Simple PHP Help Please (Variable inside a String?)

Hi there, let's say I have something like:

$default = 'mysite.com/pic.jpg'

However the pic.jpg is defined by this: print $comment->extra_abc;

So basically I need it to look like this:

$default = 'mysite.com/ print $comment->extra_abc;.jpg'

But obviously it is just reading it as string, I do not know how to insert this correctly, could anybody advise me in the right direction please?

 

$default = "mysite.com/ print $comment->extra_abc.jpg"

double quotes

 

Thankyou very much! Told you it was simple

 

correction: $default = "mysite.com/$comment->extra_abc.jpg";

and ur welcome