Strips posts from search queries if ACF meta value post_is_hidden is active

strip-acf-meta-from-search.php

<?
/**
 * Strips posts from search queries if ACF meta value post_is_hidden is active.
 *
 * @author AM.HIGH
 * @version 1.0.0
 * @since   1.0.0
 */

function dontSearchTheHidden($query) {
	if (!$query->is_search()):
		return;
	endif;
	$query->set('meta_query', array(
		'relation' => 'OR',
		array(
			'key' => 'post_is_hidden',
			'compare' => 'NOT EXISTS',
		),
		array(
			'key' => 'post_is_hidden',
			'value' => '0',
			'compare' => '=',
		),
	));
	$query->set('post_type',array('post','page','property'));
}

add_action('pre_get_posts', 'dontSearchTheHidden');
?>