Errors and compatibility problems using session in WML....

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January 2nd, 2006, 12:54 AM

utsboy

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Location: Jakarta

Posts: 16

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Errors and compatibility problems using session in WML....

Dear Guys,
I 've found out some errors and compatibilty issues when testing and implemented session in wml.
When I implemented session in WML and displaying link with reference, some phones can not display it and reply no gateway information.
Especially old phones which not xHTML enable. And when I tested using WML browser or other phones with xHTML enable with it, it's oke and displayed it correctly.
Is that an compatibilities issues about this...??
Or anyone have same experiences about this.. please share it with me.
I would very appreciate for any response from you guys...

This is my test wml script :
cre_sesi.php (create session)

<?session_register("var_x");?>
<?session_register("var_x");?>
<?php
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>

<wml>
<card id="Session" title="Session Trial">

<?
$var_x = "123456";
print ("Session : " . session_id() . " ");
print ("Inside session : $var_x");
$value = "10";
$link = "<a href='ba_sesi.php?sendv=$value'><Read Session></a>";
echo $link;
?>

</card>
</wml>

re_sesi.php (read session)

<?session_start();?>
<?php
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>

<wml>
<card id="Read" title="Read Sesion">

<?
$sendv=$HTTP_GET_VARS['sendv'];
$var_x = $_SESSION["var_x"];
print ("SID : " . session_id() . " ");
print ("Values : $var_x");
echo " $sendv";
$link = "<a href=\"ba_sesi2.php?sendv=$sendv\"><Read Session></a>";
echo $link;
?>

</card>
</wml>

Regards,
Utsboy

January 3rd, 2006, 06:37 AM

jabba_29

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Please use PHP tages, not PHPNET

Don't have much time to scan what the porblem is, but you are using old PHP and you don't have sessions_start on the first page. You may also be outputting stuff to the device before all headers are sent.
For example:

wml Code:

Original - wml Code
<?session_register("var_x");?> <?session_register("var_x");?> <?php header("Content-type: text/vnd.wap.wml"); header("Pragma: no-cache"); echo "<?xml version=\"1.0\"?>"; echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\"" . " \"http://www.wapforum.org/DTD/wml_1.1.xml\">"; ?>


<?session_register("var_x");?>
<?session_register("var_x");?>
<?php
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>

This snippet may be getting confused by the usage of short tags (<?)
and you also session_register twice (note that
unless you are using pre-4.2 PHP, this is out-dated method) and
perhaps a gap between the ? and the actual PHP would help...

You don't have session_start() which is the correct way to start the session.

wml Code:

Original - wml Code


<?php
session_start();
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
$_SESSION["var_x"] = "123456";
$var_x = $_SESSION["var_x"];
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>
<wml>
<card id="Session" title="Session Trial">
<p>
<?php
print ("Session : " . session_id() . "<br/>");
print ("Inside session : $var_x");
$value = "10";
$link = "<a href='ba_sesi.php?sendv=$value'><Read Session></a>";
echo $link;
?>
</p>
</card>
</wml>

This link also points to a page that you haven't given code for

If the link is re_sesi.php, then that should be something like:

wml Code:

Original - wml Code


<?php
session_start();
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
$var_x = $_SESSION["var_x"];
$sendv=$_GET['sendv'];
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>

<wml>
<card id="Read" title="Read Sesion">
<p>
<?php
print ("SID : " . session_id() . "<br/>");
print ("Values : $var_x");
echo "<br/>$sendv";
$link = "<a href=\"ba_sesi2.php?sendv=$sendv\"><Read Session></a>";
echo $link;
?>
</p>
</card>
</wml>

Hope this helps a bit.

__________________
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January 3rd, 2006, 09:09 PM

utsboy

Registered User

Join Date: Sep 2004

Location: Jakarta

Posts: 16

Time spent in forums: 11 h 22 m 26 sec
Reputation Power: 0

Still not works in the old phone...

Dear Jabba,
Thx for the immediate response from you Jabba, Iam very appreciate it.
Btw Jabba, I have already tried your suggestion but actually the result is still the same, it is works only in wap browser or newer version of phones with xhtml option available but not in the old version of phones which not xhtml available and it's replied "no gateway".
I thing the problem is in the entity reference of the links, because when I hide the links in cre_sesi.php, it works but still can not pass some information to other page like (entity - reference functions) below :

PHP Code:


		
			
<?php

session_start();

header("Content-type: text/vnd.wap.wml");

header("Pragma: no-cache");

$_SESSION["var_x"] = "123456";

$var_x = $_SESSION["var_x"];

echo "<?xml version=\"1.0\"?>";

echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""

   . " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";

?>



<wml>

    <card id="Session" title="Session Trial">

        <p>

<?

print ("Session : " . session_id() . "<br/>");

print ("Inside session : $var_x");

$value = "10";

<span class="highlight">//$link = "<a href='ba_sesi.php?sendv=$value'><Read Session></a>";

//echo $link;</span>

?>

              </p>

        </card>

</wml>

Do anyone knows what caused this, or session its only works in XHTML not in WML.

I would very appreciate for any response, thx in advance.

Best Regards,
Utsboy

Quote:

Originally Posted by utsboy

This is my test wml script :
cre_sesi.php (create session)

<?session_register("var_x");?>
<?session_register("var_x");?>
<?php
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>

<wml>
<\card id="Session" title="Session Trial">

<?
$var_x = "123456";
print ("Session : " . session_id() . " ");
print ("Inside session : $var_x");
$value = "10";
$link = "<a href='ba_sesi.php?sendv=$value'><Read Session></a>";
echo $link;
?>

</card>
</wml>

re_sesi.php (read session)

<?session_start();?>
<?php
header("Content-type: text/vnd.wap.wml");
header("Pragma: no-cache");
echo "<?xml version=\"1.0\"?>";
echo "<!DOCTYPE wml PUBLIC \"-//WAPFORUM//DTD WML 1.1//EN\""
. " \"http://www.wapforum.org/DTD/wml_1.1.xml\">";
?>

<wml>
<card id="Read" title="Read Sesion">

<?
$sendv=$HTTP_GET_VARS['sendv'];
$var_x = $_SESSION["var_x"];
print ("SID : " . session_id() . " ");
print ("Values : $var_x");
echo " $sendv";
$link = "<a href=\"ba_sesi2.php?sendv=$sendv\"><Read Session></a>";
echo $link;
?>

</card>
</wml>

Regards,
Utsboy

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