<p>Because that particular event is raised from <a href="http://buildwithcraft.com/classreference/etc/behaviors/AppBehavior" rel="nofollow">AppBehavior</a> (and therefore <a href="http://buildwithcraft.com/classreference/etc/web/WebApp" rel="nofollow">WebApp</a>), it doesn't follow the same <code>component.eventName</code> <a href="http://buildwithcraft.com/docs/plugins/events-reference" rel="nofollow">syntax</a> that the other Craft events use and you can't use <a href="http://buildwithcraft.com/classreference/etc/web/WebApp#on-detail" rel="nofollow">craft->on()</a> to register to listen to it.</p>

<p>You can register to listen to it through the traditional <a href="http://www.yiiframework.com/wiki/327/events-explained" rel="nofollow">Yii method</a>, though.  This should work for you:</p>

<pre><code>craft()-&gt;onEditionChange = function (Event $event) {
    craft()-&gt;womb-&gt;sendEvent($event);
};
</code></pre>

CC BY-SA 3.0
2015-08-27T22:04:40.463Z
2015-08-27T22:04:40.463Z
Brad Bell
<p>I'm trying to bind to the onEditionChange event with something like this:</p>

<pre><code>craft()-&gt;on('onEditionChange', function (Event $event) {
    craft()-&gt;womb-&gt;sendEvent($event);
});
</code></pre>

<p>However, i'm getting this error:</p>

<pre><code>Undefined offset: 1
</code></pre>

<p>Seems it expects an dot in there. Is there another way to bind to this event?</p>

<events>
Getting PHP error when trying to bind to onEditionChange event
# Getting PHP error when trying to bind to onEditionChange event

(Asked by: username_0 on 2015-08-27)

I'm trying to bind to the onEditionChange event with something like this:
craft()->on('onEditionChange', function (Event $event) {
    craft()->womb->sendEvent($event);
});

However, i'm getting this error:
Undefined offset: 1

Seems it expects an dot in there. Is there another way to bind to this event?

**Tags:** events


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## 1 answers

### Answer by username_1 on 2015-08-27. Score: 2 | Accepted answer

Because that particular event is raised from AppBehavior (and therefore WebApp), it doesn't follow the same component.eventName syntax that the other Craft events use and you can't use craft->on() to register to listen to it.
You can register to listen to it through the traditional Yii method, though.  This should work for you:
craft()->onEditionChange = function (Event $event) {
    craft()->womb->sendEvent($event);
};


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