luos/workflow/engine/methods/setup/pluginsImport.php

<?php
/**
 * pluginsImport.php
 *
 * ProcessMaker Open Source Edition
 * Copyright (C) 2004 - 2008 Colosa Inc.23
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, contact Colosa Inc, 2566 Le Jeune Rd.,
 * Coral Gables, FL, 33134, USA, or email info@colosa.com.
 */
global $RBAC;

use ProcessMaker\Plugins\PluginRegistry;

$access = $RBAC->userCanAccess( 'PM_SETUP_ADVANCE' );
if ($access != 1) {
    switch ($access) {
        case - 1:
            G::SendTemporalMessage( 'ID_USER_HAVENT_RIGHTS_PAGE', 'error', 'labels' );
            G::header( 'location: ../login/login' );
            die();
            break;
        case - 2:
            G::SendTemporalMessage( 'ID_USER_HAVENT_RIGHTS_SYSTEM', 'error', 'labels' );
            G::header( 'location: ../login/login' );
            die();
            break;
        default:
            G::SendTemporalMessage( 'ID_USER_HAVENT_RIGHTS_PAGE', 'error', 'labels' );
            G::header( 'location: ../login/login' );
            die();
            break;
    }
}

$oPluginRegistry = PluginRegistry::loadSingleton();
$G_MAIN_MENU = 'processmaker';
$G_ID_MENU_SELECTED = 'SETUP';
$G_SUB_MENU = 'setup';
$G_ID_SUB_MENU_SELECTED = 'PLUGINS';

//calculating the max upload file size;
$POST_MAX_SIZE = ini_get( 'post_max_size' );
$mul = substr( $POST_MAX_SIZE, - 1 );
$mul = ($mul == 'M' ? 1048576 : ($mul == 'K' ? 1024 : ($mul == 'G' ? 1073741824 : 1)));
$postMaxSize = (int) $POST_MAX_SIZE * $mul;

$UPLOAD_MAX_SIZE = ini_get( 'upload_max_filesize' );
$mul = substr( $UPLOAD_MAX_SIZE, - 1 );
$mul = ($mul == 'M' ? 1048576 : ($mul == 'K' ? 1024 : ($mul == 'G' ? 1073741824 : 1)));
$uploadMaxSize = (int) $UPLOAD_MAX_SIZE * $mul;

if ($postMaxSize < $uploadMaxSize)
    $uploadMaxSize = $postMaxSize;
$Fields['MAX_FILE_SIZE'] = $uploadMaxSize . " (" . $UPLOAD_MAX_SIZE . ") ";

$G_PUBLISH = new Publisher();
try {
    $G_PUBLISH->AddContent( 'xmlform', 'xmlform', 'setup/pluginImport', '', $Fields, 'pluginsImportFile' );
} catch (Exception $e) {
    $aMessage['MESSAGE'] = $e->getMessage();
    $G_PUBLISH->AddContent( 'xmlform', 'xmlform', 'login/showMessage', '', $aMessage );
}
G::RenderPage( 'publishBlank', 'blank' );