Why commands with ssh2_exec do not end?

问题:

I have a problem running a command on my server remotely with ssh2_exec.

When I use wget or unzip, the command should execute but I get no result or only a few files.

What I need to know is how I can be sure that my ssh2_exec script will execute fully before proceeding to the rest of my PHP code.

$stream =ssh2_exec($connection, 'cd /home; wget http://domain.com/myfile.zip; unzip myfile.zip; rm myfile.zip');

Thanks in advance!

EDIT : I have found script, how get result of commands ?

<?php 
$ip = 'ip_address'; 
$user = 'username'; 
$pass = 'password'; 

$connection = ssh2_connect($ip); 
ssh2_auth_password($connection,$user,$pass); 
$shell = ssh2_shell($connection,"bash"); 

//Trick is in the start and end echos which can be executed in both *nix and windows systems. 
//Do add 'cmd /C' to the start of $cmd if on a windows system. 
$cmd = "echo '[start]';your commands here;echo '[end]'"; 
$output = user_exec($shell,$cmd); 

fclose($shell); 

function user_exec($shell,$cmd) { 
  fwrite($shell,$cmd . "\n"); 
  $output = ""; 
  $start = false; 
  $start_time = time(); 
  $max_time = 2; //time in seconds 
  while(((time()-$start_time) < $max_time)) { 
    $line = fgets($shell); 
    if(!strstr($line,$cmd)) { 
      if(preg_match('/\[start\]/',$line)) { 
        $start = true; 
      }elseif(preg_match('/\[end\]/',$line)) { 
        return $output; 
      }elseif($start){ 
        $output[] = $line; 
      } 
    } 
  } 
} 

?>

回答1:

Debian might think the package is good, because it's very stable(according to the official site there were no changes since 2012-10-15). But I'll say it's not good. I'd use the following approach:

$command = "ls -l";
$user = "user";
$host = "host";

if (! my_ssh_exec($command, $user, $host)) {
  fprintf(STDERR, "my_ssh_exec failed\n");
}


function my_ssh_exec($cmd, $host, $user) {
  $result = true;

  $desc = [
    1 => ['pipe', 'w'],
    2 => ['pipe', 'w'],
  ];

  // -tt forces TTY allocation
  $ssh_cmd = "ssh -tt $user@$host -- $cmd";

  $proc = proc_open($cmd, $desc, $pipes);

  if (! is_resource($proc)) {
    return false;
  }

  if ($error = stream_get_contents($pipes[2])) {
    fprintf(STDERR, "Error: %s\n", $error);
    $result = false;
  }
  fclose($pipes[2]);

  if ($output = stream_get_contents($pipes[1])) {
    printf("Output: %s\n", $output);
  }
  fclose($pipes[1]);

  if ($exit_status = proc_close($proc)) {
    fprintf(STDERR, "Command exited with non-zero status %d: %s\n",
      $exit_status, $cmd);
    $result = false;
  }

  return $result;
}

The script is supposed to run in command line interface.