What is the function __FILE__ used for in PHP and how can it be utilized for debugging purposes?

The __FILE__ constant in PHP returns the full path and filename of the current script. It can be useful for debugging purposes to track the location of the script being executed. By using __FILE__ in combination with other debugging techniques like error logging or outputting messages, developers can gain insights into the flow of their code and identify issues more effectively.

// Example of utilizing __FILE__ for debugging purposes
echo "Current script file: " . __FILE__;