Execute Perl script on a remote server through SSH with PHP WebPage

Question

I need to launch a Perl script on server B from server A with a PHP WebPage through SSH.

My command looks like:

$cmd_string="ssh user@serverB 'perl path/to/script.pl param1 param2'";

I tried both inside PHP script but nothing happen:

exec(sprintf("%s > %s 2>&1 & echo $! >> %s", $cmd_string, $outputfile, $pidfile));
exec($cmd_string, $output);

Running this command through terminal works just well.

Thanks for your help

SSH connection is automatized for user "user" to server B. But in error.log I get: Could not create directory '/var/www/.ssh'. Host key verification failed. It looks as if process is ran by 'www-data' instead of 'user'?? — Lorenzow
– Lorenzow, Commented Jun 5, 2015 at 13:15
Don't you mean && just before the echo? One & would throw the command into the background and run the echo independently: I guess it would report if it could launch the first program, but not the first program's status. — kjpires
– kjpires, Commented Jun 9, 2015 at 12:47

valamorgalis · Accepted Answer · 2015-06-09 13:53:51Z

1

My recommendation - use phpseclib, a PHP SSH implementation:

<?php
include('Net/SSH2.php');

$ssh = new Net_SSH2('www.domain.tld');
if (!$ssh->login('username', 'password')) {
    exit('Login Failed');
}

echo $ssh->exec('perl path/to/script.pl param1 param2');
?>

exec() is often disabled on hosts for security reasons.

answered Jun 9, 2015 at 13:53

valamorgalis

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