单击按钮时，重新加载页面/表单以刷新数据

Question

How to reload the page or form in PHP.

The scenario: I have two forms with the same design/gui. I named it main.php and process.php. Both page also have dropdownlist, same items. The items in the dropdownlist are "Net 1" and "Net 2" and under of "Net 1" is "Bldg 1" and for "Net 2" is "Bldg 2". So in the main.php when I click the submit it will proceed to the process.php. Then process.php will display the under item of the item I choose in the dropdownlist in main.php.

My problem is: When the user want to see the under item of "Net 2". I want is, in the page of button_process.php will just reload or refresh the data so that the user will see the items for "Net 2", what should I do?

Code for main.php:

    <form action="process.php" method="post">
 Advertisement Name: <input type="text" name="adName" size="50"><br/><br/>
 Duration: <select id="duration"name="duration">
     <option value="5 s" >5 s</option>
         <option value="10 s" >10 s</option>
    <option value="15 s" >15 s</option>
    <option value="20 s" >20 s</option>
    <option value="30 s" >30 s</option>
    <option value="60 s" >60 s</option>
    </select><br/><br/>
    <b>Period</b>  <br/>
     From: <input type="text" id="datepickerfrom"name="from"> To: <input type="text" id="datepickerto"name="to">

    <span id="span_select">
        <select name="id">
            <option value="" >- select -</option>

            <?php
                include 'connect.php';

                $q = mysql_query("select fldNetname from tblnetwork");

                while ($row1 = mysql_fetch_array($q))
                {
                  echo "<option value='".$row1[fldNetname]."'>".$row1[fldNetname]."</option>";

                }
            ?>
        </select>
    </span>
    <input type="submit" name="pass" value="View Building/s">   
    </form>
Here's my Code for 

process.php: EDIT:

<form action="button_process.php" method="post">
echo "<div><input type='checkbox' class='checkall'> Check all</div>";
    $all = mysql_query("SELECT fldBldgName FROM tblbuildings");
    while ($row = mysql_fetch_array($all))
       {

       echo "<div><input type='checkbox' name='play[]' class='chk_boxes1' value='" . $row['fldBldgName']."'>";
       echo $row['fldBldgName'];"</div>";

       }


<input type="submit" name="pass" value="View Building/s">   
</form>

Code for button_process.php

<?php
include("connect.php");

switch ($_POST['pass']) {
      case 'View':
           //here I want to reload the page.
            break;


      case 'Save':
            echo "Add";
            break;
}

?>

Answer 1

If reloading the page requires a user action, you will not be able to use PHP to reload the page, in this case, you would have to use Javascript.

If you want to reload a page using PHP, which will happen as the page load and before any html code is outputted, you can use this :

header('Location: '.$_SERVER['REQUEST_URI']);

If you want to refresh the page after the user has executed an action, you will need a javascript event method on an element (for exemple, onclick() on a button), and within the method you can use the following code :

window.location.reload();

If this isn't sufficient to answer your question, please provide more details as to what you want to do. There is a better way to do it than what you are doing, with more details we might be able to help you more.