Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial![](https://ecs-static.teamtreehouse.com/assets/views/marketing/shared/community-banner-white-47072046c51352fe6a69f5e691ff5700b28bb11d45197d7bdf066d9ea3f72d0c.webp)
![Brandyn Lordi](https://secure.gravatar.com/avatar/7d67ff0f332633349b902885f2fc0501?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Brandyn Lordi
17,778 PointsWhy the curly braces?
why are there curly braces around $prop in this line:
return $jwt->{$prop};
1 Answer
![Chris Shaw](https://secure.gravatar.com/avatar/89a81f4cc3cec373f6a1547fde9e8c26?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Chris Shaw
26,676 PointsHi Brandyn Lordi,
The curly braces denote a dynamic expression for retrieving member values within an object. In the case of your example above, $prop
is the member name of the $jwt
object. Below is a few different ways of accessing object values.
$alg = 'alg';
$jwt->alg // Directly
$jwt->{'alg'} // Dynamically using a string
$jwt->{$alg} // Dyanmically using a variable
Hope that helps!
Brandyn Lordi
17,778 PointsBrandyn Lordi
17,778 PointsMakes sense. Thanks