How to hide a block only on a specific Joomla 3 page?

Question

PHP

Good to everyone!
Question on Joomla 3, and partly on PHP, I don’t even know where to dig better.
On a Joomla 3 site, I often use the constructs:

<!-- Только для главной страницы -->
<?php if (JURI::current() == JURI::base()) : ?><?php endif; ?>
<!-- Для внутренних страниц -->
<?php if (JURI::current() !== JURI::base()) : ?><?php endif; ?>

To display a block or text only on the main page or only on the internal ones, respectively.
And now the task has arisen to hide the "Contacts" block on the "Contacts" page (let's say its ID=5, if necessary).
PS: Thematic forums on Joomla 3 did not help me much. Perhaps here.
PPS: Displaying through the standard module manager is not convenient, since the block already consists of three modules and contains static text.

Answer 1

Create a module and configure it using standard Joomla tools.
And these are all crutches.