MT | ECP | Limit the number of tags visible to ECP widget filters in WP Admin

tribe_limit_get_terms.php

/*
 * Limits the number of tags visible to the TEC widget filter in WP Admin
 *
 * Useful for when your site has loads of tags. Which causes WP Admin > Widgets
 * page to load very slowly or not at all.
 */
function tribe_limit_get_terms( $terms, $taxonomy, $query_vars, $term_query ) {

	if( ! is_admin() ) return $terms;

	$num_of_tags_to_show = 50;
	$target_tax = array( 'post_tag' );
	$wp_screen = get_current_screen();

	if( $wp_screen->base !== 'widgets' ) return $terms;
	if( $taxonomy !== $target_tax ) return $terms;

	return array_slice( $terms, 0, $num_of_tags_to_show);

}
add_filter( 'get_terms', 'tribe_limit_get_terms', 10, 4 );