Using the Pixel & Tonic Contact Form plugin, I added a config file (config/contactform.php) to override plugin settings from the CP.

I would like to change some settings if devMode is enabled : recipients from the contact form plugin, to separate my tests addresses from my client addresses.


$recipients = array(
    'devMode' => '[email protected],[email protected]',
    'prodMode' => '[email protected],[email protected]'

if (devMode == true) {
    $recipients = $recipients['devMode'];
} else {
    $recipients = $recipients['prodMode'];

return array(
    'toEmail' => ($recipients ?: null),

How can I check if devMode == true? Can I access to this value using craft()->config or something else that?

4 Answers 4


It's as simple as

if ( craft()->config->get( 'devMode' ) )
 //do stuff
  • Using this, I get this error : The property « Craft\ConfigService.devMode » is undefined.. Yes, I'm using environment variables, but following the other answer there is no devMode data that I can get from the craft()->config->get('environmentVariables'), while devMode is enabled in my current dev environment.
    – Romain P.
    Commented Jun 29, 2016 at 8:34
  • This is because you're not in the Craft namespace. Included in most files is a namespace Craft; declaration at the top of the file, but in config files this is not usually there. You could either add this namespace declaration to your config file, or use \Craft\craft()->config->devMode instead. Commented Jun 29, 2016 at 8:37
  • namespace Craft; was already specified at the first line of my config/contactform.php file.
    – Romain P.
    Commented Jun 29, 2016 at 8:39
  • Ok, I found the solution : craft()->config->get('devMode') does the job. Thank you !
    – Romain P.
    Commented Jun 29, 2016 at 8:41
  • 2
    Oh I see, I misread the original error. I'm pretty sure you need to use craft()->config->get('devMode') instead Commented Jun 29, 2016 at 8:41

For those coming here using Craft 3, it's now Craft::$app->getConfig()->general->devMode.


Since Craft 4.0, the recommended method to test if Craft is running in dev mode from the PHP layer is App::devMode():

use craft\helpers\App;

$devMode = App::devMode();

Apart from App::devMode() being faster (and less verbose to type), the big difference between it and Craft::$app->getConfig()->getGeneral()->devMode is that the latter will simply return whatever value the devMode config setting is currently set to, whereas App::devMode() will tell you if Craft is actually running in dev mode or not, by returning the value for the YII_DEBUG constant.

In practice, the values for the devMode config setting and the YII_DEBUG constant will almost always be the same - but not necessarily, and there are edge cases where the nuance between the two can make a difference.

Internally, Craft uses App::devMode() in most cases.

If working in Twig, App::devMode() is not available, but the global devMode variable can be used instead, which will return the same thing (i.e. the YII_DEBUG constant's value):

{% if devMode %}
   We are debuggin'
{% endif %}

For those coming here >= Craft 3.5, it's now


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