Dependent Dropdown with POST

Question

Hi (Gunter Hi again if it's you that answers this)
<br />
<br />I have a dependent dropdown on page with 3 selects (working fine) that needs to pass 3 parameters to a page manage_sections.php and the params are ClientID, ProjectID and SectionID respectively.
<br />
<br />Here is my form:-
<br />
<br />--------
<br />
<br />
<form action="manage_sections.php" method="get" name="remove" target="_parent">
<br />
<span class="textcol4">1.&#160;</span>
<select name="ClientID" id="ClientID">
<option value="">select client</option><?php<br />do {  <br />?>
<option value="<?php echo $row_RsClients['ClientID']?>">
<?php echo $row_RsClients['ClientName']?>
</option><?php<br />} while ($row_RsClients = mysql_fetch_assoc($RsClients));<br />  $rows = mysql_num_rows($RsClients);<br />  if($rows > 0) {<br />      mysql_data_seek($RsClients, 0);<br />   $row_RsClients = mysql_fetch_assoc($RsClients);<br />  }<br />?>
</select>
<br />
<label>
<br />
<br />
<span class="textcol4">2.&#160;</span>
<select name="ProjectID" id="ProjectID" wdg:subtype="DependentDropdown" wdg:type="widget" wdg:recordset="RsProjects" wdg:displayfield="ProjectName" wdg:valuefield="ProjectID" wdg:fkey="ProjectClientID" wdg:triggerobject="ClientID" wdg:selected="">
<option value="">select project</option>
</select>
<br />
<br />
<br />
<label>
<br />
<span class="textcol4">3.&#160;</span>
<select name="SectionID" id="SectionID" wdg:subtype="DependentDropdown" wdg:type="widget" wdg:recordset="RsSections" wdg:displayfield="SectionName" wdg:valuefield="SectionID" wdg:fkey="SectionProjectID" wdg:triggerobject="ProjectID">
<option value="">select section</option>
</select>
<br />
</label>
<br />
<a href="javascript:void(0)">
<img src="../Nitobi/Assets/style/treegrid/flex/refresh.gif" alt="refresh" width="16" height="14" hspace="4" border="0" onclick="window.location.reload()" />
</a>
<br />
<label>
<br /> &#160;&#160;&#160;&#160;
<input type="submit" class="btn1" value="GO" />
<br /></label>
<br /></label></form>
<br />
<br />-----------
<br />To submit the IDs I have found the only way I can figure is to use 'GET' form action and manually add the dropdown IDs to be the same as the ID I want to pass eg '
<select name="ClientID" id="ClientID"></select>

Answer 1

Hi Glennboy,
<br />
<br />regretfully there´s no way to hide URL parameters from the browser´s address bar, but there are ways to protect the originally passed $_GET values -- it´s done by storing them in Session Variables and check these ones against subsequent changes.
<br />
<br />Out of curiosity - and also because this is a serious issue to many folks here - I´ve just been experimenting a little, and I´d like you to try the following approach:
<br />
<br />1. create a simple "parameters.php" page which just contains a link to "check.php" -- and append some static dummy values to this link, e.g. "check.php?ClientID=53&amp;ProjectID=15&amp;SectionID=25"
<br />
<br />2. create the page "check.php", and in here paste the following PHP/HTML code:
<br />
<br />-----------
<br /><?php<br />session_start();  <br />if(isset($_SESSION['views']))<br />    $_SESSION['views'] = $_SESSION['views']+ 1;<br />else<br />    $_SESSION['views'] = 1;<br />?>
<br />
<br /><?php<br />if(!empty($_GET['ClientID']) && (is_numeric($_GET['ClientID'])) && ($_SESSION['views'] == 1) ){<br />$session_ClientID = $_GET['ClientID'];<br />$_SESSION['session_ClientID'] = $session_ClientID;<br />}<br /><br />if(!empty($_GET['ProjectID']) && (is_numeric($_GET['ProjectID'])) && ($_SESSION['views'] == 1) ){<br />$session_ProjectID = $_GET['ProjectID'];<br />$_SESSION['session_ProjectID'] = $session_ProjectID;<br />}<br /><br />if(!empty($_GET['SectionID']) && (is_numeric($_GET['SectionID'])) && ($_SESSION['views'] == 1) ){<br />$session_SectionID = $_GET['SectionID'];<br />$_SESSION['session_SectionID'] = $session_SectionID;<br />}<br />?>
<br />
<br /><?php<br />// 1. checking the Session Variable "session_clientID"<br />if (isset($_SESSION['session_ClientID']) && ($_SESSION['session_ClientID'] == $_GET['ClientID'] ) ) {<br />$check_ClientID = "has not been faked";<br />$valid_ClientID = 'Y';<br />}<br />else {<br />$check_ClientID = "has been faked to <b>".$_GET['ClientID']."</b>";<br />$valid_ClientID = 'N';<br />}<br /><br />// 2. checking the Session Variable "session_projectID"<br />if (isset($_SESSION['session_ProjectID']) && ($_SESSION['session_ProjectID'] == $_GET['ProjectID'] ) ) {<br />$check_ProjectID = "has not been faked";<br />$valid_ProjectID = 'Y';<br />}<br />else {<br />$check_ProjectID = "has been faked to <b>".$_GET['ProjectID']."</b>";<br />$valid_ProjectID = 'N';<br />}<br /><br />// 3. checking the Session Variable "session_sectionID"<br />if (isset($_SESSION['session_SectionID']) && ($_SESSION['session_SectionID'] == $_GET['SectionID'] ) ) {<br />$check_SectionID = "has not been faked";<br />$valid_SectionID = 'Y';<br />}<br />else {<br />$check_SectionID = "has been faked to <b>".$_GET['SectionID']."</b>";<br />$valid_SectionID = 'N';<br />}<br />?>
<br />
<br />The original ClientID value is
<b>
<?php echo $_SESSION['session_ClientID']; ?>
</b> and <?php<br />echo $check_ClientID; ?>
<br />
<br />
<br />
<br />The original ProjectID value is
<b>
<?php echo $_SESSION['session_ProjectID']; ?>
</b> and <?php<br />echo $check_ProjectID; ?>
<br />
<br />
<br />
<br />The original SectionID value is
<b>
<?php echo $_SESSION['session_SectionID']; ?>
</b> and <?php<br />echo $check_SectionID; ?>
<br />-----------
<br />
<br />You will see that any subsequent changes of the initially stored $_GET values will return a "has been faked to..." message for each URL variable, and I think that´s quite fine for a start ;-)
<br />
<br />Cheers,
<br />Günter Schenk
<br />Adobe Community Expert, Dreamweaver