WordPress 3.1 introduces several new features including post formats, an improved admin bar, internal linking improvements, custom post types, and taxonomy queries. Beta 2 will be released tomorrow.

1. WordPress 3.1
DC PHP

2. @nacin
Andrew Nacin
andrewnacin.com
nacin@wordpress.org

3. What’s next?

4. Post
formats

5. Admin bar

6. Internal
linking

10. Incremental
improvements

11. UI & UX
(always)

12. AJAX
goodness

14. Network
Admin

17. Taxonomy
queries

18. query_posts('cat=123&author=456');
query_posts(array(
'cat'
=>
123,
'author'
=>
456,
)
);
$myquery['cat']
=
123;
$myquery['author']
=
456;
query_posts(
$myquery
);

19. And
Tag A and Tag B and Tag C
Or
Category A or Category B
Not
Neither Category A nor B

20. And
tag__and, category__and
Or
tag__in, category__in
Not
tag__not_in, category__not_in

21. And across taxonomies
Tag A and Category B
Or across taxonomies
Tag A or Category B
Not across taxonomies
Neither Tag A nor Category B

22. $myquery['tax_query']
=
array(
array(
'taxonomy'
=>
'category',
'terms'
=>
array('foo'),
'field'
=>
'slug',
),
array(
'taxonomy'
=>
'post_tag',
'terms'
=>
array('bar'),
'field'
=>
'slug',
),
);
query_posts(
$myquery
);

23. $myquery['tax_query']
=
array(
array(
'taxonomy'
=>
'category',
'terms'
=>
array('foo',
'bar'),
'field'
=>
'slug',
'operator'
=>
'NOT
IN',
),
);
query_posts(
$myquery
);

24. $myquery['tax_query']
=
array(
'relation'
=>
'OR',
array(
'taxonomy'
=>
'category',
'terms'
=>
array('foo'),
'field'
=>
'slug',
),
array(
'taxonomy'
=>
'post_tag',
'terms'
=>
array('bar'),
'field'
=>
'slug',
),
);
query_posts(
$myquery
);

25. http://otto42.com/81
(required reading)

26. Custom
post types

27. register_post_type(
'members',
array(
'labels'
=>
array(
'name'
=>
'Members',
'singular_name'
=>
'Member',
),
'public'
=>
true,
'show_ui'
=>
true,
'rewrite'
=>
array(
'slug'
=>
'member',
),
'has_archive'
=>
true,
)
);

28. register_post_type(
'members',
array(
'labels'
=>
array(
'name'
=>
'Members',
'singular_name'
=>
'Member',
),
'public'
=>
true,
'show_ui'
=>
true,
'rewrite'
=>
array(
'slug'
=>
'member',
),
'has_archive'
=>
'team',
)
);

29. /team/
/member/nacin/
archive-­‐members.php
single-­‐members.php

30. Have fun
breaking
WordPress

31. Beta 2 will
be released
tomorrow