Child Theme

Child theme is the theme that inherits functionality as well as styling from the parent theme.Child theme is a better way to modify the existing parent theme.
Child themes are separate but have most of the functionalities of the parent theme.Wordpress first checks whether a functionality is present in child theme, if doesn’t it will use the parent theme.
Child theme is a great idea as it can modify and add to the functionality of the parent without modifying it directly.
If we directly modify the theme without creating the child theme, there are two choices:
1) Not opt to update the theme in the future or
2) Update and sacrifice the modifications you have made.
Advantages of using Child Theme:

1) If we are using the existing parent theme as itself and modifying it whenever we need to update the theme, our changes will be lost.
By using child theme, our modifications will preserved.
2) We can speedup Development time.
3) Also the developer can learn basics of WordPress theme development.
4) At any time parent theme acts as a backup (Easy to restore).

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About WordPress

WordPress is the most popular blogging tool on the web and is used by millions of people worldwide. It uses a Content Management System (CMS) allowing users to control their content in a simple and easy to use interface.

History

WordPress has been around for nearly 10 years (originally named B2) and was designed to be a blogging tool. However, because it is completely free and customisable it has evolved beyond a tool just for blogs and is now used for full websites allowing people to share a whole range of information and keep it up to date. It has won countless awards and is the most popular CMS system around.

Open Source

One of the main reasons why WordPress is so popular is that you can edit everything about it and any one can change the way it works and looks. So people who are highly experienced can add, change and customise the framework and people who are new to it can just use the basic standard system. If you are willing to learn there are also a vast amount of tutorials and forums available online.

Themes

Along with being able to edit the structure and user interface WordPress also allows users and developers to change the style of the website easily with the click of a button and thousands of styled templates are available to choose from. Themes also have lots of customisable options and features.

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