Zenphoto

I have created this hack to cater to people who wish to provide a custom login for users which will take them directly to the albums they are allowed to view and/or administrate. This need was suggested on the forums in the thread Linking my login form to ZenPhoto.

The hack assumes that you have created admin users with the appropriate rights and albums to manage. Admin users with User Administration rights are directed to the gallery after they log in. All others are directed to the first album in their managed album list.

Place this script in the root folder of your zenphoto installation. If you installed in 'zenphoto' this file becomes zenphoto/single_login.php. For the page that you tell your users to access create a script that contains only the following:

<?php header("Location: zenphoto/single_login.php" ); ?>
The Script is bare-bones. You will want to format and (...)

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Put the file in your zenphoto/zp-core/random.php

To call from another PHP
@readfile('http://yourgallery.com/zenphoto/zp-core/random.php?
num=9&height=50&width=50&class=one-image')
The above mean return 9 random images which height and width is 50px and the style class is "one-image".

@readfile('http://yourgallery.com/zenphoto/zp-core/random.php?
num=9&height=50&width=50&class=one-image&album=city')
this will only get the random images from album "city"(the parameter is the folder of album).

The idea is to group together in the same rss entry all the photos that have been added at the same time in the same album. Photos are browsed by decreasing mtime (=upload date, because id doesn't seem to be very reliable), and every time the album change, or a one hour gap occurred during uploading, a new entry is created. This entry contains the list of all photos with title and description, and optionally photo (?showphotos). RSS entries are not created if the latest photo is less than 1 hour old, in order to avoid multiple entries for the same uploading event (moreover it gives some time to edit titles and descriptions during this hour).

a. Reduce load on the DB server

This is based on the caching technique described on https://www.zenphoto.org/2008/01/hacks/ We'll use eAccelerator shm cache instead of storing the query results on disk.
1. Edit the functions-db.php under zp-core directory.
2. Search function query_single_row, change it to:
function query_single_row($sql, $noerrmsg=false) {
if ($cache = get_cache($sql))
return $cache;
$result = query($sql, $noerrmsg);
if ($result) {
$data = mysql_fetch_assoc($result);
store_cache($sql, $data);
return $data;
}
else {
return false;
}
}
3. Search function query_full_array, change it to:
function query_full_array($sql, $noerrmsg = false) {
if ($cache = get_cache($sql))
return $cache;
$result = query($sql, $noerrmsg);
if ($result) {
$allrows = array();
while ($row = mysql_fetch_assoc($result))
$allrows (...)

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Database result cache

As we know, the database will use many resource and time to query the information of Image. If we want to save time, we could do optimization with cache the result.
What I use is two functions, you could use other PHP cache library too. The code I use is version 1.13.
!! Please note: because I don't open the comment function, so it may have problem with comment.

1. Edit the functions-db.php under zp-core directory.

2. Search function query_single_row, change it to:
function query_single_row($sql){
if ($cache = get_cache($sql))
return $cache; $result = query($sql);
if ($result) {
$singlerow = mysql_fetch_assoc($result);
store_cache($sql, $singlerow);
return $singlerow;
} else {
return false;
}
}
3. Search function query_full_array, change it to:
function query_full_array($sql){
if ($cache = get_cache($sql)) (...)

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As per yahoo! optimization guidelines http://developer.yahoo.com/yslow/ for making Zenphoto faster at client-side, here are some hacks.

FIRST: Edit .htaccsss file and add the following lines.

 ExpiresActive on
 ExpiresDefault "access plus 1 year"
 
 FileETag None
 That will make your image, javascript,css files cache lifetime 1 year+ and Removes Etags, If Apache WebServer?has attached any. So that webpage header size can be reduced.

SECOND: If your web server is supporting gzip compression, edit index.php and add following line at Top of the page.

header("Vary: Accept-Encoding");if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip'))
 ob_start("ob_gzhandler");
 else ob_start();

So, Web server will deliver entire webpage as gzip compression format to the browser. So, network bandwidth can be reduced.

THIRD: (...)

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This script grabs the photos and meta data and creates albums in Zenphoto and entries in the appropriate tables.

A tutorial from 2008 to migrated from the autogallery plugin of the CMS e107 to Zenphoto including a Phyton script to migrate the view counter to Zenphoto's hitcounter.

A very basic script in Perl that will copy over Metadata from Coppermine to Zenphoto. The data is keyed on filename, so it is assumed that you have unique filenames in your albums.

A Perl script to import Menalto Gallery 2 Image Descriptions.