variable end bug?

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

class Admin extends MX_Controller
{

/*****************************************************
 * Perfect controller methods
 *****************************************************/
    function __construct() {
        parent::__construct();

        $this->load->helper('url');
        $this->load->helper('form');
        $this->load->library('form_validation');
        $this->load->model('admin_mdl');
        $this->load->model('media/media_mdl');
        $this->load->model('pathways/pathways_mdl');
        $this->load->model('classes/classes_mdl');
        $this->load->model('parts/parts_mdl');
        $this->load->model('lessons/lessons_mdl');
    }

    function get($order_by){
        $this->load->model('mdl_perfectcontroller');
        $query = $this->mdl_perfectcontroller->get($order_by);
        return $query;
     }

    function get_with_limit($limit, $offset, $order_by) {
        $this->load->model('mdl_perfectcontroller');
        $query = $this->mdl_perfectcontroller->get_with_limit($limit, $offset, $order_by);
        return $query;
     }

    function get_where($id){
        $this->load->model('mdl_perfectcontroller');
        $query = $this->mdl_perfectcontroller->get_where($id);
        return $query;
     }

    function get_where_custom($col, $value) {
        $this->load->model('mdl_perfectcontroller');
        $query = $this->mdl_perfectcontroller->get_where_custom($col, $value);
        return $query;
     }

    function _insert($data){
        $this->load->model('mdl_perfectcontroller');
        $this->mdl_perfectcontroller->_insert($data);
     }

    function _update($id, $data){
        $this->load->model('mdl_perfectcontroller');
        $this->mdl_perfectcontroller->_update($id, $data);
     }

    function _delete($id){
        $this->load->model('mdl_perfectcontroller');
        $this->mdl_perfectcontroller->_delete($id);
     }

    function count_where($column, $value) {
        $this->load->model('mdl_perfectcontroller');
        $count = $this->mdl_perfectcontroller->count_where($column, $value);
        return $count;
     }

    function get_max() {
        $this->load->model('mdl_perfectcontroller');
        $max_id = $this->mdl_perfectcontroller->get_max();
        return $max_id;
     }

    function _custom_query($mysql_query) {
        $this->load->model('mdl_perfectcontroller');
        $query = $this->mdl_perfectcontroller->_custom_query($mysql_query);
        return $query;
     }


/*****************************************************
 * Miscellaneous methods
 *****************************************************/
    //Get all pathways records names.
    function get_pathways_name() {
        $data = array('vdata_pathways' => $this->pathways_mdl->get_pathways_name());
        return $data;
     }

    //Get all classes records names WHERE pathid.
    function get_classes_name_pathid($pathwayid) {
        $data = array('vdata_classes' => $this->classes_mdl->get_classes_name_pathid($pathwayid));
        return $data;
     }

    //Get all classes records names WHERE pathid.
    function get_parts_name_classid($classid) {
        $data = array('vdata_parts' => $this->parts_mdl->get_parts_name_classid($classid));
        return $data;
     }

    //Get all classes records names WHERE pathid.
    function get_lessons_name_partid($partid) {
        $data = array('vdata_lessons' => $this->lessons_mdl->get_lessons_name_partid($partid));
        return $data;
     }

    //Get pathways records and display Admin Control Panel
    function cp() {
        $data_pathways = $this->get_pathways_name();
        $this->load->view('cpanel', $data_pathways);
    }

    function cp_proc() {
        //PATHWAYS
        //If pathways record is clicked.
        //Submit/Reload the page.
        //Capture Pathwayid
        //Get pathways records and store into array.
        //Get classid, nameclass related to pathwayid.
        //If record(s) exist store pathwayid into session.
        //Else empty pathwayid from session.
        //Fetch pathwayid from session
        //Combine arrays.
        //Display pathways records and classes records related to pathwayid

        //Capture Pathwayid
        $recordid = $this->uri->segment(3, 0);
        $division = $this->uri->segment(4, 0);

        //Get pathways records and store into array.
        $data_pathways  = $this->get_pathways_name();

        //Initialize variable arrays
        $data_classes   = array('' => '');
        $data_parts     = array('' => '');
        $data_lessons   = array('' => '');

        if($division == 'path') {
            //Store pathid into session
            $this->session->set_userdata('pathwayid', $recordid);

            //Fetch pathwayid from session
            $pathwayid = $this->session->userdata('pathwayid');

