How to Prevent Infinite Loops in `save_post` Hook in WordPress

When you use the save_post hook, you may run into an infinite loop issue. This happens when you try to update the post inside the save_post action, which re-triggers the hook endlessly.

To solve this:

1. Hook into save_post: Add your custom function to save the post.
2. Remove the Hook Before Updating: Before calling wp_update_post(), temporarily unhook your function to stop it from firing again.
3. Re-hook After Update: Once the update is done, reattach the hook.

Final Example:

function your_custom_save_function($post_id) { // Ensure this only runs once by unhooking remove_action('save_post', 'your_custom_save_function'); // Update the post without triggering the save_post hook again wp_update_post(array( 'ID' => $post_id, 'post_title' => 'Updated Title', )); // Re-hook the save_post action to handle future saves add_action('save_post', 'your_custom_save_function'); } // Hook into save_post add_action('save_post', 'your_custom_save_function'); 

This way, you prevent the infinite loop and ensure your updates go through smoothly.