Passing data between themes and the page settings

Question

I'm designing a small CMS with best practices I learned. I came to this conclusion when comes to including page content and themes to each page depending by user or whatever.

But how could I make this better? I can change title of included modules this way, but I cannot modify titles if the included modules have another included sub modules.

My main question would be how should I rather handle the themes. But I would also like some criticism about the actual CMS design. Any flaws, security issues or anything that could be much better.

Index page from where I include all 'modules':

<?php
 error_reporting(-1);
 define('CMS_TOKEN', '');
 include('config/config.inc.php');
 $cms = new cms();
 if(($_SERVER['REQUEST_METHOD'] === 'GET' || $_SERVER['REQUEST_METHOD'] === 'POST') && !empty($_GET['page'])) {
 $cms->IncludeModule($_GET['page']);
 }
 else {
 foreach($cms->GetModuleList() as $module) {
 $cms->ConcatContent('<a href="index.php?page='.$module.'">'.$module.'</a><br />');
 }
 }
 include($cms->GetTheme() . "/head.php");
 echo $cms->GetContent();
 include($cms->GetTheme() . "/foot.php");
?>

Example module.

<?php
 $module_name = 'User Panel';
 $module_directory = 'user';
 $this->SetPageName($module_name); 
 if(!defined('CMS_TOKEN')) {
 header('Location: index.php');
 }
 else {
 if(isset($_SESSION['user']) && $_SESSION['user']['username'] != 'anonymous') {
 $this->ConcatContent("<h2>$module_name</h2>");
 if(isset($_GET['edit'])) {
 $edit = $_GET['edit'];
 foreach($this->GetCustomModuleList($module_directory) as $module) {
 $this->ConcatContent("<a href=\"index.php?page=user&edit=$module\"> $module </a> | ");
 } 
 $this->ConcatContent("<br /><br />"); 
 if(in_array($module, $this->GetCustomModuleList('user'))) {
 include($this->GetModuleDirectory() . '/' . $module_directory . '/' . $edit . $this->GetModuleExtention());
 }
 else {
 $this->ConcatContent("Selected module doesn't exist!");
 }
 }
 else {
 foreach($this->GetCustomModuleList($module_directory) as $module) {
 $this->ConcatContent("<a href=\"index.php?page=user&edit=$module\">$module</a> | ");
 }
 }
 }
 else {
 header('Location: index.php?page=login');
 }
 }
?>

Some core CMS code:

<?php
 class cms { 
 // lots of variables
 // custom modules config variables - will always change
 private $config_custom_module_list;
 private $config_custom_module_directory;
 function __construct() { /* ... */ }
 // lots of getter/setters 
 public function GetModuleList() {
 $moduleList = array();
 foreach($this->config_module_list as $module) {
 if($this->CheckModule($module) == 1) { // 1 for pure module result
 $moduleNoExt = str_replace($this->GetModuleExtention(), '', $module);
 $moduleList[] = str_replace($this->GetModuleExtention(), '', $moduleNoExt);
 }
 }
 return $moduleList;
 }
 private function SetModuleList() {
 $this->config_module_list = array_diff(scandir($this->GetModuleDirectory(), 1), array('..', '.'));
 } 
 private function SetCustomModuleList($owner) {
 if($this->CheckCustomModuleDirectory($owner)) {
 $this->config_custom_module_list = array_diff(scandir($this->GetModuleDirectory() . '/' . $owner, 1), array('..', '.'));
 return true;
 }
 return false;
 }
 private function CheckModule($module) {
 $moduleNameArray = explode(".", $module);
 $countParts = count($moduleNameArray);
 if($countParts == 1) {
 return 2;
 }
 else if($countParts == 3) {
 $moduleNameExtention = '.' . $moduleNameArray[1] . '.' . $moduleNameArray[2];
 if($this->GetModuleExtention() == $moduleNameExtention) {
 return 1;
 }
 }
 return 0;
 } 
 public function IncludeModule($name) {
 if(in_array($name, $this->GetModuleList())) { 
 include($this->GetModuleDirectory() . '/' . $name . $this->GetModuleExtention());
 }
 else {
 echo 'Module Doesn\'t Exist! Critical Error!';
 }
 }
 }
?>

Answer 1

I found easy solution. Just control the title from the end of the script like this:

<?php
 $module_name = 'User Panel';
 $module_directory = 'user';
 if(!defined('CMS_TOKEN')) {
 header('Location: index.php');
 }
 else {
 if(isset($_SESSION['user']) && $_SESSION['user']['username'] != 'anonymous') {
 $this->ConcatContent("<h2>$module_name</h2>");
 if(isset($_GET['edit'])) {
 $edit = $_GET['edit'];
 foreach($this->GetCustomModuleList($module_directory) as $module) {
 $this->ConcatContent("<a href=\"index.php?page=user&edit=$module\"> $module </a> | ");
 } 
 $this->ConcatContent("<br /><br />"); 
 $module_name = 'SOME TITLE'; // ---- here
 if(in_array($module, $this->GetCustomModuleList('user'))) {
 include($this->GetModuleDirectory() . '/' . $module_directory . '/' . $edit . $this->GetModuleExtention());
 }
 else {
 $this->ConcatContent("Selected module doesn't exist!");
 }
 }
 else {
 foreach($this->GetCustomModuleList($module_directory) as $module) {
 $this->ConcatContent("<a href=\"index.php?page=user&edit=$module\">$module</a> | ");
 }
 }
 }
 else {
 header('Location: index.php?page=login');
 }
 }
 $this->SetPageName($module_name); 
?>