Question

Based on Hunter F’s answer, the solution to my problem is almost complete.
Just a couple of tweaks needed.

I modified the code a little and submitted a new question here at: php array help required – if current array item = 'last or first item' then 'do something'

ORIGINAL MESSAGE:

I want to be able to create a simple navigation bar with PREV and NEXT links that I can use to cycle though a list of pages. The navigation bar will be a php include within all of the pages to be cycled.

So I guess the starting point is to create an array of the pages that need to be cycled though with the PREV NEXT links.

Such as….

$projectlist = array(
        'http://domain.com/monkey/',
        'http://domain.com/tiger/',
        'http://domain.com/banana/',
        'http://domain.com/parrot/',
        'http://domain.com/aeroplane/',
);

I want to option to re-order, add or remove the links. So having one self contained master array such as this seems like a logical choice to me as I’ll only need to update this one list for any future additions.

Each directory being linked to has it’s own index.php file, so I’ve left the index.php part off from the end of the links as it’s not needed…or is it?

…I’m pretty stumped as of how to continue from here.

I guess I need to work out which page within the array I’m currently on, then generate the PREV and NEXT links based on that. So If I entered from ‘http://domain.com/parrot/‘ I would need links to the relevant PREV and NEXT pages.

Any help or information to guide me on this next stage would be most appreciated.

Answer 1

$currentPath = explode('?', $_SERVER['REQUEST_URI']); //make sure we don't count any GET variables!
$currentPath = $currentPath[0]; //grab just the path
$projectlist = array(
        '/monkey/',
        '/tiger/',
        '/banana/',
        '/parrot/',
        '/aeroplane/',
);
if(! in_array($currentPath, $projectlist) ) {
    die('Not a valid page!'); //they didn't access a page in our master list, handle error here
}
$currentPageIndex = array_search($currentPath, $projectlist);

if($currentPageIndex == 0) { //if it's on the first page, we want them to go to the last page
    $prevlink = '<a href="'.$projectlist[ sizeof($projectlist)-1].'">Prev</a>';
} else { //otherwise just go to the n-1th page
    $prevlink = '<a href="'.$projectlist[$currentPageIndex-1].'">Prev</a>';
}


if($currentPageIndex  == sizeof($projectlist)-1 ) {     //if we're on the last page, have them go to the first page for "next"
    $nextlink = '<a href="'.$currentPageIndex[0].'">Next</a>';
} else {
    $nextlink = '<a href="'.$projectlist[$currentPageIndex+1].'">Next</a>';
}

One thing you may want to consider, is urlencoding the href targets in the link.