javascript - Why the values of checked elements from select control are not coming in $_POST array after submission of form? -

this question has answer here:

• how multiple selected values of select box in php? 10 answers

i've following html code:

<form action="rebates.php" role="form" method="post"> <select id="example28" multiple="multiple" name="applicable_states">     <option value=""  selected='selected'>select unit</option>     <option value="1" >alabama</option>     <option value="2" >alaska</option>     <option value="3" >arizona</option>     <option value="4" >arkansas</option>     <option value="5" >california</option>  </select> <button type="submit" class="btn btn-primary">preview</button> </form> 

the jquery code select control follows:

/*jquery code*/  $(document).ready(function() {     window.prettyprint() && prettyprint();      $('#example28').multiselect({          includeselectalloption: true,          maxheight: 150      });  }); 

i've used bootstrap's js , css (multiselect , prettify) achieve this. issue i'm not getting checked elements' values after submission of form in $_post array oe rebates.php. can please me in regard? in advance. when check values select control , submit form i'm getting $_post array follows:

array (  [applicable_states] => 11  [multiselect] => 11 ) 

why happening? code in rebates.php follows:

<?php print_r($_post); die; ?> 

php needs know it's array. need change name of select.

name="applicable_states[]"