html - Creating post form with form name as holder -

how can create form form name container form posts.

this got:

array ( [sendername] => gsdfg [receiveraddress] => asdf [receiveremail] => asd@asd [xsize] => 2 [ysize] => 3 [zsize] => 4 [units] => cm [weight] => 22 ) 

but want is:

array ( [form] => array([sendername] => gsdfg [receiveraddress] => asdf [receiveremail] => asd@asd [xsize] => 2 [ysize] => 3 [zsize] => 4 [units] => cm [weight] => 22 )) 

(giving form name attribute doesnt resolve problem)

this html:

<form action="http://dev.playgroundwp.lv/?page_id=24" id="productform" method="post">                  <table>             <tbody><tr>                 <td>                     <label for="sender-name-input">your name*:</label>                                     </td>                 <td>                     <input type="text" name="sendername" value="" required="required" placeholder="enter name" id="sender-name-input">                 </td>             </tr>              <tr>                 <td>                     <label for="receiver-address-input">receiver address*:</label>                                     </td>                 <td><input type="text" name="receiveraddress" value="" required="required" placeholder="enter place" id="receiver-address-input">                  </td>             </tr>              <tr>                 <td><label for="receiver-email-input">receiver email*:</label>                                     </td>                 <td>                     <input type="email" name="receiveremail" value="" required="required" placeholder="enter email" id="receiver-email-input">                 </td>             </tr>              <tr>                 <td><label for="x-size-input">size*:</label>                                     </td>                 <td>                     <!-- type number nestrādās škiet uz ie < 9, jāskatās cik tālu nepieciešams supports -->                     <input type="number" placeholder="x" name="xsize" required="required" min="0" value="" step="0.01" id="x-size-input">                     <input type="number" placeholder="y" name="ysize" required="required" min="0" value="" step="0.01" id="y-size-input">                     <input type="number" placeholder="z" name="zsize" required="required" min="0" value="" step="0.01" id="z-size-input">                     <select name="units" placeholder="select units" id="units-input">                         <option value="mm">mm</option>                         <option value="cm">cm</option>                         <option value="m">m</option>                     </select>                 </td>             </tr>             <tr>                 <td>                     <label for="weight-input">weight*:</label>                                     </td>                 <td>                     <input type="tel" placeholder="kg" name="weight" min="0" value="" step="0.01" required="required" id="weight-input">                 </td>             </tr>         </tbody></table>         <button type="submit" value="submitted">submit</button>     </form> 

how can achieve without using js?

there no connection between name of form (which should avoided in favour of id anyway) , data sends server.

if want php create associative array of values must give form controls names trigger that:

name="form[sendername]"