validate_admin.php

<?php 
// --------------------------------------------------------- 
// block_cmanager is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// block_cmanager 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
//
// COURSE REQUEST MANAGER BLOCK FOR MOODLE
// by Kyle Goslin & Daniel McSweeney
// Copyright 2012-2014 - Institute of Technology Blanchardstown.
// --------------------------------------------------------- 
/**
 * COURSE REQUEST MANAGER
  *
 * @package    block_cmanager
 * @copyright  2012-2018 Kyle Goslin, Daniel McSweeney
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
require_login();
global $USER;
global $CFG;


if ($admins = get_admins()) { 
    $loginIsValid = False;
    foreach ($admins as $admin) {
     
        if ($admin->id == $USER->id) {
		    $loginIsValid = True;
              
		  
		}
		 
	}
	
	if ($loginIsValid != True) {
	    echo "<script>window.location = '".$CFG->wwwroot."';</script>";
        die;
	}
	
}