ini_set('display_errors, 1); error_reporting(E_ALL);
The ini_set function sets a configuration option for the duration of the script execution. When the script is done, the value returns to whatever it was set to originally in the ini file.
The error_reporting function sets the error level to report during the execution of the script.
Here are some of the error levels:
You can also report all errors with E_ALL, as shown above.
How to enable PHP error reporting