Limit user to vote per day by cookie method

wp-ulike.php

<?php

function wp_ulike_custom_permission_status( $status, $args, $settings ){
	$cookie_key  = sanitize_key( 'wp_ulike_manual_' . $args['type'] . $args['item_id'] );
	$has_cookie  = false;

	if( isset( $_COOKIE[ $cookie_key ] ) ) {
		$status     = false;
		$has_cookie = true;
	} else {
		$status     = true;
	}

	if( ! $has_cookie && $args['method'] === 'process' ){
		\setcookie( $cookie_key, "on", time()+86400, '/' );
	}

	return $status;
}
add_filter( 'wp_ulike_permission_status', 'wp_ulike_custom_permission_status', 20, 3 );