[Resolved] recently viewed items

[bampot]

i am trying to implement a recently viewed item function at the mo, by adapting the following code

if($code)
  {
    // new item selected
	if(!isset($_SESSION['viewed']))
	{
	  $_SESSION['viewed'] = array();
	  $_SESSION['item1'] = $code;

}
if(isset($_SESSION['viewed'] [$code]))
  // if set ignore
else
  // add to list

  }

yet i'm getting quite confused, should i be using an array, and if so should each array hold 1 code. I was hoping to have 3 most recent items displayed, how would i bump the items in the else statement so that the last 3 are viewable???

any help here would be much appreciated

[bad76]

Hi,
your "add to list" has to "scroll" the value of array, push out the first value and pop in the new item:

for($i=0; $i<(count($recent_list)-1); $i++)
   $recent_list[$i]=$recent_list[$i+1];
$recent_list[$i]=$new_item;

I Hope this helps, but I don't know how insert it into your code...

bye bye

[The_Chancer]

array_push()

array_pop()

If your list was supposed to be 3 long, count the sizeof() the array pop one off then push one on....

[bampot]

i've been trying various ways to make this work without much success

ended up with a basic code

$code = $_GET['code'];

  if($code)
  {
    // new item selected
	if(!isset($_SESSION['recent_list']))
	{
	  $_SESSION['recent_list'] = array();
	  $_SESSION['recent_list'] [1] = $code;
	}
	else
	{
	  $_SESSION['recent_list'] [3] = $_SESSION['recent_list'] [2];
	  $_SESSION['recent_list'] [2] = $_SESSION['recent_list'] [1];
	  $_SESSION['recent_list'] [1] = $code;

}

  }

i am not sure on the best method of creating an array, should i first create an empty array with the first statement which then gets filled by the next statement??

how could i incorporate a check so that the code doesnt already exist in the array, and how could i incorporate the array_push/pop/for statement so that each code will be bumped in the array??

again thanks for any help with this

[bampot]

hmmm

i now have this code

 

  if($code)
  {
    // new item selected
	if(!isset($_SESSION['recent_list']))
	{
	  $_SESSION['recent_list'] = array();
	  print_r($_SESSION['recent_list']);
	}
	if(isset($_SESSION['recent_list']))
	{
	  array_push($_SESSION['recent_list'], $code);
	  print_r($_SESSION['recent_list']);
	}
	$count = (count($_SESSION['recent_list']));
	if($count >= 4)
	 // $_SESSION['recent_list'] = array_reverse($_SESSION['recent_list']);
	  array_pop($_SESSION['recent_list']);
	  print_r($_SESSION['recent_list']);

  }

which will push the new code onto the array, however the new code gets 'popped' off the end, tried reverse without joy so far,
also still stuck on checking for duplications

[Weedpacket]

You've got four functions to look at.
[man]array_pop[/man]
[man]array_push[/man]
[man]array_shift[/man]
[man]array_unshift[/man]
Two of those functions move stuff on to and off the end of the array, the other two move stuff on to and off the beginning. In your case, if you want to put the most recent element on the beginning, you want to take the oldest off the end.

You'll also want to look at [man]in_array[/man] and possibly [man]array_unique[/man].

[bampot]

thanks for that

i think i've got it working, does this look ok?

 if($code)
  {
    // new item selected
	// if not set create empty array
	if(!isset($_SESSION['recent_list']))
	{
	  $_SESSION['recent_list'] = array();
	  print_r($_SESSION['recent_list']);
	}
	// if set add code to beginning of array
	// if code exists ignore
	if(isset($_SESSION['recent_list']))
	{
	  if (in_array($code, $_SESSION['recent_list']))
	   echo '';
	  else 
	   array_unshift($_SESSION['recent_list'], $code);
	   print_r($_SESSION['recent_list']);
	}
	// if total list is greater than or equal to 4 
	// pop one off the end
	$count = (count($_SESSION['recent_list']));
	if($count >= 4)
	  array_pop($_SESSION['recent_list']);
	  print_r($_SESSION['recent_list']);

  }