php - Get the id of selected option of select tag in symfony2 controller -


i have form 1 select tag. want id of selected option tag in controller when user submit form. form is

 <div class="one_third">         <form name="portfolios" action="{{ path('munichinnovationgroupbundle_portfolio') }}" method="post" >             <h2>select portfolio</h2>             <p>change portfolio managed:<br />                 <select name="portfolio" style="width: 265px; height:28px;">                     <option selected="selected" value="default">switch portfolio</option>                     {% portfolio in portfolios %}                         <option id={{ portfolio.id }}>{{ portfolio.portfolioname }}</option>                         {% endfor %}                 </select>             </p>             <p>                 <input style="margin-left:100px; height:26px; cursor:pointer; background-color: #2d9ad3 !important; border: 1px solid #067ebd; color: #ffffff; text-shadow: 0 -1px 0 #067ebd;" type="submit"class="button2 tooltip" value="switch">             </p>          </form>     </div>

in controller 

if($request->getmethod() == 'post'){         $data = $request->request->all();         //$portfolio_id = $data['portfolio_id'];         var_dump($data);         echo $data;         exit();     }

the var_dump($data) gives me this

array  'portfolio' => string 'umair portfolio 1' (length=17)  array

how can id ?

any suggestions?

thanks in advance

you must change attribute id value 

<option value={{ portfolio.id }}>{{ portfolio.portfolioname }}</option>

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