How to add an “or” instead of and “and” (&) in a WordPress query?

If you have the category ID you can use the category__in parameter eg:

<?php $custom_posts->query(array('category__in' =>array(1,2,3))); ?>

Related Posts:

  1. How to return results of a get_posts() in explicitly defined order
  2. Modify main WordPress loop with a parse_query filter
  3. How should I intercept the main query and inject custom join / order by / group by criteria
  4. Dynamically excluding current page id
  5. How to order results by date and meta key?
  6. Static Front-Page Excerpts
  7. Is it possible to query_posts using post__in and then Loop through them in the ordered they were queried?
  8. query_posts() ALWAYS displays something?
  9. How to remove a plugin filter’s priority on specific loops (custom queries)?
  10. Custom loops, sticky posts, and pagination nightmare
  11. Filter Loop by Custom Field Value
  12. Modify loop but keep the original query, what am I doing wrong?
  13. When to use WordPress loop or Foreach loop?
  14. Post per page not working if no category specified
  15. Calling Posts from Specified Cat
  16. Most Effective Method? Exclude Category and Number of Posts Per Page
  17. How do I query based on the modified date?
  18. Script that gets the first tag of post and query all other posts with the same tag
  19. Modify main loop query for paged and meta key
  20. Create a Loop with Posts Ordered by Most Recent Comments
  21. query_posts and sub pages?
  22. The_content display a different content from a previous loop
  23. WordPress loop problem: Multiple loops, index.php and is_paged causing duplicate posts on next page
  24. Including post data in a sidebar occurring outside of and before the Loop
  25. Multiple loops with / without sticky posts and different post limits
  26. Why query_posts() isn’t marked as deprecated?
  27. How to get posts published between a date and today?
  28. how to query posts by category and tag?
  29. How do I query by post format in WordPress 3.1
  30. How to set posts per page using WP_Query()
  31. Is `query_posts` really slower than secondary query?
  32. Are there any scenarios where the query_posts may be used?
  33. Custom Post Type “Event”: chronological list of recurring events
  34. Order by meta value, pro first, then free
  35. How to create an attachments archive with working pagination?
  36. query_posts and pagination, still stuck after much research
  37. Query posts by taxonomy term name
  38. how could I get the pagination as I want to when query posts using get_posts function
  39. Counter code for paginated category pages in wordpress
  40. Author List page: Exclude based on last post date
  41. Replace query_posts with pre_get_posts
  42. query_posts sort in multiple directions
  43. Filter query_posts by tag slug on “Tag Archive” page (when tag is 2 or more words)
  44. Warning: urlencode() expects parameter 1 to be string, array given in and not getting the preffered output
  45. Query for posts in 2 taxonomies
  46. Using database meta_values to calculate new post order using pre_get_posts or a ‘request’ hook
  47. exclude ids through post__not_in
  48. Exclude category from loop not working
  49. How to dynamically build a multiple taxonomy query loop within a post type’s single loop?
  50. Integrating post archive wtih another source and preserving date ordering
  51. Order posts using a custom array
  52. WordPress query_posts and orderby page order
  53. IF.. post meta show… Conditional Tag Help…?
  54. Show Only Posts Owned By Logged In User + my post
  55. Custom MySQL Query with logic
  56. Query last updated posts (posts updated in the last 24 hours)
  57. order posts by meta value on posts page
  58. Query_post($args)
  59. Show a Category X’s custom post type on Category X archive page?
  60. trouble with query to fetch next and previous posts
  61. Some doubts about how the main query and the custom query works in this custom theme?
  62. How do I make query use exact post title
  63. Simple custom post query for all the posts or many of them not working
  64. Hook to return true when the_post() is used in a custom while loop
  65. My post repeats itself on the second page [closed]
  66. Exclude first post (sticky or not) from the loop using query_posts()
  67. Proper syntax to add boolean in array()
  68. using query_posts to pull posts out of a category in a while loop. Getting odd echo
  69. Echo a numerical value in query_posts
  70. why to use query_posts() in custom page?
  71. Query posts to get all but the most recent post
  72. Always using the same ARRAY on different querys
  73. Include current post into loop
  74. How to provide meta_key array to wp_query?
  75. How to only publish posts with image in it
  76. How do I use pagination in WordPress?
  77. How to make posts unqueryable/unpublish posts where ACF relationship field is an unpublished post? [closed]
  78. Does WordPress run a post query when a page is invoked?
  79. Using functions.php to include code that’s processed inline
  80. Multiple posts/pages in one page?
  81. query_posts clarification needed
  82. Paginate pages with dynamic query
  83. Performance concerns: index.php vs taxonomy-$taxonomy.php
  84. Determine if ID is page or post and query the ID
  85. How to check a list or feed of all posts under a category and tag?
  86. How do I add a timezone offset to this query?
  87. query_posts thumbnail condition
  88. Show posts from specific roles
  89. Latest 5 post excerpts from 5 different authors in Sidebar
  90. Custom Post Types Not Showing Up In query_posts Result
  91. Help with query_posts function
  92. Is there anyway I can call the year once?
  93. How to show post views shortcode data for each post on Posts List Page?
  94. Pull new posts using feed
  95. Div Missing In Custom Loop Query
  96. query_posts() with multiple meta data comparisons
  97. get_posts and wp_autop (remove filter)
  98. Multiple loop for “featured” items returns wrong posts
  99. How to can I search range of products using between
  100. show custom post’s post in two different divs [duplicate]