在php preg_match中如何在花括号之间提取字符串和特殊字符

我有这样的绳子

$string ="this is test {username} ,{password@123} and Other {asdfg@#$}"

我想要这个字符串作为数组格式，如下所示

[1] => Array
        (
            [0] => username
            [1] => password@123
            [2] => asdfg@#$
        )

（？
这给了你想要的
谢谢你，伙计，按照我的要求工作
(?<={)[^}]+(?=})

$re = "/(?<={)[^}]+(?=})/mi";
$str = "this is test {username} ,{password@123} and Other {asdfg@#\$}";

preg_match_all($re, $str, $matches);

$re = "/\{(.*?)\}/";
$str = "this is test {username} ,{password@123} and Other {asdfg@#\$}";

preg_match_all($re, $str, $matches);

print_r($matches);