Which constant would you use to get information about the current script being executed?

To obtain information about the current script being executed in PHP, the correct choice is the constant that represents the full path and filename of the current script. The FILE constant provides this functionality, making it invaluable for debugging, logging, or configuring paths relative to the executed file. Whenever FILE is used within a script, it will return the absolute path, allowing developers to understand exactly which file is running at any point in time.

In comparison, while SCRIPT might seem like a viable option, it is not a predefined magic constant in PHP. Similarly, DIR returns the directory of the current file rather than the full path including the filename, which makes it less useful for obtaining complete script information. Lastly, get_current_script() is not a built-in PHP function, so it cannot be used for this purpose. Thus, utilizing FILE is the most effective way to identify the currently executing script.