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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <php@PointedEars.de>
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Date: Thu, 03 May 2012 18:05:59 +0200
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Subject: Re: Removing specific array items
Newsgroups: comp.lang.php
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Scott Johnson wrote:

> In a simple quote cart I track items in a session.
> 
> $_SESSION['quote'][##] = {data}
> 
> Which increments the ## for each added item.

ISTM you are looking for

  $_SESSION['quote'][] = $data;

instead, which automatically increments the index of the item in 
$_SESSION['quote'].  On the other hand, if the real code was

  $_SESSION['quote'][$index] = $items[$index];

you might want to consider simplifying the loop to one statement:

  $_SESSION['quote'] = $items;

> At the time when the client wants to remove an item from the cart I just
> clear the {data} from $_SESSION['quote'][item_id] = '';

Consider

  unset($_SESSION['quote'][$item_id]);

instead.
 
> The issue i run into is when I want to display the cart, i just cant
> step thru the array without seeing if a particular item is '',

(Please try to work on your spelling.)

> which works but would like to find a more 'elegant' way.

After the above, you might want to use

  if (!isset($_SESSION['quote'][$item_id])
  {
    /* Item with $item_id exists */
  }

This approach is more precise in combination with is_null().

> With all that said, is there a way to remove the item from the array
> rather then clear the items data.
                                  ^
That is _not_ a question.

> I have looked thru the 50+ different array functions and can't seem to
> find the right tool.  Maybe a combination I am not seeing.

There is:

<http://php.net/unset>
<http://php.net/isset>
<http://php.net/is_null>


PointedEars
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