The getid3_lib::mb_basename() method calls the PHP native basename() function, the second parameter of which is the optional$suffix parameter which expects a string.
A parameter being optional, however, does not automatically make it nullable.
As of PHP 8.1, passing null to a non-nullable PHP native function will generate a deprecation notice.
In this case, this function call yielded a basename(): Passing null to parameter #2 ($suffix) of type string is deprecated notice.
Changing the null default value for the $suffix parameter to an empty string fixes this for most cases without BC-break.
Leaving the deprecation warning in place for when calls to the function would pass null for the $suffix so they can adjust their function call.
The
getid3_lib::mb_basename()method calls the PHP nativebasename()function, the second parameter of which is the optional$suffixparameter which expects astring.A parameter being optional, however, does not automatically make it nullable.
As of PHP 8.1, passing
nullto a non-nullable PHP native function will generate a deprecation notice. In this case, this function call yielded abasename(): Passing null to parameter #2 ($suffix) of type string is deprecatednotice.Changing the
nulldefault value for the$suffixparameter to an empty string fixes this for most cases without BC-break. Leaving the deprecation warning in place for when calls to the function would passnullfor the$suffixso they can adjust their function call.Refs: