Added else argument to ifPresent

[petrknap]

• This pull request does not contain any breaking change.
• I asked the AI to briefly summarize, use and improve the feature(s), and I'm okay with the output:

Could you briefly summarize the following code for me?

OptionalResource::ofFalsable(tmpfile())->ifPresent(function ($tmpFile): void {
    fwrite($tmpFile, 'data');
    fclose($tmpFile);
}, else: fn () => print('tmpfile() failed'));

Certainly! This PHP code snippet demonstrates the use of an OptionalResource to handle a potentially false value returned by tmpfile(). Here's a breakdown:

1. OptionalResource::ofFalsable(tmpfile()) wraps the result of tmpfile() in an OptionalResource object.
2. The ifPresent method takes two arguments: a function to execute if the tmpfile() was successful, and an alternative function if it failed.
3. If the tmpfile() is successful, it writes the string 'data' to the temporary file and then closes it.
4. If the tmpfile() fails, it prints 'tmpfile() failed'.

So, in short, this code snippet ensures that appropriate actions are taken based on whether tmpfile() succeeds or fails. Let me know if you need further details!