Still trying to tweak the web server that little bit more.
More mysql optimisations – indexing, caching and some memory work.
I finally found a version of php5-eaccelerator that worked against PHP 5.2.12 on SLES 11. That seems to be working well right now.
It’s been a good six months since the last LEGO robotics club at school – I should blog on what we did in that session.
This term it’s time to start up LEGO robotics again; we’ve limited the pre-school class to 4th and 5th grade – so we should have a pretty reasonable level of logic and construction skills.
I’m writing up the rules and the playbook for this session. We’re going to focus on three areas – similar plan to previous sessions:
– construction: gears, gear ratios and torque
– software: planning, prototyping, iterative troubleshooting
– project: communication, team work, documentation
The requirement is going to be:
Build a robot that can pull the largest mass on the sledge provided. A successful ‘pull’ will be over 50cm (20 inches)
Using the same robot chassis (you can change wheels and gears – but not rebuild the robot) cover a long, straight race course (~5m/~15 feet)in the shortest time.
Produce a display board for your project showing your design, thoughts, diagrams, photos and program.
I’ve been hand-hacking wp-includes/pluggable.php for several releases now. It just got old – so I decided to learn to write a real plugin to move the functionality of wp_redirect into my private plugin.
Here’s the issue. I have several sites that check that a user is logged in. These use runphp or exec-php so I can write/include PHP on the page:
<?php
/* Short and sweet */
global $user_level,$post,$user_login;
// get user information
get_currentuserinfo();
echo "Please wait … securing your connection …";
if ( $user_level == 0) {
// $user_level == 0 is anonymous or not logged in user
wp_redirect(get_option(‘siteurl’) . ‘/photos/sorry’);
}
else {
// $user_level >0 means they are logged in at least
wp_redirect(get_option(‘siteurl’) . ‘/wpg2’);
}
?>
The issue I’ve always had with this is that the standard wp_redirect writes the location information cleanly; because we are already in the page (and headers have already been written) Apache throws up and kills this:
[Thu Dec 31 04:51:18 2009] [error] [client 10.0.0.1] PHP Warning: Cannot modify header information – headers already sent by (output started at /www/foosite/wp-content/themes/regulus/header.php:5) in /www/foosite/wp-content/plugins/php-modify-headers-apache/php-modify-headers-apache.php on line 38, referer: http://foosite
The hand written fixes checked to see if headers had been sent; if so then do the naughty meta http-equiv refresh with the url instead.
if( !headers_sent() ) {
if ($is_IIS)
header("Refresh: 0;url=$location");
else
header("Location: $location");
} else
echo "<meta http-equiv='refresh' content='0;url=$location' />";
}
Testing the plugin now. Details later.
Upgrades to WordPress 2.9 on several of the production blogs – and it’s the same old issue with php header injection.
I’ve blogged about this before – and raised a trac ticket. I’m probably going to write a plugin to solve this one for good.
Here’s the change – around line 863 of wp-includes/pluggable.php
/* ** Remove header injection piece - fix for exec-php ** evilzenscientist - 27 Dec 09 ** originally from 28 May 08 ** ref http://trac.wordpress.org/ticket/2860
if ( $is_IIS ) {
header("Refresh: 0;url=$location");
} else {
if ( php_sapi_name() != 'cgi-fcgi' )
status_header($status); // This causes problems on I
header("Location: $location", true, $status);
}
}
endif;
** */
/** added new header injection and refresh ** http://trac.wordpress.org/ticket/2860 ** evilzenscientist - 28 May 2008 */ if( !headers_sent() ) { if ($is_IIS) header("Refresh: 0;url=$location"); else header("Location: $location"); } else echo "<meta http-equiv='refresh' content='0;url=$location' />"; } endif; /** end of change */
WordPress 2.9 beta 1 hits the streets today.
Looks pretty nifty – and everything seems to work ok so far.
From Mark Jaquith:
http://wordpress.org/wordpress-2.9-beta-1.zip
Big features to test:
• Basic image editing (rotate, flip, resize, crop)
• Post/Page image thumbnails. Enable the admin UI by declaring support
in your theme: add_theme_support(‘post-thumbnails’);
• Trash, with undo functionality, for posts, pages, comments
• Comment Meta table and functions — like Custom Fields/postmeta but
for comments
• Easy media embeds, oEmbed — paste a URL on its own item and have it
turn into embed code
• register_theme_directory() which enables plugins to bundle their own
themes, without copying (BuddyPress, primary example)
• Combo upgrader — get notified of plugin updates in the WP core
upgrader, as well as being informed of crowd-sourced compatibility
information for the plugins.
It’s bug-fixing and polishing time! Our priorities should be, in this order:
1. Fixing regressions in old features/behaviors
2. Squashing bugs in the new features
3. Polish
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