Question

我正在尝试从远程服务器的输出流写入文件（file.txt）。输出流的内容是从远程服务器上的bash / expect脚本生成的。我不确定fwrite()是如何工作的，然而，当我回显fget()时，我可以看到脚本的整个输出。

有人知道fwrite()是否只写出输出流的前几行？或者什么时候停止写作？我尝试使用while循环来连续写入但我只看到file.txt while($line = fgets($stream_out)) {fwrite($fopenText, $line);}中的前几行。但是，当我回显fget()时，我可以看到网页上的整个输出流，我需要将完整的输出写入我的file.txt，但这并没有。

我该如何做到这一点？

$gwUser = 'user';
$gwPwd = 'pwd';
$pathToScript1 = '/home/user/up.sh';
$pathToScript2 = '/home/user/down.sh';

if ($connection = @ssh2_connect($gateway, 22)) {
    ssh2_auth_password($connection, $gwUser, $gwPwd);            
    if(isset($_POST['option']) && $_POST['option'] == 1) { 
        $stream = ssh2_exec($connection, $pathToScript1);
        stream_set_blocking($stream, true);
        $stream_out = ssh2_fetch_stream($stream, SSH2_STREAM_STDIO);
        $stream_err = ssh2_fetch_stream($stream, SSH2_STREAM_STDERR);

        $path = $_SERVER['DOCUMENT_ROOT'] . "/my/path/file.txt";
        touch($path);
        chmod($path, 0777);
        $fopenText = fopen($path, "w");
        while($line = fgets($stream_out)) {fwrite($fopenText, $line);} //this doesn't give me the full output stream
        echo '<pre>' . "------------------------\n" . '</pre>';
        while($line = fgets($stream_err)) {flush(); echo '<pre>' . $line . '</pre>';}
        fclose($stream);
        fclose($fopenText);
    }

    //I can get the the output stream this way, but this is not what i want.
    if(isset($_POST['option'])  && $_POST['option'] == 2) { 

        $stream = ssh2_exec($connection, "$pathToScript2");
        stream_set_blocking($stream, true);
        $stream_out = ssh2_fetch_stream($stream, SSH2_STREAM_STDIO);
        $stream_err = ssh2_fetch_stream($stream, SSH2_STREAM_STDERR);
        while($line = fgets($stream_out)) {flush(); echo '<pre>' . $line . '</pre>';}
        echo '<pre>' . "------------------------\n" . '</pre>';
        while($line = fgets($stream_err)) {flush(); echo '<pre>' . $line . '</pre>';}
        fclose($stream);                
    }
}

file.txt输出：

[root@psat main]# cat file.txt
cd /home/user/
My current directory is:/home/user
./myExpectScript.sh

期望的file.txt输出（我从$_POST['option'] == 2回复得到的信息）：

cd /home/user/
My current directory is:/home/user/
./myExpectScript.sh
spawn /bin/bash
[user@gateway user]$ spawn /bin/bash
[user@gateway user]$ ./hexMsg -o 3 20000 0 0 0
??
[user@gateway user]$ /usr/local/bin/ssh " @ "
...
...
(omitted for simplicity)

Answer 1

听起来好像没有返回SSH连接，因此fwrite()循环尚未完成且文件未关闭。结果，一些输出可以被缓冲。每次写入后尝试刷新缓冲区：

    while($line = fgets($stream_out)) {
        fwrite($fopenText, $line);
        fflush($fopenText);
    }

PHP从输出流写入文件只写入前几行

1 个答案: