How to find a substring in a string using a mask?

Question

PHP

Good evening everyone. Help to find the desired substring in the string.
Name options:
oikos_kreos-drape__kr115+an08
oikos_kreos-drape__kr115-an08
oikos_kreos-drape__kr115
oikos_kreos-drape
kreos-drape

Need to get kreos-drape
I try at least like this, but even that doesn't work:

$str = 'oikos_kreos-drape__kr115';
  if ( preg_match("/_\D__\D$/", $str, $sample_name) ){
    var_dump($sample_name);
  }

Thanks :)

Answer 1

https://regex101.com/r/4hR0RU/1