            //Get classes records related to pathwayid and store into array.
            $data_classes = $this->get_classes_name_pathid($pathwayid);

            //If record(s) exist delete partid, lessonid from session
                $this->session->set_userdata('partid', '');
                $this->session->set_userdata('lessonid', '');
                $data_part = array();
                $data_lessons = array();

            if($data_classes != FALSE) {
                $this->session->set_userdata('partid', '');
                $this->session->set_userdata('lessonid', '');
                $data_part = array();
                $data_lessons = array();
                $this->jaz_print_r($data_classes);
            } elseif($data_classes == FALSE) {
            //Else empty pathwayid from session.
                $this->jaz_print_r($data_classes);
            }
        } elseif ($division == 'class') {
            //CLASS division
            //Fetch pathwayid from session
            $pathwayid = $this->session->userdata('pathwayid');
            //Get classes records related to pathwayid and store into array.
            $data_classes = $this->get_classes_name_pathid($pathwayid);

            //PARTS division
            //Store classid into session
            $this->session->set_userdata('classid', $recordid);
            //Fetch classid from session
            $classid = $this->session->userdata('classid');
            //Get parts records related to classid and store into array.
            $data_parts = $this->get_parts_name_classid($classid);

            //If record(s) exist delete lessonid from session
            if($data_parts != FALSE) {
                $this->session->set_userdata('lessonid', '');
                $data_lessons = array();
            } else {
            //Else empty classid from session.
                //$this->session->set_userdata('classid', '');
            }
        } elseif ($division == 'part') {
            //CLASS division
            //Fetch pathwayid from session
            $pathwayid = $this->session->userdata('pathwayid');
            //Get classes records related to pathwayid and store into array.
            $data_classes = $this->get_classes_name_pathid($pathwayid);

            //PARTS division
            //Fetch classid from session
            $classid = $this->session->userdata('classid');
            //Get parts records related to classid and store into array.
            $data_parts = $this->get_parts_name_classid($classid);

            //LESSONS division
            //Store partid into session
            $this->session->set_userdata('partid', $recordid);
            //Fetch partid from session
            $partid = $this->session->userdata('partid');
            //Get lessons records related to partid and store into array.
            $data_lessons = $this->get_lessons_name_partid($partid);

            //If record(s) exist store partid into session.
            if($data_lessons != FALSE) {
                //do nothing
            } else {
            //Else empty classid from session.
                //$this->session->set_userdata('classid', '');
            }
        } elseif ($division == 'none') {
            //echo '<h3>No division is selected!</h3>';

            //Fetch pathwayid from session
            //Get classes records related to pathwayid and store into array.
            $pathwayid = $this->session->userdata('pathwayid');
            if($pathwayid != '') {
                $data_classes = $this->get_classes_name_pathid($pathwayid);
            }

            //Fetch classid from session
            //Get parts records related to classid and store into array.
            $classid = $this->session->userdata('classid');
            if($classid != '') {
                $data_parts = $this->get_parts_name_classid($classid);
            }

            //Fetch partid from session
            //Get lessons records related to partid and store into array.
            $partid = $this->session->userdata('partid');
            if($partid != '') {
                $data_lessons = $this->get_lessons_name_partid($partid);
            }
        }

        //Combine arrays.
        $data = array_merge((array)$data_pathways, (array)$data_classes, (array)$data_parts, (array)$data_lessons);

        //Display merged records
        $this->load->view('cpanel', $data);
    }

    function add_pathways() {
        //store into session
        $this->session->set_userdata('action', 'add');
        $this->load->view('pathways/addpathways_form');
    }

    function edit_pathways() {
        //catch pathwaysid
        $pathwayid = $this->uri->segment(3, 0);

        //store into session
        $this->session->set_userdata('rec_id', $pathwayid);
        $this->session->set_userdata('action', 'edit');

        //Get record related to pathwayid
        $data = $this->pathways_mdl->get_record_by_id($pathwayid);

        //Convert array into single dimensional array.
        $data_flat = $this->array_flatten($data);

        //$this->jaz_print_r($data_flat);
        $this->load->view('pathways/addpathways_form', $data_flat);
    }

    function add_classes() {
        //store into session
        $this->session->set_userdata('action', 'add');
        echo Modules::run('classes/addclasses');
    }

    function edit_classes() {
        //catch classsid
        $classid = $this->uri->segment(3, 0);

