Which constant provides the current working directory and file name in PHP?

The constant that provides the current working directory and the filename in PHP is FILE. When used within a script, FILE returns the full path and filename of the file that contains the constant. This is particularly useful for scripts that need to know their own location in order to include other files, require resources, or handle dependencies.

For example, if you reference FILE inside a PHP file called "example.php" located in "/var/www/html/", it would return the string "/var/www/html/example.php". This allows developers to create paths relative to the current file, which is especially helpful in modular PHP applications where script location can vary.

The other options do not serve this purpose. For instance, FILE_PATH is not a predefined constant in PHP. The ME constant is also not recognized, and SCRIPT is not a standard PHP constant either; the closest to script information is the $_SERVER['SCRIPT_FILENAME'] variable, but it is not the same as FILE. Hence, FILE distinctly stands out as the correct answer for obtaining the current working directory and file name.