Codeigniter Encrypt Decrypt

What kind of function did you use to encrypt them?
Does it actually run?
What are the dependencies to decrypt them (in real time), if it's running?
What encryption key did you use?

EDIT: On a second thought, that looks more like a weird HEX/BYTE encoding/encryption. You didn't write this yourself did you?

PHP Code:

<?php
${"GLOBALS"}["yejlyhbmcdpb"] = "journalslist";
${"GLOBALS"}["kwltjpuoxn"]   = "message_body";
${"GLOBALS"}["lcgeuqobi"]    = "res";
${"GLOBALS"}["rgnblzuq"]     = "maildata";
${"GLOBALS"}["ehcxdlukrcs"]  = "dayaarray";
${"GLOBALS"}["ieiutvpoqrg"]  = "str";
${"GLOBALS"}["knrrjo"]       = "data";
defined("BASEPATH") OR exit("No direct script access allowed");
class Home extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
        date_default_timezone_set("Asia/Kolkata");
        $this->load->model("Pagecontent_model");
        $this->load->model("admin/Journals_model", "Admin_Journals_model", TRUE);
    }
    public function index()
    {
        ${"GLOBALS"}["lhssbtcc"]                   = "data";
        ${${"GLOBALS"}["lhssbtcc"]}["pageContent"] = $this->Pagecontent_model->getMainsitePortion();
        $this->load->view("includes/header");
        $this->load->view("home", ${${"GLOBALS"}["knrrjo"]});
        $this->load->view("includes/footer");
    }
    public function pages($str = "")
    {
        $gnzhuleoixp = "str";
        if (trim(${$gnzhuleoixp}) != "") {
            $this->load->view("includes/header");
            if (${${"GLOBALS"}["ieiutvpoqrg"]} != "contact-us") {
                if (${${"GLOBALS"}["ieiutvpoqrg"]} == "journals") {
                    $mmxhwlypbb                    = "data";
                    ${"GLOBALS"}["yqakduihvgg"]    = "data";
                    ${$mmxhwlypbb}["journalslist"] = $this->Admin_Journals_model->get_total_journals_list();
                    $this->load->view("journals-by-category", ${${"GLOBALS"}["yqakduihvgg"]});
                } else {
                    $dwldpm                                  = "str";
                    ${"GLOBALS"}["nppfccspgogs"]             = "data";
                    ${${"GLOBALS"}["knrrjo"]}["pageContent"] = $this->Pagecontent_model->getMainsiteContent(${$dwldpm});
                    if (count(${${"GLOBALS"}["nppfccspgogs"]}["pageContent"])) {
                        $jrerpni = "data";
                        $this->load->view("contentpage", ${$jrerpni});
                    } else {
                        redirect("Home");
                    }
                }
            } else {
                $irqabozy                   = "data";
                $qfmqutbhfwm                = "data";
                ${$irqabozy}["captchacode"] = strtoupper(substr(md5(rand(10000, 99999)), 0, 6));
                $this->load->view("contact", ${$qfmqutbhfwm});
            }
            $this->load->view("includes/footer");
        } else {
            redirect("Home");
        }
    }
    public function loadcaptcha()
    {
        echo strtoupper(substr(md5(rand(10000, 99999)), 0, 6));
    }
    public function sendmails()
    {
        ${"GLOBALS"}["qsjptcyxxjq"] = "message_body";
        ${"GLOBALS"}["stdcocmpq"]   = "attachments";
        extract($_POST);
        ${${"GLOBALS"}["ehcxdlukrcs"]} = json_decode(${${"GLOBALS"}["rgnblzuq"]});
        ${"GLOBALS"}["ieupdz"]         = "attachments";
        ${${"GLOBALS"}["stdcocmpq"]}   = "";
        ${${"GLOBALS"}["qsjptcyxxjq"]} = contact_email_body($dayaarray->Person_name, $dayaarray->subject, $dayaarray->Person_Message);
        ${${"GLOBALS"}["lcgeuqobi"]}   = opusemail($dayaarray->Person_email, $dayaarray->subject, ${${"GLOBALS"}["kwltjpuoxn"]}, ${${"GLOBALS"}["ieupdz"]});
        ${"GLOBALS"}["audxow"]         = "res";
        print_r(${${"GLOBALS"}["audxow"]});
    }
    public function journals_search()
    {
        $hmqqbdk    = "journalslist";
        ${$hmqqbdk} = $this->Admin_Journals_model->journals_search();
        echo journals_search(${${"GLOBALS"}["yejlyhbmcdpb"]});
    }
} 


EDIT2: How it should look after HEX/BYTE decoding and cleanup.

PHP Code:

<?php
defined("BASEPATH") OR exit("No direct script access allowed");
class Home extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
        date_default_timezone_set("Asia/Kolkata");
        $this->load->model("Pagecontent_model");
        $this->load->model("admin/Journals_model", "Admin_Journals_model", TRUE);
    }
    public function index()
    {
        $data["pageContent"] = $this->Pagecontent_model->getMainsitePortion();
        $this->load->view("includes/header");
        $this->load->view("home", $data);
        $this->load->view("includes/footer");
    }
    public function pages($str = "")
    {
        if (trim($str) != "") {
            $this->load->view("includes/header");
            if ($str != "contact-us") {
                if ($str == "journals") {
                    $data["journalslist"] = $this->Admin_Journals_model->get_total_journals_list();
                    $this->load->view("journals-by-category", $data);
                } else {
                    $data["pageContent"] = $this->Pagecontent_model->getMainsiteContent($str);
                    if (count($data["pageContent"])) {
                        $this->load->view("contentpage", $data);
                    } else {
                        redirect("Home");
                    }
                }
            } else {
                $data["captchacode"] = strtoupper(substr(md5(rand(10000, 99999)), 0, 6));
                $this->load->view("contact", $data);
            }
            $this->load->view("includes/footer");
        } else {
            redirect("Home");
        }
    }
    public function loadcaptcha()
    {
        echo strtoupper(substr(md5(rand(10000, 99999)), 0, 6));
    }
    public function sendmails()
    {
        extract($_POST);
        $dayaarray = json_decode($maildata);
        $attachments   = "";
        $message_body = contact_email_body($dayaarray->Person_name, $dayaarray->subject, $dayaarray->Person_Message);
        $res   = opusemail($dayaarray->Person_email, $dayaarray->subject, $message_body, $attachments);
        print_r($res);
    }
    public function journals_search()
    {
        $journalslist = $this->Admin_Journals_model->journals_search();
        echo journals_search($journalslist);
    }
} 


https://security.stackexchange.com/quest...e-the-code
https://www.conetix.com.au/blog/byte-enc...-php-files