Пример скрипта на PHP

/*
 * -------------------------------------------------------------------
 *  Now that we know the path, set the main path constants
 * -------------------------------------------------------------------
 */
        // The name of THIS file
        define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));
        // The PHP file extension
        // this global constant is deprecated.
        define('EXT', '.php');

/*
 * -------------------------------------------------------------------
 *  Now that we know the path, set the main path constants
 * -------------------------------------------------------------------
 */
        // The name of THIS file
        define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));
        // The PHP file extension
        // this global constant is deprecated.
        define('EXT', '.php');