PHP production server – turn on error messages

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To enable errors, you must use error_reporting before the point where those are triggered (for example, at the beginning of your PHP script) :

error_reporting(E_ALL);

And to have the error displayed, you should configure display_errors :

ini_set('display_errors', 'On');

(This one should be disabled on a production server, which means you might have to enable it this way, even after having configured error_reporting)

Of course, all this can be encapsulated in an if block, to make sure only you can see the error messages — especially if you are doing this on a live production website ; for instance :

if ($_SESSION['is_admin'])
{
    error_reporting(E_ALL);
    ini_set('display_errors', 'On');
}

And to get things a bit prettier, you might also want to configure html_errors :

ini_set('html_errors', 'On');

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