Question

I trying to make a select that should be post and contain all the votacoes from an user

  <select name="votacao" size="1">

     <option>

       <?php
         $sql = "SELECT nome_votacao FROM votacoes WHERE user_id = $_SESSION['id']";
         $rs = mysql_query($sql);                       
         while($row = mysql_fetch_row($rs)) 
             echo $row['nome_votacao'];             
       ?>   

    </option>

</select>

Answer 1

Your <option> needs to be in your loop:

<select name="votacao" size="1">


       <?php
         $sql = "SELECT nome_votacao FROM votacoes WHERE user_id = $_SESSION['id']";
         $rs = mysql_query($sql);                       
         while($row = mysql_fetch_row($rs)) {
             echo sprintf("<option>%s</option>\n", $row['nome_votacao']);  
         }      
       ?>   



</select>

You probably need to also add a unique ID as the value attribute for each <option> for this to be truly useful.