How To Execute SSH Commands Via PHP

I would use phpseclib, a pure PHP SSH implementation. An example:

<?phpinclude('Net/SSH2.php');$ssh = new Net_SSH2('www.domain.tld');if (!$ssh->login('username', 'password')) {    exit('Login Failed');}echo $ssh->exec('pwd');echo $ssh->exec('ls -la');?>

Do you have the SSH2 extension available?

Docs: http://www.php.net/manual/en/function.ssh2-exec.php

$connection = ssh2_connect('shell.example.com', 22);ssh2_auth_password($connection, 'username', 'password');$stream = ssh2_exec($connection, '/usr/local/bin/php -i');

I've had a hard time with ssh2 in php mostly because the output stream sometimes works and sometimes it doesn't. I'm just gonna paste my lib here which works for me very well. If there are small inconsistencies in code it's because I have it plugged in a framework but you should be fine porting it:

<?phpclass Components_Ssh {    private $host;    private $user;    private $pass;    private $port;    private $conn = false;    private $error;    private $stream;    private $stream_timeout = 100;    private $log;    private $lastLog;    public function __construct ( $host, $user, $pass, $port, $serverLog ) {        $this->host = $host;        $this->user = $user;        $this->pass = $pass;        $this->port = $port;        $this->sLog = $serverLog;        if ( $this->connect ()->authenticate () ) {            return true;        }    }    public function isConnected () {        return ( boolean ) $this->conn;    }    public function __get ( $name ) {        return $this->$name;    }    public function connect () {        $this->logAction ( "Connecting to {$this->host}" );        if ( $this->conn = ssh2_connect ( $this->host, $this->port ) ) {            return $this;        }        $this->logAction ( "Connection to {$this->host} failed" );        throw new Exception ( "Unable to connect to {$this->host}" );    }    public function authenticate () {        $this->logAction ( "Authenticating to {$this->host}" );        if ( ssh2_auth_password ( $this->conn, $this->user, $this->pass ) ) {            return $this;        }        $this->logAction ( "Authentication to {$this->host} failed" );        throw new Exception ( "Unable to authenticate to {$this->host}" );    }    public function sendFile ( $localFile, $remoteFile, $permision = 0644 ) {        if ( ! is_file ( $localFile ) ) throw new Exception ( "Local file {$localFile} does not exist" );        $this->logAction ( "Sending file $localFile as $remoteFile" );        $sftp = ssh2_sftp ( $this->conn );        $sftpStream = @fopen ( 'ssh2.sftp://' . $sftp . $remoteFile, 'w' );        if ( ! $sftpStream ) {            //  if 1 method failes try the other one            if ( ! @ssh2_scp_send ( $this->conn, $localFile, $remoteFile, $permision ) ) {                throw new Exception ( "Could not open remote file: $remoteFile" );            }            else {                return true;            }        }        $data_to_send = @file_get_contents ( $localFile );        if ( @fwrite ( $sftpStream, $data_to_send ) === false ) {            throw new Exception ( "Could not send data from file: $localFile." );        }        fclose ( $sftpStream );        $this->logAction ( "Sending file $localFile as $remoteFile succeeded" );        return true;    }    public function getFile ( $remoteFile, $localFile ) {        $this->logAction ( "Receiving file $remoteFile as $localFile" );        if ( ssh2_scp_recv ( $this->conn, $remoteFile, $localFile ) ) {            return true;        }        $this->logAction ( "Receiving file $remoteFile as $localFile failed" );        throw new Exception ( "Unable to get file to {$remoteFile}" );    }    public function cmd ( $cmd, $returnOutput = false ) {        $this->logAction ( "Executing command $cmd" );        $this->stream = ssh2_exec ( $this->conn, $cmd );        if ( FALSE === $this->stream ) {            $this->logAction ( "Unable to execute command $cmd" );            throw new Exception ( "Unable to execute command '$cmd'" );        }        $this->logAction ( "$cmd was executed" );        stream_set_blocking ( $this->stream, true );        stream_set_timeout ( $this->stream, $this->stream_timeout );        $this->lastLog = stream_get_contents ( $this->stream );        $this->logAction ( "$cmd output: {$this->lastLog}" );        fclose ( $this->stream );        $this->log .= $this->lastLog . "\n";        return ( $returnOutput ) ? $this->lastLog : $this;    }    public function shellCmd ( $cmds = array () ) {        $this->logAction ( "Openning ssh2 shell" );        $this->shellStream = ssh2_shell ( $this->conn );        sleep ( 1 );        $out = '';        while ( $line = fgets ( $this->shellStream ) ) {            $out .= $line;        }        $this->logAction ( "ssh2 shell output: $out" );        foreach ( $cmds as $cmd ) {            $out = '';            $this->logAction ( "Writing ssh2 shell command: $cmd" );            fwrite ( $this->shellStream, "$cmd" . PHP_EOL );            sleep ( 1 );            while ( $line = fgets ( $this->shellStream ) ) {                $out .= $line;                sleep ( 1 );            }            $this->logAction ( "ssh2 shell command $cmd output: $out" );        }        $this->logAction ( "Closing shell stream" );        fclose ( $this->shellStream );    }    public function getLastOutput () {        return $this->lastLog;    }    public function getOutput () {        return $this->log;    }    public function disconnect () {        $this->logAction ( "Disconnecting from {$this->host}" );        // if disconnect function is available call it..        if ( function_exists ( 'ssh2_disconnect' ) ) {            ssh2_disconnect ( $this->conn );        }        else { // if no disconnect func is available, close conn, unset var            @fclose ( $this->conn );            $this->conn = false;        }        // return null always        return NULL;    }    public function fileExists ( $path ) {        $output = $this->cmd ( "[ -f $path ] && echo 1 || echo 0", true );        return ( bool ) trim ( $output );    }}