Can opencart provide a way to retrieve the site name? For instance, in case of migrating to a different hosting, to ensure that all links are not bound to a particular host.

So, you're referring to templates? Instead of relative paths, why not use absolute paths? Opencart provides global variables, HTTPSERVER and HTTPSSERVER, which store website addresses.

When working on a website, it is essential to ensure that all links and resources are correctly referenced. One common way to reference resources like images, stylesheets, and scripts is to use relative paths. However, relative paths can sometimes lead to broken links and other issues, especially when moving or copying files to a different location. In such cases, absolute paths offer a more reliable solution, as they provide a fixed reference to the resource's location, regardless of where the file is located. Opencart also offers global variables like HTTPSERVER and HTTPSSERVER, which can store the website's address, making it easy to reference the site's URL in your code.

To migrate an opencart project to a different host, you'll need to update two files: SITE\admin\config.php and SITE\config.php. These files include path constants for the whole project that are used in the admin panel, frontend, and system. The second file, root/config.php, features constant definitions for HTTP, HTTPS, and DIR application paths. Additionally, it includes DB driver specifications, hostname, username, password, database name, port, and prefix information that need to be updated to reflect the new host details.

we can use domain name, it shows the root of the site.
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In OpenCart, you can retrieve the site name by accessing the config file and using the following code:

$this->config->get('config_name');

This allows you to dynamically retrieve the site name, ensuring that all references and links remain accurate even after migration. By doing so, you can maintain a strong online presence and avoid any disruption to the user experience. This attention to detail not only preserves the integrity of your website but also contributes to a seamless transition, ultimately supporting your brand's reputation and online visibility.