The rest_get_url_prefix() function in WordPress

Understanding WordPress Functions and rest_get_url_prefix()

Hello friends! Today, we want to talk about the function rest_get_url_prefix() in WordPress. This function exists in the WordPress core and helps us to easily retrieve the base URL of the REST API. APIs or interfaces for developers, are one of the most significant parts of any content management system, and WordPress is no exception.

One of the reasons we use the REST API is the ability to easily access our site's data and utilize them in various locations. For example, we can access post data, users, and comments without needing a complete page load, just with a simple request to the server.

Now, let’s delve deeper into rest_get_url_prefix(). This function is usually used in functions.php files or anywhere that requires the URL to be retrieved, and it will be employed. In general, this function returns a string that contains the previous URL for accessing the REST API.

As a simple example, assume you want to utilize the REST API to retrieve the latest posts of your site. With the help of this function, you can construct the correct URL and then use it for sending various requests. Now, let’s take a look at a code snippet.

Code Example

// Retrieve the base URL of the REST API
$url_prefix = rest_get_url_prefix();

// Display the URL in the PHP environment
echo $url_prefix;

Code Explanation

Code 1: $url_prefix = rest_get_url_prefix();

In this line, we are invoking the function rest_get_url_prefix() to retrieve the base URL of the REST API and store it in the variable $url_prefix.

Code 2: echo $url_prefix;

In this line, we are printing the value of the variable $url_prefix to see what URL we have retrieved.