PHP error_reporting

ini_set('display_errors',1); //Error message
ini_set('display_startup_errors',1); //php startup error message
error_reporting(-1); //Print out all error messages
ini_set('error_log ', dirname(__FILE__) . '/error_log.txt'); //Output the error message to a text file

The above has introduced PHP error_reporting, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.