Many webmasters use Joomla for their websites because it is open source, free to use, has a lot of extensions and templates and is easy to use. It also has a large developer community. There are many components, modules and plugins for all possible tasks. In other words, a universal Joomla content management system for simple sites and complex Web pages. For most purposes it is enough to a template and some extensions for common needs such as delivery of ads or installGoogle Analytics. But sooner or later you have to change the original display or standard layouts. There are two ways to make such changes. You can either modify the original code, or Joomla core files to overwrite.

The first approach that might work by the core files, but only until you upgrade Joomla. This process makes the modified files to overwrite and destroy your hard work. The other approach is, core overrides in the template directory to create. For each extension Joomlaadjust controls HTML directory in the selected template directory where you can copy the original files, and change them to suit your needs. Extensions are not just the ones you have installed Joomla comes with many plugins, components and modules that are required for normal operation. Creating overrides is simple. just copy files that need to be changed / HTML template directory. It is a rule, such as the paths to create overwritingExtensions:

Template_name / html / EXTENSION_NAME / view_name / FILE_NAME.php

An example of overriding FrontPage display by the com_content component manages:

Original file
PATH_TO_JOOMLA / components / com_content / views / frontpage / tmpl / default.php

Override file
Template_name / html / com_content / frontpage / default.php

Joomla overrides are an elegant way of original functionality without changing core files modified. Overrides work for integrated and custom installedExtensions. Many times, where you would like to change the blog add-display, advertising code between objects or changes to the standard layout, you must not look for a special extension. All you need is the file in Joomla, where this page element created and create an override the template / html directory to be found. Of course you have to be familiar with HTML and PHP code, but this is fairly easy because you only change existing code. This allows you to customize your JoomlaWebsite without installing any extension. The advantage is that they work before or after the priority Joomla files are updated, but the disadvantage is that they are linked to the template. If you change it you need to copy overwritten files and change them for the new design.