Add tags to contacts in FluentCRM when viewing a post in a specific category.

update_contact_tags_on_category_view.php

<?php
// Add tags to contacts when viewing a post in a specific category.
function update_contact_tags_on_post_view() {
	// Return if they aren't logged in.
	if ( ! is_user_logged_in() ) {
		return;
	}

	// Return if the FluentCrmApi is not available.
	if ( ! function_exists( 'FluentCrmApi' ) ) {
		return;
	}

	// Check if we are viewing a single post and if the post is in the 'recipes' category.
	if ( is_single() && has_category('recipes') ) {

		// Get the current contact.
		$contact = FluentCrmApi('contacts')->getCurrentContact();
		if ( $contact ) {
			$tagsToAdd = [4]; // Specify the tag IDs you want to add.

			// Attach the tags to the contact.
			$contact->attachTags($tagsToAdd);
		}
	}
}
add_action( 'memberlite_after_content_single', 'update_contact_tags_on_post_view' );