CODEWITHSUNDEEP
phparrayssession
user3005635
user3005635

Reputation: 87

unset multidimensional array

I am having a hell of a time with this. I have a multidimensional array that I am storing in a session.

$d1 = array(1,2,3,4);
$d2 = array(1,2,3,4,5,6);
$d3 = array(1,2,3,4,5,6,7,8);
$d4 = array(1,2,3,4,5);
$_SESSION['array1'] = array($d1,$d2,$d3,$d4);

what I want to do is remove the $d2 array from the session array1

however when I do something like this

unset($_SESSION['array1'][1]);

you would think that $_SESSION['array1'] would then = array($d1,$d3,$d4);

however what that does is actually unset the whole session variable.

Then if I try something like

foreach ($_SESSION['array1'] as $k => $v) {
echo "The Key is $k: The Value is $v";
}

however that gives me an error

Invalid argument supplied for foreach()

The only conclusion that I can come to is that the session variable is being completely unset, not that just the specific key is being removed from the array.

is there any way that i can unset a specific value contained within an array that is part of a session variable?

Upvotes: 3

Views: 157

Answers (3)

SaidbakR
SaidbakR

Reputation: 13534

Use array_splice as the following code shows:

$_SESSION['array1'] = array_splice($_SESSION['array1'],1,0);

Upvotes: 1

Tomáš Zato
Tomáš Zato

Reputation: 53129

Code you present works as expected:

header("Content-Type: text/plain");
session_start();
$d1 = array(1,2,3,4);
$d2 = array(1,2,3,4,5,6);
$d3 = array(1,2,3,4,5,6,7,8);
$d4 = array(1,2,3,4,5);
$_SESSION['array1'] = array($d1,$d2,$d3,$d4);
unset($_SESSION['array1'][1]); 
print_R($_SESSION);

Prints: 

Array
(
    [array1] => Array
        (
            [0] => Array
                (
                    ...
                )

            [2] => Array
                (
                    ...
                )

            [3] => Array
                (
                    ...
                )

        )

)

So some debugging ideas:

  1. Don't use @session_start.
  2. Set error_reporting(E_ALL)
  3. Configure error reporting in php.ini
  4. Check your cookies to see whether the PHPSESSID cookie was sent at all.

Upvotes: 1

Nicoli
Nicoli

Reputation: 914

How about storing your session variable again:

$_SESSION['array1'] = array($d1,$d3,$d4);

Upvotes: 0

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