How to remove a certain starting symbol and its closing symbol, but not the contents?

Question

Consider this string:

foo{This is my inner content. Hello}

What I want to do with regex is make it so it becomes like this:

This is my inner content. Hello

Note that I only want to match foo{ and }, when put together and used like that. I don't want, for example, foo2{ and }.

Is there a way?

Answer 1

Use:

$str = preg_replace('/foo\{([^}]*)\}/', '$1', $str);

Answer 2

Seems pretty simple:

/foo{(.*?)}/