Question

I’m trying to get all .log and .txt files from an Ubuntu server using php 5.3.5 (WAMP). This is my third day using php … total beginner. I’m reading some doc, but trying to accomplish useful tasks along the way, as to reinforce my learning. Additionally, when I use the code below, the .txt and .log files are printed in the browser but there is no structure (hard to read). How can I print each path on a single line (not sure if it should be apart of the sub process like echo -e \n in the ssh2exec function or a line I should add to the php code? Any help is appreciated … thanks!

 <?php
 if (!function_exists("ssh2_connect")) die("function ssh2_connect doesn't exist");
 if(!($ssh = ssh2_connect('10.5.32.12', 22))) {
     echo "fail: unable to establish connection\n"; 
 } else {

     if(!ssh2_auth_password($ssh, 'root', '********')) {
        echo "fail: unable to authenticate\n";
     } else {
         echo "Okay: Logged in  ... \n";  
         $stream = ssh2_exec($ssh, 'find / -name *.log -o -name *.txt');   
         stream_set_blocking($stream, true);
         $data = '';
         while($buffer = fread($stream, 4096)) {
             $data .= $buffer;
         }
         fclose($stream);
         echo $data; // user
     }
 }
 ?>

Answer 1

In a shell, a new line is established by newline character ("\n"). In HTML, you’ll need to either use CSS to make these newlines count:

echo '<div style="white-space: pre;">';
echo htmlspecialchars($data);
echo '</div>';

or insert <br/> elements:

echo nl2br(htmlspecialchars($data));

Here is a complete example, including download links and functionality:

<?php
if (! ($ssh = ssh2_connect('10.5.32.12', 22))) {
    throw new Exception('Connection failed');
}
if (!ssh2_auth_password($ssh, 'root', '*******')) {
    throw new Exception('Authentication failed');
}
if (isset($_GET['download'])) {
    $fn = $_GET['download'];
    if (! preg_match('/^[a-zA-Z0-9 .-_\\/]+(\\.txt|\\.log)$/', $fn)) {
        throw new Exception('access denied');
    }
    header('X-Content-Type-Options: nosniff');
    header('Content-Type: text/plain');
    $sftp = ssh2_sftp($ssh);
    $url = 'ssh2.sftp://' . $sftp . $fn;
    readfile($url);
    exit();
}

$stream = ssh2_exec($ssh, 'find / -name "*.log" -o -name "*.txt"');
stream_set_blocking($stream, true);
$data = stream_get_contents($stream);
$files = explode("\n", $data);
echo '<ul>';
foreach ($files as $f) {
    if ($f == '') continue;
    $url = $_SERVER['PHP_SELF'] . '?download=' . urlencode($f);
    echo '<li><a href="' . htmlspecialchars($url) . '">';
    echo htmlspecialchars($f);
    echo '</a></li>';
}
echo '</ul>';