What is the meaning of curly braces in PHP?
In PHP curly braces are used to explicitly indicate the end of a string.
for example let’s say you have this:
$computer = ‘computer’;
if i write
echo “There are 10 $computers in the room”;
The parser will tell that it does not recognize $computers.
Notice: Undefined variable …
however the parser will be very happy with the following:
echo "There are 10 {$computer}s in the room";
Reference