joomla - How can i make custom form module joomla3.x -

<select name="a">    <option value="1">volvo</option>    <option value="2">saab</option>  </select>  <select name="b">    <option value="1">test1</option>    <option value="2">test2</option>  </select>  <input type="submit" >

after submit, want show result , b. example:

if($_post['a']==1 && $_post['b']==2){     echo 'true';  }else{     echo '0';  }  

is possible in joomla?

you have enclosed input fields form tag. example

<form method="post"> <select name="a">   <option value="1">volvo</option>   <option value="2">saab</option> </select> <select name="b">   <option value="1">test1</option>   <option value="2">test2</option> </select> <input type="submit" > </form> 

hope help