How USE PHP in WordPress

WordPress is written in many languages, but PHP is one of the most important programming and scripting languages used. Like WordPress, PHP is open source, which makes it one of the easiest languages to create websites these days.

But how exactly does PHP work? Let's say someone visits your WordPress travel blog website. Before they can see anything, their web server receives a request to publish their homepage. This means that the link on your homepage (also called URL) requests a PHP file.

After the server knows the PHP code to be executed, it executes the corresponding PHP code before it is ready to be sent back to the web user. The PHP program responsible for your homepage generates the corresponding HTML and sends it to the web user. The raw HTML code generated by the PHP being sent is not what you will see physically. The web user only sees the final version of the homepage of his travel blog full of funny stories and photos of his adventures.

There are many tools you can use to create the best website. They can help you skip writing the code and jump straight to creating the perfect website. Check out these free content management tools and systems to get you started.

What WordPress Areas Use in PHP?

WordPress files, various themes, additional add-ons and various functions are written in PHP. Let’s take a closer look at some of these areas.

Downloading WordPress

If someone starts with WordPress, they will encounter PHP the first time they download it. After going to WordPress.org and downloading the latest version, you can see how PHP is used in WordPress. The content of the WordPress ZIP file below shows that the main files are written in PHP (see the extension of the .php file).

Plugins and Themes

When you install a theme on your WordPress website, numerous files are displayed in the PHP language. Let's look at one of these popular topics: Astra. Below is a list of downloaded files.

Like the themes, add-ons are mainly written in PHP.

Classes,Functions and Hooks

In detail, WordPress uses PHP for functions, hooks and classes and makes WordPress so flexible. They are used to expand your WordPress functionality.

Functions

Each WordPress theme has a file called "functions.php". This special file allows developers to define features and functions of the topic. The file acts as a WordPress plugin and is used to add your own custom code bits in WordPress. In contrast to an add-on, it is only recognized in the currently used topic. Let's take a look at some of the most popular WordPress features.

• get_theme_mod (): Get the change value of the topic for the current topic. 
• add_setting (): Adds a custom configuration. 
• apply_filters (): Calls the functions that have been added to a filter link. 
• get_comments_number (): Get the number of comments on a post. 
• add_section (): Adds a custom section. 
• is_home (): Determines whether the query is for the blog homepage. 
• get_sidebar (): Loads the template from the sidebar. 
• esc_attr (): Escape HTML attributes. 
• get_option (): Get an option value based on the name of an option. 

 This is just a small extract from the full list of WordPress functions.

Hooks

If you've ever changed, expanded, deleted, or changed anything in WordPress, you've probably used a hook to do so. There are two types: the hook with which something or an action is to be carried out and the adjustment or filter hook. If you want to add, remove or update the functionality, use the action link. For example, send an email or add instructions. If you want to change (ie filter) the existing output, use the filter link. For example, add links to a publication or change the style of a header.


There are options you can choose if you want to change your code. You can use the WordPress action hook reference and filter hook reference to make the changes you want.

Classes

A class is a concept of object-oriented programming. Classes are useful for PHP to represent everyday objects that we understand (e.g., car, home, or business). It is easy to see that a class can help organize and group its functions, but a function cannot group its classes. For example, we can have a class called Auto. This vehicle class can have a function called drive () and an attribute called current_speed. Interestingly, you don't have to use any functions within your classes.

Do you have to know Php code to use Wordpress?

As a WordPress user, you don't need to learn PHP to create, run, or manage a WordPress website. This is one reason why WordPress is so easy to use.

Most people can use WordPress without learning PHP or how to program. However, it will open up new opportunities if you know PHP. If you know PHP, you always have the option to change, develop, or experiment with your WordPress site. More advanced developers can use PHP for more complex customizations.


With some basic PHP knowledge, you can learn common and popular features that can help you make important changes to your WordPress site quickly and easily. It is also possible to change topics and create add-ons. Before you know it, you'll take advantage of the functions, variables, and strings, and then use them with WordPress hooks, actions, and filters.

Winding Up

WordPress is created with PHP. You can find PHP throughout your system. PHP is used to download WordPress, to customize and add features to your site, or to add themes and add-ons. PHP is one of the great elements that help WordPress be the CMS it is.