How to turn on error messages in magento 2 - magento2

Question

I have installed magento 2 and it working.I just created the Hello world module and it working now.
My issue was I had called non existing method in execute method.
While trying to get it to work I tried to load the page it shows blank white screen, but no error.
How do I get errors to display in magento2?

Answer 1

Add following code in index.php file :-
error_reporting(E_ALL);
ini_set('display_errors', 1);

Answer 2

Enabling Error reporting in magento2 is little tricky , as magento2 now comes with 3 different modes
Default
Developer
Production
Magento2 by default install in “default” mode and thats why you dont get the error log at the front-end of the site , that can a viewed at magento error log . You may check the complete details over here http://devdocs.magento.com/guides/v2.0/config-guide/bootstrap/magento-modes.html
How to enable developer mode in Magento2
This is must have if you are a developer and building extension and template for magento2 , magento provide a command for this purpose . Login in to your linux terminal and under magento execute
php bin/magento deploy:mode:set developer
and it will enable the developer mode under your magento instance for production mode you can set the mode to production or default .
still if you are experiencing in error reporting
you can give a try by renaming local.xml.sample to local.xml under
pub/errors

Answer 3

There is a place for this. In bootstrap.php, there is:
#ini_set('display_errors', 1);
Just uncomment that.

Answer 4

1) app/bootstrap.php, there is:
#ini_set('display_errors', 1);
Kindly uncomment that.
2) Run below commands
php bin/magento deploy:mode:set developer
php bin/magento cache:clean
php bin/magento cache:flush

Answer 5

To check current mode use:
bin/magento deploy:mode:show

Answer 6

Instead of editing index.php or app/bootstrap.php file, you can also edit the .htaccess file to enable PHP display errors settings.
Write the following lines of code at the end of the .htaccess file present in your Magento2 website's root directory:
## enable PHP's error display settings
php_value display_errors on
## set error display to E_ALL
php_value error_reporting -1
After that,
Open terminal
Go to your Magento's root directory
cd /path/to/your/magento/root/folder
Run the following command to enable developer mode:
php bin/magento deploy:mode:set developer
To check your current developer mode, you can run the command:
php bin/magento deploy:mode:show

Answer 7

Please Put the following code in index.php
ini_set('error_reporting', E_ERROR);
register_shutdown_function("fatal_handler");
function fatal_handler() {
$error = error_get_last();
echo("<pre>");
print_r($error);
}