Drupal URL/URI - How to get the URL/URI of the current Drupal page

Drupal FAQ: How do I get the URI (or URL) of the current web page from my Drupal theme?

Sometimes when you're working on a Drupal theme, or customizing an existing Drupal theme, you'll want to know the URL (or more likely, the URI) of the page that the user is currently looking at so you can customize that page (or more likely, a series of pages beginning with a certain URI pattern, as with this Custom Drupal PHP block example).

PHP modulus operator example

PHP FAQ: Can you share an example of how to use the PHP modulus operator?

Sure, here are two examples of how to use the PHP modulus operator. In this first example, because the remainder (the modulus, or technically, the modulo) of 100 divided by 5 is zero, the string "a was 0" will be printed:

PHP installation error - unable to install php5 - configure: error: libjpeg.(a|so) not found

I ran into this error message today when trying to install PHP 5.2.x on a CentOS Linux server:

unable to install php5 - configure: error: libjpeg.(a|so) not found.

Actually, although I wrote "install" above, I was trying to run the PHP configure script when I got that PHP error message. (configure is the command you run before you run the make or make install commands.)

The Drupal Diaries, Day 10

Wow, it's taking an awful lot of work trying to keep this site running right now. The server we're currently running on is a virtual CentOS machine with 256MB RAM, and the constant traffic from both users and robots (crawlers) causes Apache to lock up from time to time. Right now I'm tweaking all the LAMP (Linux, Apache, MySQL, and PHP) knobs I know how to tweak to keep the site more or less running most of the day.

Here's a quick review of the hacks, er, performance optimizations, I've been working on.

Solved problem trying to configure PHP with GD support


I was just trying to install PHP from source code on a CentOS Linux box, specifically trying to configure PHP with GD support with a configure command like this:

./configure --with-apxs2=/usr/local/apache2/bin/apxs \
            --with-mysql \

Unfortunately this configure command fails, ending with the following two lines of error output:

A review of five free text editors for Mac OS X (Part 3)


jEdit is an open source Java-based text editor that has been around for years. On the positive side it's free, reasonably quick, and most importantly, it has a ton of third-party plugins. All those plugins are what keeps me coming back to look at jEdit from time to time.

A collection of PHP scripts for OpenSSO

Before I get too far away from this code, I wanted to present my examples related to PHP and OpenSSO in a more logical order than the way in which I originally posted them. To that end, here is my collection of PHP/OpenSSO tutorials, showing how a PHP application can manually interact with an OpenSSO server in a single sign-on, identity-management world:

The PHP "headers already sent" error message

Still in my early days working with PHP, I've learned that it's really easy to generate the dreaded "headers already sent" error message. If for some reason you actually want to generate this error message intentionally, I've learned that all you have to do is try to send HTML body content (any non-header content) before calling the header() or setcookie() methods, and you'll get that PHP error message right away.

PHP redirect - How to send a redirect with PHP

PHP redirection FAQ: How can I redirect a user in a PHP script?

I've been working with OpenSSO a lot lately (Sun's open source identity management product), and one thing you see right away is that they redirect the user's browser a lot during the login process. During a typical login process a user will attempt to access a protected page; an OpenSSO agent will redirect the user's browser to the OpenSSO login page; and after a successful login they redirect you back to the protected resource.