This class can be use to intercept and log PHP execution errors. It can enable PHP execution error logging setting the file that logs error messages. The class provides an error handler function that outputs a stack back-trace with the functions, arguments, file and lines of where an error occurs, as well the values of super-global variables $_GET, $_POST and $_FILES, and also the IP address of the current user accessing the site. The class may also enable of disable the output of error messages to Web pages and change the error reporting level.