[Resolved] Sessions and arrays

g7ibby

A moment of educational zen and the end of the project is closer than ever.

I can add the variable to the session and pull it back out without a hitch.

   $name = $_POST['name'];
   session_register('name'); 
   $_SESSION['name'] = $name; 
   echo $_SESSION['name'];

For my next trick I'm trying to add an array to the session and then pull a single item from the array or list each element in the array.

I have seen the following in a few threads but im not sure exactly how to use it.

session_register(${$unique_value});

The array example im using is being created like this.

$people = array (
	array ( name=>"John",
		age=>24 ),
	array ( name=>"Susie",
		age=>7 ),
	array ( name=>"Dave",
		age=>2 )
		);

Is this the correct way to set the array to the session?

session_register(${$people});

And using this technique, can I add, delete, and edit items in the array eficiently? If so where can I find examples of changing arrays within a session?

Thank you

matt_4013

You shouldn't be using session_register() and the $SESSION methods. If your server supports $SESSION, (which it obviously does), then you don't need to register your session variables before initializing them. So your "name" code should look like this:

session_start();

$name = $_POST['name'];
$_SESSION['name'] = $name;

echo $_SESSION['name'];

Back to your array question 🙂 A session variable acts like any other. So, when you add a multidimensional array to it, like you want to do (ie, $_SESSION['people'] = $people😉, it will work just like the other variable. It's a bit different when working with objects, but for normal variables, it's exactly the same.

session_start();

$foo = array(
             array("key1"=>"value1",
                   "key2"=>"value2"),
             array("key1"=>"value3",
                   "key2"=>"value4")
             );

$_SESSION['foo'] = $foo;

// To echo "value3"
echo $_SESSION['foo'][1]['key1'];

Hope that helps!
Matt

$_SESSION

g7ibby

Thanks Matt!!!🙂
That helped out alot.

I would like to set up one more senerio if I could.
This is where we left off.

session_start();

$foo = array(
             array("key1"=>"value1",
                      "key2"=>"value2"),
             array("key1"=>"value3",
                      "key2"=>"value4")
             );

$_SESSION['foo'] = $foo;

// To echo "value3"
echo $_SESSION['foo'][1]['key1'];

How can I remove only
$session['foo'][0]['key1']
or even the first array within $session['foo']

Thanks Again
G

minorgod

Just set whatever key you want to kill equal to NULL, so in your example you could do:

$_SESSION['foo'][0]['key1']=NULL;

However, you whould capitalize the word SESSION and not write it as $_session. It may work both ways on a Windoze server, but it might screw things up on Linux since Linux is case-sensitive.

If you wanted to kill the whole 'foo' sub-array, then just set that key equal to NULL:

$_SESSION['foo']=NULL;