Is it possible to set a custom server variable so that it may be used
in the latter part of a script? Say something like $_SERVER["myvar"] =
"myvalue", and then be able to use 'myvar' later.
The reason being that I want some client-side information to flow to
PHP, and the PHP script flow will be controlled depending on this
information.
[snippet]
<?php
if ($_REQUEST["action"] == "setvar")
{
$_SERVER["WindowName "] == $_REQUEST["window"];
exit ();
}
?>
<HTML>
<HEAD>
<SCRIPT TYPE="TEXT/JAVASCRIPT">
var xmlhttp = new ActiveXObject(" Microsoft.XMLHT TP");
var request =
"http://saraswati.tally solutions.com/tallyweb/test/TestRithishGene ric.php?action= setvar&window=" +window.name;
xmlhttp.open("P OST", request, false);
xmlhttp.send();
response = xmlhttp.respons eText;
</SCRIPT>
</HEAD>
<BODY>
<?php
if ($_SERVER["WindowName "] == "x") { ... do this ... }
else { ... do that ... }
?>
</BODY>
</HTML>
[/snippet]
Basically, the execution flows depending on which window the file is
being invoked in. I guess I could use sessions for this. However, I
wanted to know if there were any alternative to sessions. Setting &
Getting a server variable would be that much more simple.
And before I am flamed, the app is being developed for our intranet,
and hence you see the usage of ActiveXObject(" Microsoft.XMLHT TP")
Suggestions / comments / even flamings solicited.
Regards,
Rithish.
6  12858  ri*****@gmail.c om wrote: Is it possible to set a custom server variable so that it may be used
in the latter part of a script? Say something like $_SERVER["myvar"] =
"myvalue", and then be able to use 'myvar' later.
Yes, you can do that, however once the script ends, the variable is
gone. If you want to do it across requests you'll need to use sessions
or some other storage method (database, files, etc.)
If you want to set a server "variable" it acts more like a constant. For
instance, if you use Apache and have done something like:
SetEnv apache_var1=34
Then in (all) your php scripts, $_SERVER['apache_var1'] == 34
You cannot do something like $_SERVER['apache_var1'] = 63 and have the
next request produce that value...
--
Justin Koivisto, ZCE - ju****@koivi.co m http://koivi.com ri*****@gmail.c om wrote: Is it possible to set a custom server variable so that it may be used
in the latter part of a script? Say something like $_SERVER["myvar"] =
"myvalue", and then be able to use 'myvar' later.
You could, but I would advice you against to do a such thing, as you will most
likely get trouble to see from where the value comes when you are to debug
your code a long time later or it can be someone else who does the debugging.
Use a normal global value instead, like
$myvalue = "myvalue";
The reason being that I want some client-side information to flow to
PHP, and the PHP script flow will be controlled depending on this
information.
[snippet]
<?php
if ($_REQUEST["action"] == "setvar")
{
$_SERVER["WindowName "] == $_REQUEST["window"];
exit ();
}
This don't make any sense, you assign a value to an array and then exit the
script and you loose the value at the same time.
Basically, the execution flows depending on which window the file is
being invoked in. I guess I could use sessions for this. However, I
wanted to know if there were any alternative to sessions. Setting &
Getting a server variable would be that much more simple.
The alternative to sessions are called cookies, but it's really not an
alternative as sessions usually are cookies.
And before I am flamed, the app is being developed for our intranet,
and hence you see the usage of ActiveXObject(" Microsoft.XMLHT TP")
Your loss, not mine...
J.O. Aho wrote:
The alternative to sessions are called cookies, but it's really not an
alternative as sessions usually are cookies.
Sessions are not usually cookies... The session id is usually sent via a
cookie. The session data is usually stored in a file or database on the
server.
--
Justin Koivisto, ZCE - ju****@koivi.co m http://koivi.com
rith...@gmail.c om wrote:
Is it possible to set a custom server variable so that it may be used
in the latter part of a script? Say something like $_SERVER["myvar"] =
"myvalue", and then be able to use 'myvar' later.
What's wrong with a session variable? Set $_SESSION["myvar"] =
"myvalue",
and use it later.
Cheers,
NC
>Is it possible to set a custom server variable so that it may be used in the latter part of a script? Say something like $_SERVER["myvar"] =
"myvalue", and then be able to use 'myvar' later.
You can't make changes to $_SERVER and have them stick in subsequent
invocations of PHP. And even if you could, you wouldn't want to,
especially for this application.
The reason being that I want some client-side information to flow to
PHP, and the PHP script flow will be controlled depending on this
information.
You want client-side information to flow from MY browser to PHP,
and from there control the script flow for ME, YOU, THE POPE, and
PRESIDENT BUSH? In the current political environment, that may
make you guilty of treason. I hope this information does not contain
credit card numbers or nuclear launch codes.
<?php
if ($_REQUEST["action"] == "setvar")
{
$_SERVER["WindowName "] == $_REQUEST["window"];
exit ();
}
?>
<HTML>
<HEAD>
<SCRIPT TYPE="TEXT/JAVASCRIPT">
var xmlhttp = new ActiveXObject(" Microsoft.XMLHT TP");
var request =
"http://saraswati.tally solutions.com/tallyweb/test/TestRithishGene ric.php?action= setvar&window=" +window.name;
xmlhttp.open(" POST", request, false);
xmlhttp.send() ;
response = xmlhttp.respons eText;
</SCRIPT>
</HEAD>
<BODY>
<?php
if ($_SERVER["WindowName "] == "x") { ... do this ... }
else { ... do that ... }
?>
</BODY>
</HTML>
[/snippet]
Basically, the execution flows depending on which window the file is
being invoked in. I guess I could use sessions for this. However, I
wanted to know if there were any alternative to sessions. Setting &
Getting a server variable would be that much more simple.
No, setting and getting a server variable would be really, really
messy. Have you ever thought about what a grocery store would be
like if each store had exactly ONE cart, and all customers had to
share it? Oh, yes, your customers DON'T have unique identification,
like driver's license numbers, names, IP address, or whatever.
How do you propose for this to work when you've got 500 simultaneous
users? (Sessions are a good way of letting each user have his
own set of variables.)
Variables passed in a URL as you show above show up in $_GET or
$_POST (and $_REQUEST). It seems like you are using the variable
in the same page fetch as retrieving it, in which case why bother
with "server variables"?
And before I am flamed, the app is being developed for our intranet,
and hence you see the usage of ActiveXObject(" Microsoft.XMLHT TP")
Suggestions / comments / even flamings solicited.
Gordon L. Burditt
I think you'll be better served by having two separate scripts
altogether, as you seem to have two distinct execution paths. It
doesn't make sense to make the decision on which fork to take yet
postpone the actual divergence.
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