Wordpress : How to hide page depend on time in php - php

Question

I'm looking to hide some page of a website between 10 AM AND 20 PM each day
I add the code below on the file function.php
<?php
if (date('H')>10 && date('H')<20{echo 'url page';}
?>
This code breaks the website. I'm looking for the correct code to add.

Answer 1

Besides syntax errors mentioned in comments, I guess you need to check whether it is the particular page you need to lock down, so you won't do that to the entire site. If that page is some WordPress post, you can block access by post ID, like this:
function blockAccessFromPost($post) {
$post_id = $post->ID;
$hours = intval(date('H'));
if ($hours >= 9 && $hours < 20 && $post_id === 1123) {
echo 'Please wait...';
exit; // exit is required so no further code is executed.
}
}
add_action('the_post', 'blockAccessFromPost');
In case if you don't know where to find the post/page id, here's the article.
The previous version of the answer was wrong, because it was unable to get access to the post data right away, WordPress was not initalized. the_post hook helps to execute the code in the moment when current post data has just loaded.

Answer 2

Still the same, I really don't know with, your code look perfect. When I use it, the post disappear in the list and I can see wirtten "Please wait...1391". But widget footer etc disappear.
I post you back the code below to be sure to use it well..
function blockAccessFromPost($post) {
$post_id = $post->ID;
$hours = intval(date('H'));
if ($hours >= 9 && $hours < 20 && $post_id === 1391) {
echo 'Please wait...';
echo $post->ID;
exit; // exit is required so no further code is executed.
}
return $post;}
add_action('the_post', 'blockAccessFromPost');
?>```