======Components Depending On The Page ======
=====Component Only on One Page=====
If you would like a component to be displayed on only one page, that can be done by adding the following code to your theme's **template.php** file:
<code><?php if (return_page_slug()=='PAGE') get_component('COMPNAME'); ?></code>

Don't forget to replace **PAGE** with your **page's slug** and **COMPNAME** with the **component's name**.

=====Several Pages Each with Different Components=====
Say you have three pages with the slugs //index//, //about//, //contact// and sidebars as components named //peter//, //paul// and //mary// you would edit your template to replace <code><?php get_component(sidebar); ?></code> with
<code>
<?php if (return_page_slug()=='index') {get_component('peter');}
 elseif (return_page_slug()=='about') {get_component('paul');}
else {get_component('mary');} ?> </code>
which in English reads

>**If** the page slug is //index// insert the component //peter//, **otherwise if** the page slug is //about// insert the component //paul// and **otherwise** just insert the component //mary//.



===== Components Depending On The Parent Page =====
Now If you want a component to be displayed on pages of a specific parent page, you can do it in a similar way:
<code><?php if (get_parent(0)=='PAGE') get_component('COMPNAME'); ?></code>

Again, don't forget to replace **PAGE** with your **page's slug** and **COMPNAME** with the **component's name**.


===== Excluding components =====
If you would like to exclude a component from a page you could do that by replacing "**==**" with "**!=**" in the code above.

=====A System for Different Components on Different Pages=====

The Components might contain a header image, sidebar content, tagline text, anything. If you only want one page to be different it might be simplest to just make a duplicate page template, but if you want them different on each of several pages here is how.

The following text needs to be in a functions.php file in your theme folder:
<file php><?php
if (!function_exists('component_exists')) {
    function component_exists($id) {
        global $components;
        if (!$components) {
             if (file_exists(GSDATAOTHERPATH.'components.xml')) {
                $data = getXML(GSDATAOTHERPATH.'components.xml');
                $components = $data->item;
            } else {
                $components = array();
            }
        }
        $exists = FALSE;
        if (count($components) > 0) {
            foreach ($components as $component) {
                if ($id == $component->slug) {
                    $exists = TRUE;
                    break;
                }
            }
        }
        return $exists;
    }
}
?></file>

Make a component which will be the default component and call it say //default//. Make components for specific pages and name them to include the page slug of the page into which they are to be inserted, so name them say //content-about// and //content-contact//. Then call the component in your page template as follows:
<code php>
<?php  if (component_exists('content-'.get_page_slug(false)))
	  {get_component('content-'.get_page_slug(false));}
     else {get_component('default');}	?></code>

======Links======
Back to the GetSimple Wiki [[:start|Contents Page]]
===How to Have Different sidebars===
[[http://mvlcek.bplaced.net/how-to/sidebars/]]