5. Variables and Functions
Here are some of the functions and variables you need to develop a theme.
| Name | Type | Description | 
| $_theme | Class (Object) | Enables to use the theme.php class in your theme file. Example Usage | 
| $_theme_name | String | Gives the folder name of the theme. | 
| $_theme_display_name | String | Gives the name of the theme in the setting file. | 
| $meta | Array | It comes as an array. Example Returned Value | 
| $header_title | String | The header name of the found page. | 
| $header_description | String | The header description, if available. | 
| $breadcrumb | Array | It comes as an array. Example Returned Value | 
| $tpath | String | For example: Returns a return reply as templates/website/Themename/ | 
| $tadress | String | Returns a return reply as https://site.com/templates/website/Themename/ | 
| $badress | String | https://site.com/ gives the address where the system is installed. | 
| $sadress | String | Gives the following address: https://site.com/resources/. | 
| $master_content_none | Boolean | If used in the theme file, master content is disabled and the theme file is called directly. | 
$ _theme sample usage
   /*Sample Function Call Code*/
   echo $_theme->example_function();
   /*Sample Variable Usage */
   echo $_theme->language["lang-key"];
Sample $meta Information
[
   'title' => 'Meta Title',
   'keywords' => 'Meta Keywords',
   'description' => 'Meta Description'
]
$breadcrumb Sample Information
[
   [
      'title' => "Home",
      'link'  => "",
   ],
   [
      'title' => "Contact Us",
      'link'  => "https://www.site.com/contact",
   ]
]