update_post_meta() throws Uncaught error: Cannot create duplicate attribute

update_post_meta() throws Uncaught error: Cannot create duplicate attribute

Related Posts:

  1. post formats – how to switch meta boxes when changing format?
  2. Adding an assisting editor box to Post page
  3. Metabox Data not being saved [closed]
  4. Options to get my custom post type metadata via the WordPress API
  5. Add box with custom per-page properties
  6. add post meta front end edit
  7. I can not display meta value in extras.php and template-tags.php
  8. Add post meta data date to event
  9. Check if any meta on the post has value then display content
  10. Get or set values in post meta
  11. I created a Custom Meta Box but it is not displaying the value on my post page
  12. Remove action of an external plugin after checking if custom post meta is set
  13. How we insert values into database using metabox WordPress?
  14. Post meta box data not saving
  15. How do I retrieve the slug of the current page?
  16. How to extract data from a post meta serialized array?
  17. How to save an array with one metakey in postmeta?
  18. WordPress is stripping escape backslashes from JSON strings in post_meta
  19. Lack of composite indexes for meta tables
  20. Content hooks vs User hooks
  21. How to batch update post content with custom post meta value
  22. Detect meta value changes when post is updated (post_updated)
  23. Check if meta key value already exists
  24. Save both current and new version of post meta
  25. get_post_meta / update_post_meta array
  26. Custom Meta Boxes – Nonce Issue – Move to trash issue
  27. Displaying Meta Box Image
  28. Triple meta_key on custom SELECT query
  29. update_post_meta not adding anything.(Nor add_post_meta)
  30. Identifying Importer Posts
  31. How metadata API works?
  32. Why is variable value emptry in $_POST but available in $_REQUEST?
  33. How to sanitize post meta field value?
  34. Post IDs missing on delete_postmeta action hook
  35. Create a Metabox that behaves Like a Taxonomy Box
  36. Views count with time limit per IP
  37. get_post_meta is returning image id
  38. order by multiple meta_keys?
  39. how to save multiple checkboxes value in wordpress dynamically
  40. echo image caption
  41. get_*_meta doesn’t always return an array
  42. Generate multiple goo.gl shortlinks for qtranslate bilingual blog
  43. A better way to add a meta box to custom post types
  44. How can I convert postmeta from unserialized to serialized?
  45. Meta value does not save for scheduled posts
  46. add_post_meta adds meta to one more different post
  47. get_posts in meta box dropdown not showing latest posts
  48. How to prevent further updates of custom meta when using actions to set one meta based on another
  49. Can’t publish custom post type – “You are not allowed to edit this post.”
  50. Custom query, multiple custom keys
  51. Trying to get property of non-object error using get_post_meta()
  52. get_post_meta producing white screen of death
  53. update_post_meta not working in plugin
  54. Look up all posts by status or meta value – performance difference
  55. Displaying a div from an assigned meta_value when on a page
  56. Can A Post Meta Field Store multiple values that are not in an array?
  57. esc_attr on get_post_meta [closed]
  58. Sort custom posts in archive by multiple values: date AND meta key
  59. Parse a text area custom meta box and assign as value to existing meta keys
  60. How to modify the output of wp_terms_checklist when used within the built-in category metabox on edit posts?
  61. How is the author’s name given a different color?
  62. Adding custom meta boxes to specified custom post type
  63. Custom post type suddenly stoped working after WordPress 5 update
  64. How does WordPress treats attachments metadata in post content?
  65. URL to Post Meta [closed]
  66. Retrieving post meta array (attachment)
  67. Why is variable that get_post_meta stored in empty?
  68. Related posts meta_query CPT
  69. Stop `update_post_meta` from working each time page refreshes?
  70. Meta box with front-end styling
  71. Cannot Save MetaBox Data in Custom Post Type
  72. get_post_meta in one post only
  73. wpdb->get_var – count author posts, meta value
  74. Search post overlapping dates – meta_query with meta_key
  75. Post Publish date not display on Umaya Child themes
  76. How to merge the database results into single result?
  77. How can I update this array built from post meta data?
  78. How to improve my non-unique metadata MySQL entries?
  79. How to get the total of two meta values from different meta keys?
  80. Using a comma instead of a pipe to separate metadata
  81. show user based on user_meta
  82. Meta keys won’t add using wp_insert_post
  83. Metaboxes in Loop
  84. Custom meta box data not saving
  85. Saving custom fields for WP_Query to retrieve
  86. Collect custom post in a calendar
  87. How Can I extract Image urls from post meta
  88. Custom meta box not saving values of radio buttons in WordPress
  89. Twenty Twelve entry meta data – change and move
  90. Humanmade | Custom meta box class: How to display a repeatable meta box group?
  91. Sorting meta box values by start- and enddate and all dates in between
  92. Use an id on a button to update_post_meta in post
  93. Updating post meta and Meta Box plugin
  94. get_post_meta image width for lazy load
  95. Custom Fields help
  96. WP-API : post_meta not updated… but have another entry
  97. Parse error thrown by get_post_meta [closed]
  98. How to get all the related ids without array?
  99. wordpress query making site very slow
  100. if condition from post_meta not working in save_post
techhipbettruvabetnorabahisbahis forumuedusedueduedueduseduseduseduseduedus