using $this when not in object

[nudl3s]

Hello all, I am making promo page, but it's giving me this error 

"Fatal error: Using $this when not in object context in /home/fhlbg/public_html/application/views/promo_test.php on line 2"

 

file is promo_test.php

<?php $this->view("common/header"); ?>

 <link rel="canonical" href="<? echo site_url() ?>" />
<!-- <link rel="stylesheet" href="/css/bx_styles/bx_styles.css" type="text/css" /> -->
<!-- <script type="text/javascript" src="/js/jquery.bxSlider.js"></script> -->
<!-- <script type="text/javascript" src="/js/jquery.bxslider.min.js"></script> -->

<div class="inner">
        <div class="inner shadow">
            <?php 
                $query = 'SELECT id, 
                                 title_bg AS `title_cat` 
                                 FROM  categories
                                 WHERE is_active = 1';
                $result = $this->db->query($query);
            ?>
            

            <?php foreach ($result->result() as $row): ?>
               

I can't understant how $this is working here, because in the already done page "home.php" is working, both are in the same directory. 

This is home.php:

<?php $this->view("common/header"); ?>
<link rel="canonical" href="<? echo site_url() ?>" />
<!-- <link rel="stylesheet" href="/css/bx_styles/bx_styles.css" type="text/css" /> -->
<!-- <script type="text/javascript" src="/js/jquery.bxSlider.js"></script> -->
<!-- <script type="text/javascript" src="/js/jquery.bxslider.min.js"></script> -->
<script type="text/javascript">
	jQuery(document).ready(function($) {
        $('#slider1').bxSlider({
            slideSelector: 'div.slide',
            controls: false,
            pager: false,
            pause: 3000,
            auto: true,
            autoHover: true,
            moveSlides: 3,
            minSlides: 1,
            maxSlides: 3,
            slideWidth: 235
        });
		
    });
</script>
<div class="inner inner-transparent">
    <div class="slider-wrapper theme-default">
        <div id="slider" class="nivoSlider">
            <?PHP

If anyone can help me solve this or to explane me how it works here.

Edited January 12, 2017 by nudl3s

[requinix]

$this will be available if the file is being include()d from within a class. Apparently home.php is being included that way but your new promo_test.php is not.

[nudl3s]

So is there any way I can run the page without including it.

Edited January 12, 2017 by nudl3s

[Jacques1]

No. You must properly integrate your page into the application infrastructure like all other pages (however that works).

Edited January 12, 2017 by Jacques1