codeigniter view $class not working correct - php

Question

On my codeigniter project with HMVC on my view page the $class is not showing correct one. When I try to view my modules if there is no column left or right it should go to col-sm-12
For some reason it shows col-sm-9 when it should be col-sm-12 if no column left or right.
<?php echo $header; ?>
<div class="container">
<div class="row"><?php echo $column_left; ?>
<?php if ($column_left && $column_right) { ?>
<?php $class = 'col-sm-6'; ?>
<?php } elseif ($column_left || $column_right) { ?>
<?php $class = 'col-sm-9'; ?>
<?php } else { ?>
<?php $class = 'col-sm-12'; ?>
<?php } ?>
<div id="content" class="<?php echo $class; ?>"><?php echo $content_top; ?><?php echo $content_bottom; ?></div>
<?php echo $column_right; ?></div>
</div>
<?php echo $footer; ?>
How can I make it display col-sm-12 if no column-left or column-right?
Thanks in advance.
Added Controller
<?php defined('BASEPATH') OR exit('No direct script access allowed');
class Home extends MX_Controller {
public function index() {
$data['column_left'] = Modules::run('catalog/common/column_left/index');
$data['column_right'] = Modules::run('catalog/common/column_right/index');
$data['content_top'] = Modules::run('catalog/common/content_top/index');
$data['content_bottom'] = Modules::run('catalog/common/content_bottom/index');
$data['footer'] = Modules::run('catalog/common/footer/index');
$data['header'] = Modules::run('catalog/common/header/index');
return $this->load->view('theme/default/template/common/home_view', $data);
}
}

Answer 1

You don't need to put those thousand php opening and closing tags.
<?php
if (!empty($column_left) && !empty($column_right)) {
$class = 'col-sm-6';
} elseif (!empty($column_left) || !empty($column_right)) {
$class = 'col-sm-9';
} else {
$class = 'col-sm-12';
}
?>
UPDATED
Remove return from this statement
return $this->load->view('theme/default/template/common/home_view', $data);
This should be :
$this->load->view('theme/default/template/common/home_view', $data);

Answer 2

elseif(empty($column_left) || empty($column_right)){ ?>
<?php $class = 'col-sm-12'; ?>
<?php } ?>

Answer 3

If $column_left or $column_right is set then it will never reach the last else part. Just check with !empty(). It will check if the value is empty or not.
<?php if ($column_left && $column_right) { ?>
<?php $class = 'col-sm-6'; ?>
<?php } elseif (!empty($column_left) || !empty($column_right)) { ?>
<?php $class = 'col-sm-9'; ?>
<?php } else { ?>
<?php $class = 'col-sm-12'; ?>
<?php } ?>

Answer 4

I found out what problem was it was most simplest thing I had forgotten the to add the id on my column left and right
And thanks to #tiGer of the remove return also helped
Column Left Module
<?php if ($modules) { ?>
<column id="column-left" class="col-sm-3 hidden-xs">
<?php foreach ($modules as $module) { ?>
<?php echo $module; ?>
<?php } ?>
</column>
<?php } ?>
Column Right
<?php if ($modules) { ?>
<column id="column-right" class="col-sm-3 hidden-xs">
<?php foreach ($modules as $module) { ?>
<?php echo $module; ?>
<?php } ?>
</column>
<?php } ?>