Pointers In Arrays

Anon

How do I move around in an array? I need to know how do I tell the pointer where I am in the array and how to move to the next or previous value in the array. Basically, I'm trying to do some complex NEXT / PREVIOUS buttons.

For example: Let's say I have an array that's called paging. In that array are the following values: 1,34,5,8,2,20,7. The values represent a row in the database. The database is a bunch of articles.

The user is on article number 5. (read.php?articleID=5)

How do I move back and forward in the array, so I can make the next button go to articleID 8 and the previous articleID 34.

Anon

I think a good alternative is putting a hidden entry in your form with the current position, and go to next or previous depending on what the user chose.
example:

if($next)
{
$pos++;
$article = $array[$pos];
}
elseif($prev)
{
$pos--;
$article = $array[$pos];
}

...

echo "<input type='hidden' name='pos' value='$pos'>\n";

of course, do some consistency... 🙂

I hope this helps.

ibeblunt

It's not using a FORM. Lemme give you the link.

http://www.sohh.com/thewire/read.php?contentID=1023

Thats the article.

Now if you look at the top of the page, it shows you want is in the array. How do I make it set the next article link to http://www.sohh.com/thewire/read.php?contentID=1019 and the previous article link to http://www.sohh.com/thewire/read.php?contentID=1030?

Steven

Anon

You should, instead of sending the article ID, send the array position as a parameter to your script.

START CODE

$article = $array[$pos];
$ppos = $pos-1;
$npos = $pos+1;

echo "<A HREF=\"http://www.sohh.com/thewire/read.php?pos=$ppos\"> previous article</a>\n";
echo "<A HREF=\"http://www.sohh.com/thewire/read.php?pos=$npos\"> next article</a>\n";

END CODE 🙂

Now, if you had this array:
$array = array(1019,1023,1030);
and your $pos is 1, $array[$pos] is 1023. $array[$pos-1] is 1019 and $array[$pos+1] is 1030.

If you still have any doubts and wanna talk, UIN 8164426. 🙂

Mauricio.