how to enable php error display code example

Example: How do I get PHP errors to display

//PHP functions
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

//.htaccess
php_flag display_startup_errors on
php_flag display_errors on
php_flag html_errors on
php_flag log_errors on
php_value error_log  /home/path/public_html/domain/PHP_errors.log