        //store into session
        $this->session->set_userdata('rec_id', $classid);
        $this->session->set_userdata('action', 'edit');

        //Get record related to classid
        $data_class     = $this->classes_mdl->get_record_by_id($classid);
        //$data_pathway     = array('vdata' => $this->pathways_mdl->get_pathways_name());

        //convert multi-dimentional array into single array.
        $data_class = $this->array_flatten($data_class);

        //get record by pathwayid
        $data_pathway = $this->pathways_mdl->get_record_by_id($data_class['pathwayid']);
        $data_pathway = $this->array_flatten($data_pathway);

        //Create new index in class array and assign 'namepathway'.
        $data_class['namepathway'] = $data_pathway['namepathway'];

        $this->load->view('classes/addclasses_form', $data_class);
    }

    function add_parts() {
        //store into session
        $this->session->set_userdata('action', 'add');
        echo Modules::run('parts/addparts');
    }

    function edit_parts() {
        //catch classsid
        $partid = $this->uri->segment(3, 0);

        //store into session
        $this->session->set_userdata('rec_id', $partid);
        $this->session->set_userdata('action', 'edit');

        //Get record related to classid
        $data_part  = $this->parts_mdl->get_record_by_id($partid);

        //convert multi-dimentional array into single array.
        $data_part = $this->array_flatten($data_part);

        //get parent record by classid
        $data_class = $this->classes_mdl->get_record_by_id($data_part['classid']);
        $data_class = $this->array_flatten($data_class);

        //Create new index in part array and assign 'namepart'.
        $data_part['nameclass'] = $data_class['nameclass'];
        $this->load->view('parts/addparts_form', $data_part);

        /*
        echo 'Class:';
        $this->jaz_print_r($data_class);
        echo 'Part:';
        $this->jaz_print_r($data_part);
        */
    }

    function add_lessons() {
        //store into session
        $this->session->set_userdata('action', 'add');
        echo Modules::run('lessons/addlesson');
    }

    function edit_lessons() {
        //catch classsid
        $lessonid = $this->uri->segment(3, 0);

        //store into session
        $this->session->set_userdata('rec_id', $lessonid);
        $this->session->set_userdata('action', 'edit');

        //Get lesson record related to classid
        $data_lesson = $this->lessons_mdl->get_record_by_id($lessonid);
        $data_lesson = $this->array_flatten($data_lesson);

        //Get media record related to lessonid
        $data_media = $this->media_mdl->get_record_by_id($lessonid);
        $data_media = $this->array_flatten($data_media);

        //get parent part record by partid
        $data_part = $this->parts_mdl->get_record_by_id($data_lesson['partid']);
        $data_part = $this->array_flatten($data_part);

        //Create new index in lesson array and assign 'namepart'.
        $data_lesson['namepart'] = $data_part['namepart'];

        //Merge array
        $data_lesson = array_merge((array)$data_lesson, (array)$data_media);

        /*
        echo 'Media:';
        $this->jaz_print_r($data_media);
        echo 'Part:';
        $this->jaz_print_r($data_part);
        echo 'Lesson:';
        $this->jaz_print_r($data_lesson);
        */

        $this->load->view('lessons/addlesson_form', $data_lesson);
    }

    //These will delete four divisions Pathways, Classes, Parts and Lessons
    function del_divs() {
        //capture selected checkboxes
        //Determine right division
        //Delete records according to selected check boxes and division
        //Delete child records related to parent selected boxes
        //Display successfull message
        //Display Admin Panel again.

        if(!empty($_POST['pathway']) OR !empty($_POST['class']) OR !empty($_POST['part']) OR !empty($_POST['lesson'])) {
            //Process pathway check boxes
            if(isset($_POST['submitpathway'])) {    //pathway button
                if(isset($_POST['pathway'])) {  //pathway array
                    foreach ($_POST['pathway'] as $id){
                        //Check if children exist related to pathid in classes table
                        $has_children = $this->classes_mdl->get_record_by_id2($id);

                        //If it has no children then delete it.
                        if($has_children == FALSE) {
                            $del_result = $this->pathways_mdl->delete_pathwayid($id);
                        }
                    }
                    //Display successful delete message.
                    $msg = array(
                        'main_msg' =>   'Pathways record(s) successfully deleted. <br>If the record(s) was not deleted, it means it has children.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }

                if(!isset($_POST['pathway'])) {
                    //Display fail message
                    $msg = array(
                        'main_msg' =>   'Sorry, No Pathways check boxes was selected.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }
            }


