如何在阵列中多次发布？

Question

This my code. How this multiselect values with array to post modelseardh.php

<p>
     <label>Country:</label>
     <select  multiple="multiple" name="country[]" class="qs_carlocation1                              carlocations" onChange="jsFunction()" id="selectOpt">
       <?php
            $sql_se = mysql_query('select * from `country`');
            while($se = mysql_fetch_assoc($sql_se)) {
           ?>
           <option value = "<?php echo $se['id'];?>"><?php echo $se['country'];</option>
          <?php
            }
           ?>                       
           </select>
        </p>    `         
          <p id="change_form">
             <label>Mark:</label>
              <select  multiple="multiple"name="search_mark[]"class="qs_carlocation1 carlocations" >
            <?php
               $sql_search_mark = mysql_query('select * from `mark`');
               while($smark = mysql_fetch_assoc($sql_search_mark)) {
             ?>
         <option value="<?php echo $smark['id'];?>"><?php echo $smark['name'];?></option>
            <?php
               }
             ?>
            <script>
              function jsFunction(){
              var select = document.getElementById("selectOpt").value;
               $.post( 
                "modelsearch.php",
                {
                  id: "" + select + ""
                },
                 function(data) 
                 {
                   $('#change_form').html(data);
                 }
                );
              }
                </script>                           
              </select>
             </p>       

             <?PHP
                //this modelsearch.php
               include('../db.php');
                $id = $_POST['id'];
               ?>

Answer 1

There's wrong with enclosing & misplaced tag in the following line that possibly make the rendering ouput fails:

 <option value = "<?php echo $se['id'];?>"><?php echo $se['country'];"></option>

which is missing ?>"> right before the </option>, and you need to remove "> between ?> <?php it should be :

<option value = "<?php echo $se['id'];?><?php echo $se['country'];?>"></option>

and you also don't ouput any values between <option> xxx </ouput>, so the value attribute is assigned in the <option> but nothing to be ouput. I meant that xxx to be output

and FYI , you dont need to multiple echo the values, just concatenate the values :

 <option value = "<?php echo $se['id'] +""+ $se['country'];?>" ></option>