Submit form with variable for action?

**Toby Inkster** · Sep 25 '05, 09:45 PM

Re: Submit form with variable for action?

tencip wrote:
[color=blue]
> <form action="http://www.mysite.com/admin/index.php" method="post"
> name="login" id="login" >
> <input name="usrname" type="text">
> <input name="pass" type="password" >
> <input name="domain" type="text">
> <input name="submit" type="submit" value="Login">
> </form>
>
> Now, the issue is, instead of the action I have now, I need the action
> to change based on what is typed by the user in the domain field.[/color]

Is method="post" set in stone?

If not, the easy solution is this:

<form action="somefil e.php" method="get">
<input name="usrname">
<input name="pass" type="password" >
<input name="domain">
<input type="submit" value="Login">
</form>

The form will *always* submit to "somefile.p hp", but then from
somefile.php we redirect to the correct location:

<?php
$url = sprintf("http://%s/admin/index.php?usrna me=%s&pass=%s",
$_REQUEST['domain'], $_REQUEST['usrname'], $_REQUEST['pass']);
header("Locatio n: $url");
?>
<title>Redirect </title>
<h1>Redirect</h1>
<p><a href="<?=$url?> "><?=$url?> </a></p>

Of course, if you use GET rather than POST you have the problem of the
password being part of the URL, in plain sight.

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact

**tencip** · Sep 25 '05, 11:45 PM

Re: Submit form with variable for action?

> Is method="post" set in stone?

Unfortunately, yes, it's set in stone. So while your example would
have worked great if this were a GET, it's a POST. =(

Any other ideas?

**rossz** · Sep 26 '05, 04:05 AM

Re: Submit form with variable for action?

tencip wrote:[color=blue]
> Hi everyone,
>
> So, i've got a form that is very simple. It hold three elements:
> username, password, and domain. The goal here is to have the form
> submit the login to an administrative section depending on which domain
> someone has chosen.[/color]

Ok, this is an ugly hack that uses javascript. I would never use it
because there is no guarantee javascript is enabled.

<html>
<body>
<? if (!is_null($_POS T['domain'])) { ?>
<form name='second' method='POST' action='<? $_POST['domain'];
?>/test/test2.php'>
<input type='hidden' name='name' value='<? print $_POST['name']; ?>'>
<input type='hidden' name='password' value='<? print
$_POST['password']; ?>'>
<input type='submit'>
</form>
<script language="javas cript">document .forms[0].submit()</script>
<? } else { ?>
<form method='POST'>
domain: <input type='text' name='domain'>< br>
Name: <input type='text' name='name'><br >
Password: <input type='text' name='password' ><br>
<input type='submit'>
</form>
<? } ?>
</body>
</html>

**Chuck Anderson** · Sep 26 '05, 04:15 AM

Re: Submit form with variable for action?

tencip wrote:
[color=blue]
>Hi everyone,
>
>So, i've got a form that is very simple. It hold three elements:
>username, password, and domain. The goal here is to have the form
>submit the login to an administrative section depending on which domain
>someone has chosen.
>
>For instance, let's say we have three administrative sites, that all
>have different URLs, but we want this one form to handle logging into
>any of them. So, the form itself needs to have a dynamic action
>element.
>
>Here's an example:
>
>Code:
>
><form action="http://www.mysite.com/admin/index.php" method="post"
>name="login" id="login" >
> <input name="usrname" type="text">
> <input name="pass" type="password" >
> <input name="domain" type="text">
> <input name="submit" type="submit" value="Login">
></form>
>
>Now, the issue is, instead of the action I have now, I need the action
>to change based on what is typed by the user in the domain field. So in
>the case above, if the user types "bobsite.co m" in the domain field,
>the action needs to point to "http://www.bobsite.com/admin/index.php".
>
>I have looked near and far for a solution for this. Using PHP, so have
>some flexibility, and javascript is okay if we have to use it.
>
>[/color]
It's quite simple in JavaScript.

First, remove the action from the form definition
<form method="post" name="login" id="login" >

Then, instead of using type=submit, use type=button.
<input type=button name=submit value="Login"
Onclick="Submit Form(this.form) ;">

function SubmitForm(form )
{
if (form.domain.va lue == "xxx")
form.action = "xxx"
else
form.action = "zzz";

form.submit(); // Submit the page
return true;
}

--
*************** **************
Chuck Anderson • Boulder, CO

Chuck Anderson's Cycle Tourist Home Page

http://www.CycleTourist.com

Integrity is obvious.
The lack of it is common.
*************** **************

**Joseph S.** · Sep 27 '05, 08:45 PM

Re: Submit form with variable for action?

This works on my computer, should work on yours as well:
just type yahoo.com in the third field:
<html>
<head>
<title>Variab le action field</title>
</head>
<body>
<form action="varacti on.php" method="post" name="login" id="login">
Username:<input name="usrname" type="text"/>
Password:<input name="pass" type="password"/>
Domain: http://www.<input name="domain" type="text"/>
<input name="submit" type="submit" value="Login"/>
</form>
<?php
if (isset($_POST['submit'])){
header("Locatio n: http://www.{$_POST['domain']}");
}
?>
</body>
</html>

**John Dunlop** · Sep 30 '05, 08:05 PM

Re: Submit form with variable for action?

Joseph S. wrote:
[color=blue]
> header("Locatio n: http://www.{$_POST['domain']}");[/color]

In the absence of a different status code, that will send a 302 (temporary
redirect). But the HTTP1.1 spec warns that some browsers treat 302
responses as if they were 303s, meaning that they issue a GET request no
matter what the first method was, be it HEAD, POST, whatever. Any
information POSTed the first time around wouldn't be sent again.

Your solution suggests that not all browsers treat 302s like that, that
some stick with POST.

To disambiguate this, in theory at least, HTTP1.1 provides the 303 and 307
status codes. 303 is for when user agents should perform a GET on the
Location URI, 307 for when they should continue using the same method as
before (possibly involving user interaction). Some browsers don't grok
these though. More details at

http://www.ietf.org/rfc/rfc2616

--
Jock

Submit form with variable for action?

Submit form with variable for action?

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