            //Process class check boxes
            if(isset($_POST['submitclass'])) {  //class button
                if(isset($_POST['class'])) {    //class array
                    foreach ($_POST['class'] as $id){
                        //Check if children exist related to classid in parts table
                        $has_children = $this->parts_mdl->get_record_by_id2($id);

                        //If it has no children then delete it.
                        if($has_children == FALSE) {
                            $del_result = $this->classes_mdl->delete_classid($id);
                        }
                    }
                    //Display successful delete message.
                    $msg = array(
                        'main_msg' =>   'Classes record(s) successfully deleted. <br>If the record(s) was not deleted, it means it has children.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }

                if(!isset($_POST['class'])) {
                    //Display fail message
                    $msg = array(
                        'main_msg' =>   'Sorry, No Classes check boxes was selected.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }
            }


            //Process part check boxes
            if(isset($_POST['submitpart'])) {   //part button
                if(isset($_POST['part'])) { //part array
                    foreach ($_POST['part'] as $id){
                        //Check if children exist related to partid from lessons table
                        $has_children = $this->lessons_mdl->get_record_by_id2($id);

                        //If it has no children then delete it.
                        if($has_children == FALSE) {
                            $del_result = $this->parts_mdl->delete_partid($id);
                        }
                    }
                    //Display successful delete message.
                    $msg = array(
                        'main_msg' =>   'Parts record(s) successfully deleted. <br>If the record(s) was not deleted, it means it has children.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }

                if(!isset($_POST['part'])) {
                    //Display fail message
                    $msg = array(
                        'main_msg' =>   'Sorry, No Parts check boxes was selected.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }
            }


            //Process lesson check boxes
            if(isset($_POST['submitlesson'])) { //lesson button
                if(isset($_POST['lesson'])) {   //lesson array
                    foreach ($_POST['lesson'] as $id){
                        //Delete lesson related to $id
                        $del_result = $this->lessons_mdl->delete_lessonid($id);
                        //echo 'Result: '. $del_result .'<br>';
                    }
                    //Display successful delete message.
                    $msg = array(
                        'main_msg' =>   'Lessons record(s) successfully deleted!',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }

                if(!isset($_POST['lesson'])) {
                    //Display fail message
                    $msg = array(
                        'main_msg' =>   'Sorry, No Lessons check boxes was selected.',
                        'url_txt' =>    'Please click here to go back to Admin Panel.',
                        'url' =>        site_url("admin/cp/"),
                    );
                    echo Modules::run('tasks/message', $msg);
                }
            }


        } else {
            //Display successfull saved message;
            $msg = array(
                'main_msg' =>   'No check boxes are selected!',
                'url_txt' =>    'Please click here to try again.',
                'url' =>        site_url("admin/cp_proc/0/none/"),
            );
            echo Modules::run('tasks/message', $msg);
        }



    }


/*****************************************************
 * Utility methods
 *****************************************************/
    //Test emptying array
    function empty_a() {
        $data = array('fruit' => 'apple', 'color' => 'green');

        echo 'Content: <br>';
        $this->jaz_print_r($data);
        echo '<br><br>';

        echo 'Empty: <br>';
        $data = array();
        $this->jaz_print_r($data);
    }


    function logic_test() {
        $tmp = $this->uri->segment(3, 0);

        if($tmp == 'a') {
            echo 'Cool a.';

        } elseif ($tmp == 'b') {
            echo 'Nice b.';

        } elseif ($tmp == 'c') {
            echo 'WoW!, c.';

        } elseif ($tmp == '') {
            echo 'Tmp is empty!';

        } elseif ($tmp == '0') {
            echo 'Tmp is zero string!';

        } elseif ($tmp == 0) {
            echo 'Tmp is zero integer!';

        } else {
            echo 'Ooops, none is selected!';
        }
        echo '<br><br>TMP: '. $tmp;
    }

    function jaz_print_r($data) {
        echo '<pre>';
        print_r($data);
        echo '</pre>';
    }

    function array_flatten($array) {
      if (!is_array($array)) {
        return FALSE;
      }

      $result = array();
      foreach ($array as $key => $value) {
        if (is_array($value)) {
          $result = array_merge($result, $this->array_flatten($value));
        }
        else {
          $result[$key] = $value;
        }
      }
      return $result;
    }

}