Not getting get_browser() to wrok

relnah

I copy and paste this example code, that is supposed to list everything about your browser, into a .php file.

<?php
function list_array ($array)
{
while (list ($key, $value) = each ($array))
{
$str .= "$key: $value \n";
}
return $str;
}

$Result = get_browser($_SERVER['HTTP_USER_AGENT']);
echo list_array ((array) $Result);

This results in an error and an odd output:

Notice: Undefined variable: str in C:\Program Files\Apache Group\Apache2\htdocs\visitors\index.php on line 32
0:

That 0: is the output.

Please help me, what's wrong? The code? My ini settings? what?

I've been roamin the net for a day trying to learn how to use get_browser() with no luck, so any links to a good explination of it would be gratefull.

coditoergosum

The problem isn't in the get_browser() function, the problem is you're trying to concatenate an unset variable. Is this the whole script, or is there more to it before the code you posted? If this is all of it, then why are you using .= (concatenation)? If there's more to it, and for some reason the var just isn't getting set, you can use some code this:


if (!isset($str)) { $str = ""; }

... or, just use $str = "$key: $value \n"; , rather than .=

relnah

I copied that pice of code from the php manual.
I tried to change .= to just =
That removed the error and left me with 0: as output
Adding if (!isset($str)) { $str = ""; } instead of changing .= also just left me with 0: as output.

So something else is wrong.