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A strong password policy, particularly for people with power, is crucial to security. Having staff members rotate passwords on a regular basis is good common sense. Using strong passwords with a mix of letters, numbers, and symbols helps prevent hackers dictionary attacks. Thankfully, if they should break in, hackers cannot glean passwords from the database, as phpBB encodes passwords in the database using the MD5 one-way algorithm. This prevents intruders from deciphering the passwords in the database should they get that far. This also means that if you forget your password, you will need a new one.

Figure 8-1. The calendar widget in the widget manager area and the Twenty Ten theme Listing 8-1. The built-in calendar widget class WP_Widget_Calendar extends WP_Widget { function WP_Widget_Calendar() { // define widget title and description $widget_ops = array('classname' => 'widget_calendar', 'description' => __( 'A calendar of your blog’s posts') ); // register the widget $this->WP_Widget('calendar', __('Calendar'), $widget_ops); } // display the widget in the theme function widget( $args, $instance ) { extract($args); // apply filters to the given title, or print non-breaking space if empty $title = apply_filters('widget_title', empty($instance['title']) ' ' : $instance['title'], $instance, $this->id_base); // before/after code for widget and title were defined in functions.php echo $before_widget; if ( $title ) echo $before_title . $title . $after_title; // print the inner widget, the part that makes this widget unique echo '<div id="calendar_wrap">'; get_calendar(); echo '</div>'; echo $after_widget; }

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Note The MD5 one-way algorithm has its advantages and its disadvantages. Passwords must be stored

in the phpBB database, but in their encrypted form. When someone logs in to the forum, the password she supplies at login time is encrypted, and that is compared with the encrypted password stored in the database. No decryption takes place, because the MD5 algorithm is a one-way encryption. This has the advantage of passwords being unlikely to be decrypted (never say never!) should any malicious intruder break into your database. However, this means that any passwords cannot be e-mailed to the forgetful board user, which is a small price to pay for the level of security MD5 affords.

// update the widget when new options have been entered function update( $new_instance, $old_instance ) { $instance = $old_instance; // replace old with new $instance['title'] = strip_tags($new_instance['title']); return $instance; } // print the widget option form on the widget management screen function form( $instance ) { // combine provided fields with defaults $instance = wp_parse_args( (array) $instance, array( 'title' => '' ) ); $title = strip_tags($instance['title']); // print the form fields > <p><label for="< php echo $this->get_field_id('title'); >"> < php _e('Title:'); ></label> <input class="widefat" id="< php echo $this->get_field_id('title'); >" name="< php echo $this->get_field_name('title'); >" type="text" value="< php echo esc_attr($title); >" /></p> < php } } Look how little you have to change! Now, I did say that this is one of the simplest widgets. Your widgets might have more options, and therefore a longer form and more fields to update. Still, this is going to be pretty easy, right I ll go through each piece of this widget, starting with the form and working backwards.

All the permissions in the world won t help you if your board has a flaw in its security, which could let Joe Hacker simply slip past those permissions! Fortunately, the phpBB Group regularly publishes updated versions of phpBB that contain security and other bug fixes. Keeping up with these updates, as tedious as it may be (especially if 11 inspires you to install a ton of modifications), is quite important, as updates have been known to be released in rapid succession. While installing updates can sometimes be a pain and an inconvenience, it is even more inconvenient and painful to catch up with a few updates in succession.

The phpBB Group uses several methods of notifying administrators when phpBB upgrades are released. phpBB versions 2.0.13 and later sport an update check, direct from phpBB.com, on the front page of the Administration panel, as shown in Figure 10-3.

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