WordPress Developers Israel Meetup #1

WordPress Developers Meetup
15/04 - #WPDevIL

yoav@farhi.org, @yoavf

Today we’ll talk about...

Intro, WordPress developers meetup
New features in recent versions
3.0
Getting involved with WordPress development
Q&A

Features History

http://www.ﬂickr.com/photos/nostri-imago/

2.7
• Completely new interface

2.7
• Comment threading

2.7
• Plugin repository

2.7
• Child themes

2.7
• Child themes
• Automatic upgrades

2.8
• Integrated theme repository

2.8
• New widgets interface and API

Easy Widgets
class MyWidget extends WP_Widget {
function MyWidget() {
$this->WP_Widget('MyWidget', __('My Widget'));
}

function widget($args, $instance) {
?>
Hello, World!
<?php
}
}

add_action('widgets_init', create_function('', 'return
register_widget("MyWidget");'));

Easy Widgets
class MyWidget extends WP_Widget {

function MyWidget() {
$widget_ops = array( );
$this->WP_Widget('mywidget', __('MyWidget'), $widget_ops);
}

function widget($args, $instance) {
}

function form( $instance ) {
}

function update( $new_instance, $old_instance ) {
}
}

2.8
• Better custom taxonomies

Taxonomies

function people_taxonomy() {
register_taxonomy( 'people', 'post',
array( 'hierarchical' => false, 'label' =>
'‫;) ) 'אנשים‬
}

add_action( 'init', 'people_taxonomy', 0 );

2.8
• Better custom taxonomies
• Speed

2.9
• General Undo/Trash feature

2.9
• Built in image editor

2.9
• Easier video embeds (oembed)

2.9
• Custom post types

2.9
• Post thumbnails

So, what’s in the bag?

© Keren Segev, with permission

Backgrounds

// functions.php
add_custom_background();

Headers
//functions.php
define( 'HEADER_TEXTCOLOR', '' );
define( 'NO_HEADER_TEXT', true );
define( 'HEADER_IMAGE', '%s/images/headers/default.jpg' ); // %s is theme dir
define( 'HEADER_IMAGE_WIDTH', 775 );
define( 'HEADER_IMAGE_HEIGHT', 200 );

add_custom_image_header( '', 'mytheme_admin_header_style' );

function mytheme_admin_header_style() {
?><style type="text/css">
#header {
background: url(<?php header_image(); ?>);
}
</style><?php
}

Headers
// functions.php

register_default_headers( array (
'berries' => array (
'url' => '%s/images/headers/berries.jpg',
'thumbnail_url' => '%s/images/headers/berries-thumbnail.jpg',
'description' => __( 'Berries', 'mytheme' )
),
'cherryblossom' => array (
'url' => '%s/images/headers/cherryblossoms.jpg',
'thumbnail_url' => '%s/images/headers/cherryblossoms-thumbnail.jpg',
'description' => __( 'Cherry Blossoms', 'mytheme' )
)
) );

<p class="nocomments"><?php _e('Comments are closed.', 'kubrick'); ?></p>
<?php } ?>

<?php if ( comments_open() ) : ?>
<div id="respond">
<h3><?php _e('Leave a Reply', 'kubrick'); ?></h3>
<div class="cancel-comment-reply">
<small><?php cancel_comment_reply_link() ?></small>
</div>
<?php if ( get_option('comment_registration') && !$user_ID ) : ?>
<p><?php printf(__('You must be <a href="%s">logged in</a> to post a comment.', 'kubrick'), get_option('siteurl') . '/wp-login.php?redirect_to=' . urlencode(get_permalink())); ?></p>
<?php else : ?>

<form action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post" id="commentform">
<?php comment_id_ﬁelds(); ?>

<?php if ( $user_ID ) : ?>

<p><?php printf(__('Logged in as <a href="%1$s">%2$s</a>.', 'kubrick'), get_option('siteurl') . '/wp-admin/proﬁle.php', $user_identity); ?> <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?action=logout" title="<?php _e('Log
out of this account', 'kubrick'); ?>"><?php _e('Logout »', 'kubrick'); ?></a></p>

<?php else : ?>

<p><input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="22" tabindex="1" <?php if ($req) echo "aria-required='true'"; ?> />
<label for="author"><small><?php _e('Name', 'kubrick'); ?> <?php if ($req) _e("(required)", "kubrick"); ?></small></label></p>

<p><input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="22" tabindex="2" <?php if ($req) echo "aria-required='true'"; ?> />
<label for="email"><small><?php _e('E-mail (will not be published)', 'kubrick'); ?> <?php if ($req) _e("(required)", "kubrick"); ?></small></label></p>

<p><input type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="22" tabindex="3" />
<label for="url"><small><?php _e('Website', 'kubrick'); ?></small></label></p>

<?php endif; ?>


<p><textarea name="comment" id="comment" cols="58" rows="10" tabindex="4"></textarea></p>

<p><input name="submit" type="submit" id="submit" tabindex="5" value="<?php _e('Submit Comment', 'kubrick'); ?>" />
<input type="hidden" name="comment_post_ID" value="<?php echo $id; ?>" />
</p>
<?php do_action('comment_form', $post->ID); ?>

</form>
<?php endif; // If registration required and not logged in ?>
</div>
?>

Pluggable Comment form

//comments.php
comment_form();

Navigation menu
// functions.php
add_theme_support( 'nav-menus' );

//header.php
wp_list_pages('title_li=');
wp_nav_menu();

* Will also work in a widget, with all widget enabled themes

Custom Post Types
function post_type_reviews() {
register_post_type('reviews', array(
'label' => '‫,'ביקורות‬
'singular_label' => '‫,'ביקורת‬
'description' => '‫,'ביקורות תוספים לוורדפרס‬
'public' => true
));
}

add_action('init', 'post_type_reviews');

2010 - The perfect example

Showcase for 3.0 new features


Complete, yet ﬂexible


Internationalized and translation ready


Internationalized and translation ready
Fully documented

A parent for your child theme
/*
Theme Name: My New Theme
Description: Child of Twentyten
Version: 0.1
Author: Yoav Farhi
Author URI: http://blog.yoavfarhi.com
Template: twentyten
*/

A parent for your child theme
/*
Theme Name: My New Theme
Description: Child of Twentyten
Version: 0.1
Author: Yoav Farhi
Author URI: http://blog.yoavfarhi.com
Template: twentyten
*/

@import url(../twentyten/style.css); //optional

Multisite

// wp-config.php

define( 'WP_ALLOW_MULTISITE', true );

• Custom Background / Header

3.0


3.0
• Pluggable comment form


3.0
• Navigation menu


3.0
• Navigation menu
• New default theme


3.0
• Navigation menu
• Multisite


3.0
• Navigation menu
• Multisite
...

Don’t be afraid,
use the trunk

Staying
connected

http://www.ﬂickr.com/photos/versageek/

Staying Connected
• Trac, directly or via RSS or twitter (@wpdevel)
• Weekly dev chats on irc #wordpress-dev
(Freenode)
• The development updates blog:
http://wpdevel.wordpress.com/

Contributing

Testing
Translating
RTLizing
etc...

Next time?
Caching
Security Buddypress

UGC SEO
SVN

E-commerce
Plugins 101

WordPress Developers Israel Meetup #1

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Editor's Notes