PHP处理postfix的邮件内容

<?php

#从输入读取到所有的邮件内容
$email = "";
$fd = fopen("php://stdin", "r");
while (!feof($fd)) {
  $email .= fread($fd, 1024);
}
fclose($fd);

#记录所有的内容，测试
file_put_contents("/tmp/mail/".time(), $email);

#处理邮件
$lines = explode("\n", $email);

// empty vars
$from = "";
$date = "";
$subject = "";
$message = "";
$splittingheaders = true;

for ($i=0; $i<count($lines); $i++) {
  if ($splittingheaders) {

    // look out for special headers
    if (preg_match("/^Subject: (.*)/", $lines[$i], $matches)) {
      $subject = $matches[1];
    }
    if (preg_match("/^From: (.*)/", $lines[$i], $matches)) {
      if(strpos($lines[$i],"<")){
        //the name exist too in from header
        $data = explode('<',$lines[$i]);
        $from = substr(trim($data[1]),0,-1);
      }else{
        //only the mail
        $from = $matches[1];
      }
    }
    if (preg_match("/^Date: (.*)/", $lines[$i], $matches)) {
      $date = $matches[1];
    }
  } else {
    // not a header, but message
    $message .= $lines[$i]."\n";
  }

  if (trim($lines[$i])=="") {
    // empty line, header section has ended
    $splittingheaders = false;
  }
}

$when = date("Y-m-d G:i:s");
$data = explode('@',$from);
$username = $data[0];

#记录到数据库
$sql = "insert into mails ( `username`, `from`, `subject`, `date`, `message`) values ( '$username', '$from', '$subject', '$when', '$message')";

#测试
file_put_contents("/tmp/mail2.log", $sql);
?>