Home » Functions » flush_rewrite_rules

Function Name: flush_rewrite_rules

In the realm of WordPress development, the flush_rewrite_rules function holds significant importance. This function is responsible for flushing and regenerating the rewrite rules for your WordPress site. But what exactly does that mean?

To put it simply, when you create custom post types, taxonomies, or even custom rewrite rules in WordPress, the rewrite rules need to be refreshed and updated so that WordPress can properly handle and route the URLs associated with these custom structures. This is where the flush_rewrite_rules function comes into play.

By calling this function, you trigger the regeneration of the rewrite rules, ensuring that any modifications or additions you’ve made to the structure of your WordPress site are correctly recognized and processed. Without this function, your custom URLs might produce 404 errors or not function as intended.

Usage Example:

Let’s say you have created a custom post type called "portfolio" with the rewrite slug "projects" using the register_post_type function. After making changes to the rewrite rules or adding a new custom post type, you would want to flush the rewrite rules to ensure the changes take effect. Here’s an example code snippet of how you would use the flush_rewrite_rules function:

function custom_flush_rewrite_rules() {
    // Flush the rewrite rules
// Hook the function to a specific action, such as theme activation
add_action('after_switch_theme', 'custom_flush_rewrite_rules');

In this example, we define a function called "custom_flush_rewrite_rules" which includes the call to flush_rewrite_rules. We then use the add_action function to hook this custom function to the "after_switch_theme" action, which ensures that the rewrite rules are flushed whenever the theme is activated.

By utilizing the flush_rewrite_rules function in your WordPress development projects, you can ensure that any modifications you make to the rewrite rules are properly recognized and applied by WordPress, providing a seamless experience for your site visitors.

Learn More on WordPress.org

WordPress snippets using the flush_rewrite_rules function

Register an account to save your snippets or go Pro to get more features.