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php-db | 2005011

Re: [PHP-DB] & terminates string? From: Jochem Maas (jochem <email protected>)
Date: 01/06/05

Perry, Matthew (Fire Marshal's Office) wrote:
> I am using PHP 4.3.1 and running Apache Server and MySQL.
>
> The following question is probably only related to PHP.
>
>
>
> Here is the problem:
>
>
>
> I am passing the following string from one form to another:
>
> "../create.php?dest=Employee/menu_handleemployee.php?action=update&ID=$ID"
>
>
>
> Here is the actual code:
>
> <form
> action="../create.php?dest=Employee/menu_handleemployee.php?action=update&ID
> =<?echo $ID;?>" method="post" enctype="multipart/form-data"
> name="form1EMPLOYEE">
>
>
>
> When I view the source it comes out as expected:
>
> <form
> action="../create.php?dest=Employee/menu_handleemployee.php?action=update&ID
> =82"
>
> method="post" enctype="multipart/form-data" name="formEMPLOYEE">
>
>
>
> But after it goes to the next page it turns into this:
>
> "../create.php?dest=Employee/menu_handleemployee.php?action=update"
>
> Everything up to and after the '&' disappears!!
>

that because PHP sees your URL as having two GET vars:

dest=Employee/menu_handleemployee.php?action=update
ID=82

the ampersand is the default name/value pair seperator.

try using urlencode() [and urldecode() when you actually want to
redirect to that 'dest' url] on the redirect string when passing it
along in the URL (or form field)

e.g.

$action =
'../create.php?dest='.urlencode("Employee/menu_handleemployee.php?action=update&ID=$ID");

and if that doesn't work try replacing the '&' char with something else e.g.

$action =
'../create.php?dest='.str_replace('&','$$',"Employee/menu_handleemployee.php?action=update&ID=$ID");

and then before your redirect to that url reverse the replacement e.g.:

header('location: ' .
str_replace('$$','&',"Employee/menu_handleemployee.php?action=update&ID=$ID"));
exit;

BTW: 2 dollar signs may not be the best choice of chars to use.

another way of tackling the issue is by looking at the contents of
$_SERVER (a auto superglobal var, just like $_GET, $_POST etc) - try:

print_r($_SERVER);

you'll be surprised what kinds of useful items are contained in that array.

while you're at it try:

print_r($_GET);

looking at the output of that will probably help you understand where
the 'ID' bit of the redirect url went.

<RANT>

print_r() is your friend USE IT!!! OFTEN!!!

sing this as a reminder "When in doubt print it out"
[ (tm) Wong Coding Industries ;-) ]

</RANT>
>
>
> The goal of this code is to send the redirect address to the form that
> modifies my data.
>
> I want variable "dest" to be used to dynamically redirect the page.
>
>
>
> I have tried the following to fix the problem without avail:
>
> 1) I tried saving the variable in other ways such as text fields in the form
> itself.
>
> 2) I tried addslashes() (which works well with similar problems related to
> ', " etc.).
>
> 3) I tried adding \ before &
>
> 4) I danced around my computer and threatened to pull the plug.

you forgot to wave the dead chicken around your head!

>
> None of these worked!
>
>
>
>
>
> What is it about '&' that throws everything off with PHP variables? It
> doesn't seem to be a problem with HTML.

its the default request name/value pair seperator.

>
> This is exceedingly difficult to research online because '&' is excluded
> from most search engines automatically.

it's called an ampersand. which might help further searching.

>
>
>
> -Matthew
>
>
>
>
>
>
>
> 

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