Yii2 trim everything on save
<p>Yii2 framework. The idea to create common behavior for common model:</p>

<ul>
<li>before Validate trims all fields in model.</li>
<li><p>if it's array trim all values in array.</p>

<ol>
<li><p>I'm wondered why in Yii2 core doesn't exist such possibility. Or I'm wrong. Am I?</p></li>
<li><p>What problems could I face if I trim all fields?</p></li>
</ol></li>
</ul>