PHP str.replace：一次两个或更多？

Question

let's say I have a string like this:

$str = "{aaa,aa,a,aaaaaaaa,aaaaaaa,aaaaaaa}";

I want to remove both { & } using str_replace only once.. Possible?

I've tried

$str = str_replace ('}', '{', '', $str);

$str = str_replace ('}'&'{', '', $str);

$str = str_replace ('}'||'{', '', $str);

$str = str_replace ('}''{', '', $str);

and none works...

Answer 1

$str = str_replace(array('}', '{'), '', $str);

str_replace accepts arrays as its first and second argument