Filter categories tracking custom dimension with Google Analytics

filter-categories-tracking-custom-dimension-with-google-analytics.php

function sp_gtag_cd_categories_cf($html) { 
	return "'dimension2': 'cd_categories',"; 
} 
add_filter('seopress_gtag_cd_categories_cf', 'sp_gtag_cd_categories_cf'); 

function sp_gtag_cd_categories_ev($html) { 
	return "gtag('event', '".__('Categories','wp-seopress')."', {'cd_categories': '".$get_first_category."'});"; 
} 
add_filter('seopress_gtag_cd_categories_ev', 'sp_gtag_cd_categories_ev');