In JavaScript you can use only / as a delimiter (or ' or " when you're using new Regex() constructor).

Example JS:
/Hello, (\w+)/ig.test('Hello, John');
new RegExp('Hello, (\w+)', 'ig').test('Hello, John');

In PHP, however, you can use / or # or % or + or ~, as well as pair of the following brackets: [], <>, {}, ().

Example PHP:
preg_match('/Hello, (\w+)/', 'Hello, John')
preg_match('#Hello, (\w+)#', 'Hello, John')
preg_match('[Hello, (\w+)]', 'Hello, John')

The problem is, only slash-char / is recognized by QuickDocs. If I would like my patterns to be recognizable I'm forced to change all # by /, which in some cases isn't quickly possible.

This sounds, kinda silly, but I can't seem to use it! How do I access it from the navigation menu (which specific menu item?)