Re: [PHP] Creating 'Next' & 'Previous' for PHP Photo Gallery
- From: sleepwalker@xxxxxxxxxxxxxxxx (Rahul Sitaram Johari)
- Date: Wed, 11 Jul 2007 08:41:15 -0400
Jim,
Code looks extremely promising & well explained - let me give it a try and
work it out. I'm sure to hit snags - but can't thank you enough.
The one thing that comes straight off in my mind looking at the code is -
and I may be addressing this prematurely since I haven't tried the code yet
- but my thumbnails are in a Separate .php page, and each thumbnail links to
the full image which are in a Separate .php page.
The Next & Previous link I'm trying to create are to be displayed on the
full image page.
But let me integrate the code and see how I can pass the values along to
pages and make it work.
Thanks again!
On 7/10/07 11:04 AM, "Jim Lucas" <lists@xxxxxxxxx> wrote:
Rahul Sitaram Johari wrote:.
I¹m trying to write a Photo Gallery in PHP. Everything else is pretty much
worked out like thumbnails, indexes, titles & all the one thing I¹m
stuck at is the Next & Previous links for the Photos on the main Photo Page.
It¹s a simple program where you drop images in a folder and glob() picks up
the thumbnails displays them on a page which are automatically linked to
the Full Size Images. This is the code:
<?
$ID = $_GET['ID'];
The following code is completely untested. I typed it straight into the email
client.
You might have to track down a few bugs. It should give you a good start
though
# Set your page display limit
$display_limit = 20;
# Collect a list of files
$filelist = glob("$ID/thumbnails/*.jpg");
# get the current page number, set the default to 1
$pageNum = 1;
if ( !empty($_GET['pageNum']) ) {
$pageNum = (int)$_GET['pageNum'];
}
# count the total number of files to list
$total_files = count($filelist);
# calculate the total number of pages to be displayed
$total_pages = ceil($total_files/$display_limit);
# Initialize the link holder array
$links = array();
# Since I don't know the name of your script, I assume that it should link to
itself
# So I will use $_SERVER['SCRIPT_NAME'] to get the scripts true name
# Create Previous tag is needed
if ( $pageNum > 1 ) {
$links[] = "<a
href='{$_SERVER['SCRIPT_NAME']}?ID={$_GET['ID']}&pageNum=".($pageNum-1)."'>Pre
vious</a>";
}
# Create Next tag is needed
if ( $pageNum < $total_pages ) {
$links[] = "<a
href='{$_SERVER['SCRIPT_NAME']}?ID={$_GET['ID']}&pageNum=".($pageNum+1)."'>Nex
t</a>";
}
# Display the link if they exist
echo '[ '.join(' | ', $links).' ]';
foreach ($filelist as $key=>$value) {
$title = rtrim(basename($value),'.jpg');
$newtitle = preg_replace('/_/', ' ', $title);
?>
<A HREF="photo.php?photo=<?php echo basename($value); ?>&title=<?php echo
$newtitle; ?>&ID=<?php echo $_GET['ID']; ?>&KEY=<?php echo $key; ?>"
TARGET="photoFrame">
<IMG SRC="<?php echo $ID; ?>/thumbnails/<?php echo basename($value);
?>"></A>
<?php echo $newtitle; ?>
<?
}
?>
I know that $key holds the sequence of images that are being picked up by
glob() - I¹m just trying to figure out a way to use this $key to generate
the Next & Previous link. The problem is everything is passed on to a
separate page (photo.php) ... What I¹m thinking is determining which Photo
File would be Next or Previous to the one being selected, and passing that
along to the (photo.php) page. I¹m just not able to figure out how to pick
out the next & previous filename and place it in the Query String.
Any suggestions?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rahul Sitaram Johari
CEO, Twenty Four Seventy Nine Inc.
W: http://www.rahulsjohari.com
E: sleepwalker@xxxxxxxxxxxxxxxx
³I morti non sono piu soli ... The dead are no longer lonely²
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- From: Jim Lucas
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