
    $mailer->SMTPAuth = true;
    $mailer->Username = "your_username";
    $mailer->Password = "your_password";
    $mailer->SMTPSecure = "ssl";
    $mailer->Port = 465;
    
    // 设置发件人和收件人
    $mailer->setFrom("your_email@example.com", "Your Name");
    $mailer->addAddress($from);
    
    // 设置邮件内容
    $mailer->isHTML(true);
    $mailer->Subject = "感谢您的来信";
    $mailer->Body = "您的来信已收到，我们将尽快处理您的问题。谢谢！";
    
    // 发送邮件
    $mailer->send();
}