Question

我正在尝试使用telnet和php进行邮件验证。整个过程在终端中说得很好，但是当我使用php shell_exec()时，它只运行到Telnet连接命令。连接telnet后，剩余的特定于telnet的命令将不再起作用。

还有其他方法需要使用php执行telnet吗？

更新：我正在尝试复制this教程。

这是我的代码

public function mailtest(Request $request){
        //Taking input email
        $email = $request->input("email");
        $divide = explode("@", $email);
        //Find out the Domain
        $server = $divide[1];
        $response = shell_exec("nslookup -q=mx $server");
        //Response of the nslookup
        print_r($response);
        $mailServerList = explode(PHP_EOL, $response);
        $line = $mailServerList[4];

        $serverArr = preg_split('/\s+/', $line);
        $n = sizeof($serverArr);
        $mailServer = $serverArr[$n-1];
        //Printing out the mail server out of the nslookup response
        print_r($mailServer);
        //Executing Telnet command
        $telnet = shell_exec("telnet $mailServer 25");
        print_r("telnet response ".$telnet);

        //Telnet Helo
        $helo = shell_exec("Helo testing.com");
        print_r("Helo response ".$helo);
        //Telnet mail from 
        $from = shell_exec('mail from: testing@gmail.com');
        print_r("MAil from response ".$from);
        //Telnet RCPT to
        $finalResponse = shell_exec("rcpt to: $email");
        print_r("Mail to response ".$finalResponse);
    }

这是回复

Server:     10.0.80.11
Address:    10.0.80.11#53

Non-authoritative answer:
gmail.com   mail exchanger = 5 gmail-smtp-in.l.google.com.
gmail.com   mail exchanger = 10 alt1.gmail-smtp-in.l.google.com.
gmail.com   mail exchanger = 40 alt4.gmail-smtp-in.l.google.com.
gmail.com   mail exchanger = 30 alt3.gmail-smtp-in.l.google.com.
gmail.com   mail exchanger = 20 alt2.gmail-smtp-in.l.google.com.

Authoritative answers can be found from:
gmail-smtp-in.l.google.com  internet address = 173.194.64.27
gmail-smtp-in.l.google.com  has AAAA address 2607:f8b0:4003:c02::1a
alt1.gmail-smtp-in.l.google.com internet address = 173.194.219.27
alt1.gmail-smtp-in.l.google.com has AAAA address 2607:f8b0:4002:c03::1b
alt4.gmail-smtp-in.l.google.com internet address = 64.233.190.26
alt4.gmail-smtp-in.l.google.com has AAAA address 2800:3f0:4003:c01::1b
alt3.gmail-smtp-in.l.google.com internet address = 74.125.141.26
alt3.gmail-smtp-in.l.google.com has AAAA address 2607:f8b0:400c:c06::1a
alt2.gmail-smtp-in.l.google.com internet address = 173.194.205.27
alt2.gmail-smtp-in.l.google.com has AAAA address 2607:f8b0:400d:c02::1b

gmail-smtp-in.l.google.com.telnet response Trying 2607:f8b0:4003:c02::1a...
Connected to gmail-smtp-in.l.google.com.
Escape character is '^]'.
Helo response 
MAil from response No message, no subject; hope that's ok
Mail to response

Answer 1

shell_exec不适合（参见Ulrich的解释）。

fsockopen应该可以解决问题。

$fp = @fsockopen('yourMailServer.com', 9001);      

if ($fp) { 
    fwrite($fp, "username\n");
    fwrite($fp, "password\n");

    while ($line = fread($fp, 2048)) {    
       // do things with $line    
    }    
} else {    
    //return error    
}

Answer 2

从@Lavi的回答中得到一些参考后，这就是我设法解决问题的方法。 fputs做了诀窍，而不是fwrite

$connect = @fsockopen($mailServer, 25);
if($connect){
    fputs ($connect , "HELO $mailServer\r\n");
    $out = fgets ($connect, 1024);
    $details .= $out."\n";

    fputs ($connect , "MAIL FROM: <$fromemail>\r\n");
    //$from = fgets ($connect, 1024);
    fputs ($connect , "RCPT TO: <$toemail>\r\n");
    //$to = fgets ($connect, 1024);
    fputs ($connect , "QUIT");
    fclose($connect);
}

Answer 3

shell_exec()开始一个新流程。它首先启动一个shell，然后作为命令执行给定的字符串。您不能使用多个shell_exec()命令与同一个shell进行交互，例如远程控制终端。

在您的情况下，我要做的是尝试构建现有代码。例如，有一堆现有的PHP SMTP libraries。我非常确定至少其中一个能够做你想做的事情，或者至少向你展示一种可以实现缺失功能的方法。

如果您真的坚持要自己动手，请查看现有答案，例如： interacting with command line program或PHP＆＃39; expect module。除非绝对需要，否则我会避免这种情况，因为它效率低下。此外，出于安全原因，Web服务器通常配置为禁止启动新进程，因此如果您的代码在从命令行运行而不是在Web服务器内部运行时，请记住这一点。

无法使用PHP执行telnet命令shell_exec（）

3 个答案: