syntax - php {$var} meaning -

hello,

what meaning of {$var} in php?

example:

$query = "update table set field = '{$var}'"; 

thx.

{$var} "shields" variable name surrounding characters. example:

$root = "stick"; echo "{$root}y"; # adjectify! 

will output "sticky", where:

$root = "stick"; echo "$rooty"; # adjectify! no, kidding. 

will output nothing @ all, since variable $rooty doesn't exist.

it allows use expressions more variable names, array indexing or property access.