(PHP Extension) SSH Parallel Remote Commands on Single Server

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Shows how to execute multiple commands in parallel on a single SSH server and retrieve the command output for each.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$ssh = new CkSsh();

$port = 22;
$success = $ssh->Connect('the-ssh-server.com',$port);
if ($success != true) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

// Authenticate using login/password:
$success = $ssh->AuthenticatePw('theSshLogin','theSshPassword');
if ($success != true) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

// Start several commands on the server.
$channel1 = $ssh->QuickCmdSend('df');
if ($channel1 < 0) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

$channel2 = $ssh->QuickCmdSend('date');
if ($channel2 < 0) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

$channel3 = $ssh->QuickCmdSend('echo hello world');
if ($channel3 < 0) {
    print $ssh->lastErrorText() . "\n";
    exit;
}

// Now collect the results of each command.
$pollTimeoutMs = 50;
$numFinished = 0;
while ($numFinished < 3) {
    // Check to see if anything has finished.
    // QuickCmdCheck returns -1 if there are no errors and nothing else finished
    // QuickCmdCheck returns -2 if there was an error (such as a lost connection)
    // QuickCmdCheck returns a channel number if a channel finished.
    $channel = $ssh->QuickCmdCheck($pollTimeoutMs);
    if ($channel == -2) {
        print $ssh->lastErrorText() . "\n";
        exit;
    }

    if ($channel >= 0) {
        print '---- channel ' . $channel . ' finished ----' . "\n";
        print $ssh->getReceivedText($channel,'ansi') . "\n";
        $numFinished = $numFinished + 1;
    }

}

// --------------
// Sample output:

// 	---- channel 105 finished ----
// 	hello world
// 
// 	---- channel 104 finished ----
// 	Thu Dec 22 17:43:58 CST 2016
// 
// 	---- channel 103 finished ----
// 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
// 	/dev/disk2    2176716032 265739728 1910464304    13% 33281464 238808038   12%   /
// 	devfs                382       382          0   100%      662         0  100%   /dev
// 	map -hosts             0         0          0   100%        0         0  100%   /net
// 	map auto_home          0         0          0   100%        0         0  100%   /home
// 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome

?>