php mapscript persistance across requests

[Paul Spencer]

John,

here's three different approaches you might consider using

1. hidden HTML inputs
2. session variables
3. saving the entire map file

You will probably need to use a combination of these ... each one is
only an example, you'll need to do some work to figure out how to use it
in your setup ...

Cheers

Paul

--


1. Hidden HTML variables

<?php
if (isset($_REQUEST['extents']) && $_REQUEST['extents'] != '')
{
     $aExtents = explode( ',', $_REQUEST['extents'] );
     if (count($aExtents) == 4)
     {
         $oMap->extents->setextent( $aExtents[0], $aExtents[1],
                                    $aExtents[2], $aExtents[3] );
     }
}

//some processing

?>

<input type="hidden" name="extents" value="<?php echo implode( ",",
$oMap->extents)?>">

use the same approach (html hidden variables) for all other information


2. Session variables


<?php
if (isset($_SESSION['extents']) && $_SESSION['extents'] != '')
{
     $oMap->extents->setextent( $_SESSION['extents'][0],
                                $_SESSION['extents'][1],
                                $_SESSION['extents'][2],
                                $_SESSION['extents'][3] );
}

//some processing

$_SESSION['extents'] = $oMap->extents;

and use the same approach for all other information


3. Save map file ...


<?php
if (isset( $_SESSION['previousState'] ))
{
     $oMap = ms_newMapObj( $_SESSION['previousState'],
                           $_SESSION['originalLocation'] );
}

//some processing

$oMap->save( $tempFile );
$_SESSION['previousState'] = $tempFile;
?>


Jon Saints wrote:
> I Am new to php mapscript. Is there any standard way
> of storing map extent and layer information across
> http requests in phpmapscript?
>
> I realize that storing the map object in the session
> is not possible.  What are my other options?
>
> Thanks
>

--
+-----------------------------------------------------------------+
|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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