We are using WordPress as a CMS for a client who needed a 3 column layout for all the pages except one. This one page needed a full width content without any sidebars. Instead of using a different template for this one page, I decided to use PHP conditionals..

First, set the div for the content, depending on which page is displayed. The page we are removing the sidebars for is “short-sale-listings-phoenix”. Don’t forget to set the styles in style.css.

<?php  // display full width content or normal width content for 2 sidebars
	if (is_page('short-sale-listings-phoenix')) { ?>
         // display full width content
	<div id="content-wide">
	<?php } else { ?>
        // display narrow width content for use with sidebars
	<div id="content">
    <?php } ?>

Second, add or remove the sidebars.

<?php  // display sidebar or not
	if (is_page('short-sale-listings-phoenix')) { ?>
        // display no sidebar
    <?php } else { ?>
       // display sidebar
    <?php get_sidebar(); ?>
<?php } ?>

<?php  // display sidebar or not
	if (is_page('short-sale-listings-phoenix')) { ?>
        // display no sidebar
    <?php } else { ?>
      // display sidebar
    <?php get_sidebar('right'); ?>
<?php } ?>

That’s it.

Resource: If you need more help, here is a great article by Darren Hoyt Multiple WordPress Page Layouts in One Single Template.

This tutorial will cover how to add a second sidebar to your WordPress theme. This is very useful when you have a 3 column layout.

WordPress 2.5 introduced the name parameter to the include tag get_sidebar().

We are going to add a widgetized left sidebar and a widgetized right sidebar to a 3 column layout.

Step 1: Create 2 files, named sidebar.php and sidebar-right.php.

Code for sidebar.php

<?php
/**
Template Name: Sidebar
 */
?>
<div id="sidebar">
<ul>
<?php 	/* Widgetized sidebar, if you have the plugin installed. */
if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar() ) : ?>
<?php endif; ?>
</ul>
</div>

The id of the sidebar can be anything you would like. The code between the php tags should not be changed.

Code for sidebar-right.php

<?php
/**
Template Name: Sidebar Right
 */
?>
<div id="sidebar-right">
<ul>
<?php 	/* Widgetized sidebar, if you have the plugin installed. */
if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('Sidebar Right') ) : ?>
<?php endif; ?>
</ul>
</div>

The id of the sidebar can be anything you would like. The code between the php tags should not be changed.

Step 2: Add the following to your template files where you would like your sidebars to display in your layout. The most template files are archive.php, category.php, index.php, page.php and single.php. The WordPress Codex has a tutorial on template pages and template hierarchy.

<?php get_sidebar(); ?>
<?php get_sidebar('right'); ?>

Step 3: Add this to your functions.php page.

<?php
if ( function_exists('register_sidebar') )
    register_sidebar(array(
        'before_widget' => '<li id="%1$s" class="widget %2$s">',
        'after_widget' => '</li>',
'before_title' => '<h2 class="widgettitle">',
        'after_title' => '</h2>',
    ));

    register_sidebar(array('name'=>'sidebar-right'
    ));

Below is what it should look like in your WordPress admin panel.