How to properly escape the $ sign in sublime snippets?

Question

Sublime Text

I want to write such a snippet

<?php foreach(): ?>

 <?php endforeach; ?>

I write the following code in a snippet

<?php foreach(${\$1} as ${\$2:this}): ?>
    $(\$3:this};
<?php endforeach; ?>

When I turn, I get What did I not take into account? Thanks in advance
<?php foreach(${\ ?>

Answer 1

<?php foreach(\$${1:} as \$${2:this}): ?>
  \$${0:this}
<?php endforeach; ?>

Answer 2

▼ Unofficial - official Sublime Text 3 documentation ▼
-- docs.sublimetext.info/en/latest/extensibility/snip... --
The easiest solution the documentation suggests is to use the backslash as an escape character before the dollar. Original text from documentation ▼
If you want to get a literal $, you have to escape it like this: \$.
For example:
There is a line in the snippet - Bz$f}qwTC$GmG}Us5dq?fIipsLcKD$D$vHI .
Enter backslashes - Bz\$f}qwTC\$GmG}Us5dq?fIipsLcKD\$D\$vHI.
Voila! Everything is working!