[RESOLVED] Next and Prev links in an image gallery

nawrik

Does anybody know how to create a set of next and prev links for an image gallery.

The image is currently been loaded from an array via GET in the browser URL:

?image=1


$imageid=$_GET["image"];

This is then used to pull the correct image from an array created from a db:

echo '<img src="$image[$imageid]['location']" />';

I want the next and previous links to click through the array and if it reaches the end simply loop back to the beginning.

I have no idea how to create this and searching the internet for the last 2 hours I can't get anything working.

I believe I need to use the current $imageid to + / - a value for $next and $prev

I'm not 100% on how to do this.

All help appreciated.

rincewind456

Something like this

<?php

$imageid=$_GET["image"]; 

$count = count($ImageArray)-1; 	#	<----- do a count of the number of items in the array -1 because arrays are numbered from 0

$previous = $imageid-1;

#If Previous link is a negative number then change it to the last number in the array
if ($previous <0) {
	$previous = $count;
}

$next = $imageid+1;

#If next link is higher than the array count go back to the first array number in this case zero.
if($imageid >$count){
	$next = 0;
}

?>
<a href="IMAGEPAGE.php?id="<?php echo $previous;?>">Previous</a>
<a href="IMAGEPAGE.php?id="<?php echo $next;?>">Next</a>

Should give you some ideas.

nawrik

rincewind,

after a couple of little tweaks - that worked a treat. Thank you!

What it now looks like:

$imageid=$_GET["image"];

$count = count($gallery)-1;     #    <----- do a count of the number of items in the array -1 because arrays are numbered from 0


$previous = $imageid-1;


#If Previous link is a negative number then change it to the last number in the array
if ($previous <0) {
    $previous = $count;

}

$next = $imageid+1;

#If next link is EQUAL TO the array count go back to the first array number in this case zero.
if($imageid == $count){
    $next = 0;

}
echo "<a href=\"?image=";
echo $previous;
echo "\">Previous</a>";
echo "<a href=\"?image=";
echo $next;
echo "\">Next</a>";

?>

The only changes were making the $next $imageid EQUAL TO $count. This stopped it going to an $imageid that was higher than existed in the database before reseting to '0'.

Also a little tweak of the <a href=""> tag.

Again, rincewind Thank you!