Function and usage of create_initial_rest_routes() in wordpress


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    The create_initial_rest_routes() function in WordPress is an important part of the WordPress REST API. This function is responsible for registering the default REST API routes, which are essential for handling HTTP requests to various endpoints.

    Function Overview:

    • Function Name: create_initial_rest_routes()
    • Purpose: Registers default REST API routes.
    • File Location (as of my last update): Typically found in the wp-includes/rest-api.php file.

    Core Functionalities:

    1. Route Registration: It automatically sets up the standard routes that WordPress provides for its REST API. This includes routes for accessing posts, pages, users, comments, taxonomies, and other WordPress core features.

    2. Method Handling: The function ensures that each route is associated with the appropriate HTTP methods (GET, POST, PUT, DELETE, etc.). It also defines the callback functions that should be executed when these routes are accessed.

    3. Permissions Callbacks: It helps in assigning permission callbacks to routes, ensuring that only authorized users can access or modify data via the API.

    4. Extensibility: While create_initial_rest_routes() sets up the default routes, developers can further extend or modify these routes or add new custom routes using hooks and filters provided by WordPress.

    Sample Usage:

    1. Initialization: This function is typically called during the WordPress initialization process. It's not usually called directly by themes or plugins. Instead, it's part of the core setup of the REST API infrastructure in WordPress.

    2. Custom Endpoint Creation: While this function itself doesn't get directly used for creating custom endpoints, understanding its role is crucial for developers looking to extend the REST API. After the initial routes are registered, developers can add custom endpoints using functions like register_rest_route().

    3. Hooks and Filters: Developers can hook into the REST API request handling process using actions and filters. For example, one might use the rest_api_init action to register custom routes or modify existing ones after create_initial_rest_routes() has done its job.


    create_initial_rest_routes() is a key function in setting up the WordPress REST API's default behavior. It provides a solid foundation upon which developers can build by extending or modifying routes to suit custom requirements. Understanding this function is essential for anyone looking to work extensively with the WordPress REST API.

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