Exec返回空白数组

Question

I've seen more than a few questions on this whilst searching, but none with a working answer, just recommendations of other things to try

$server = "IPADDRESS";
$username = "USER";
$port = "22";
$ftpuser = "FTPUSER"
$ftppass = "FTPPASS"

$command = "/usr/local/psa/bin/subscription --create " . $domain . " -owner admin -service-plan 'Default Domain' -ip " . $server . " -login " . $ftpuser . " -passwd '" . $ftppass . "'";
$cmd_string = "ssh -p ".$port." ".$username."@".$server." ".$command;
exec($cmd_string, $output);
echo $command;
echo $output;

Using uptime as a command works fine, and taking the exact output of the $command and manually pasting it also works fine with a usual output of SUCCESS: Creation of domain DOMAIN completed - However when running this, it simply outputs 'Array', with no contents. Am I missing something?

Answer 1

PHP manual' page about exec is clear about it :

If the output argument is present, then the specified array will be filled with every line of output from the command. Trailing whitespace, such as , is not included in this array. Note that if the array already contains some elements, exec() will append to the end of the array. If you do not want the function to append elements, call unset() on the array before passing it to exec().

It returns an array filled with each lines of the exec call.

So in your case, you should use :

echo $output[0]; // The first and only line