is_array and explode - don't work for me

fabiuz

I am trying somethig like this:

$os = "mac,nt,irix,linux";
$os_pieces = explode(",", $os);
$find = 'irix';

if (in_array($find, $os_pieces)) {
$errore .= "irix has been found ";
} else {
$errore .= "not found irix ";
}

and it is working

then I put $os in a crypted cookie and I get it back
I decode the cookie:

$key = 'mykey';
$code = base64_decode($_COOKIE['my_cookie_value']);
$my_cookie_value = mcrypt_cbc(MCRYPT_DES, $key, $code, MCRYPT_DECRYPT);

then I do the same of before but it doesn't work :-((

$os_pieces = explode(",", $my_cookie_value);
$find = 'irix';

if (in_array($find, $os_pieces)) {
$errore .= "irix has been found ";
} else {
$errore .= "not found irix ";
}

I get not found :-(

The values in array seems to be ok but the function is_array doesn't work :-(

I am becoming crazy, anybody could help ?

Thanks a lot

Installer

Place

echo $my_cookie_value . '<br />';

after the $my_cookie_value = mcrypt_cbc(..." statement and

print_r($os_pieces) . '<br />';

after the "$os_pieces = explode(..." statement. That may provide some idea of what's happening to the data.

fabiuz

I got something like this:

Array
(
[0] => linux
[1] => win
[2] => unix
[3] => linux
[4] => lindows
)

it seems ok, but it doesn' work with in_array function :-(

Installer

When you test it are you testing only for "irix". Because "irix" doesn't show up in the array in your last post. You do have "linux" twice, though. Otherwise it should work.

fabiuz

yes, sorry, it was only a sample... I get all values but it doesn't work when explode is made on the cookie :-(

It seem that there is a problem with the data in the cookie but I cannot understad which is.

Thanks

tsinka

What does

echo $my_cookie_value . ' ';

print ? Are there any whitespaces in the string ?

Thomas

fabiuz

it seems ok

there is any white space

it is like when the array is make from the decrypted cookie the function doesn't work.

If I set a string before the is_array code, wih the values of the cookie, it works.

When I print decrypted string from cookie and the string I type they seems to be the same.

I still don't understad what is wrong 🙁

fabiuz

May be that I have found the problem:

it seems like when I use the functions base64_encode and base64_decode to store the cookie somethings goes wrong.

The string seems to be the same once decrypted but it doesn't work.

If I remove base64_decode and base64_encode all seems to work.

Somebody could explain ?

Thanks

TheDefender

I am not sure why, but, this comes from the manual for [man]mcrypt_cbc[/man]:

"This function should not be used anymore, see [man]mcrypt_generic/man and [man]mdecrypt_generic/man for replacements."

Installer

I'll probably kick myself for getting back into this thread, but...

Are you sure that, as tsinka asked, there is no whitespace being encrypted? It wouldn't show in a simple "echo". For instance:

$os = "mac, nt, irix, linux";
$os_pieces = explode(",", $os);

would result in "mac", "<space>nt", "<space>irix", "<space>linux".

fabiuz

🙁

I have tested again on Mozilla Firefox and I have discovered that NUL chars were added at the end of each crypted string :-/

For now I have solved with a str_replace("\0", "", $string);

Is there any better way ?

Is base64_encode/decode needed to write in cookies ?

Thanks a lot!

TheDefender

A possibly better alternative would be to use [man]trim[/man]

<?php
trim($string, "\0");
?>

This trims \0 off of the front and back only. str_replace would remove \0 anytime it encounters it (which could be in the middle of the string).