strip_tags和trim不能一起工作

I need some help. I want to extract html tags and spaces, but this code not working. Where is my fault

Code in usage;

$ozellikpar = $ozellikler1[0]; 
echo strip_tags (trim($ozellikpar[13]));

Output;

<option value="">      Deneme</option>

But must be;

<option value="">Deneme</option>

Thank you.

You have to use

echo trim(strip_tags ($ozellikpar[13]));