PHP does not display error messages

To turn on errors at the script level, include at the top of your script:

ini_set('display_errors', 1);
error_reporting(~0);

Alternatively, if it is not a production site and simply a development / testing site, you can turn on error reporting in php.ini. Search it for these settings:

error_reporting  =  E_ALL
;error_reporting  =  E_ERROR
display_errors = On
;display_errors = Off