Is it possible to bind a function to a filter hook via Ajax?

Is it possible to bind a function to a filter hook via Ajax?

No, because page requests are self contained.

When you request something from PHP, everything gets loaded from a fresh clean slate. At the end of the request, that slate is discarded.

This is different from say a Node application that is always running.

So, if you make an AJAX request and unhook a filter, it’s only unhooked for that request. A second page load, or AJAX request will not be affected by the unhooking, so it would need to be done on every request.

If you want something to persist across requests, you need to store it somewhere that persists, such as the database of the filesystem. Either way what you want to do won’t work, and there’s no change to WordPress or PHP you could make that would allow it to work the way you proposed.

Related Posts:

  1. Earliest hook to reliably get $post/$posts
  2. How to pass/get data to/from the WooCommerce data-product_variations object?
  3. How to check if a hook is hooked or not?
  4. Passing Additional Parameters to add_filter Callable
  5. Modify WordPress Rest Api Request/Response
  6. How to add some custom HTML into wordpress admin bar?
  7. Custom theme hooks / filters – passing arguments
  8. How to hook wp_list_pages?
  9. How to make post and comment count unclickable with dashboard_glance_items hook
  10. How to use the_excerpt in a filter hook?
  11. Hook into admin post list page
  12. How to limit the pages displayed for choosing parent page on page attribute’s menu?
  13. How can I hide all posts that don’t have a thumbnail?
  14. Change text of Description in Image Library
  15. Am I using the right hook for removing quicktags on the admin TinyMCE?
  16. About Hooks and Filters
  17. Shortcodes not resolved in AJAX call response
  18. Ajax, filters and shortcodes
  19. Multiple Ajax Data Action
  20. How can I reliably and globally disable wptexturize?
  21. Customise Jetpack Publicize text
  22. WordPress RSS feed – filter RSS content by custom field value
  23. filter the_title problem in nav
  24. Filter the URL of next_posts_link & previous_posts_link
  25. How to get list of all hooks of current theme / plugin?
  26. How to replace any occurence of Gravatars with a local placeholder image?
  27. Sensei LMS Hooks to Remove Content
  28. What hook/filter can I use to add/edit/show/hide the title under (on hover) links on the table view?
  29. Change WordPress RSS link with filter?
  30. Add a header before fields added with the attachment_fields_to_edit() filter
  31. Hide content editor for posts after approriate date
  32. Gutenberg disable the “block” tab in right sidebar
  33. Why my admin doesn’t work after adding rest_prepare_post filter?
  34. add_filter() function misunderstanding
  35. How to set a custom path, for ajax image upload folder in admin?
  36. When to use actions and when to use filters
  37. add_filter to ‘woocommerce_before_main_content’ [closed]
  38. Editing
  39. Same Conditionals Not Working on Two Different Hooks
  40. Filter or Hook to catch pre-rendering of post content
  41. Can the wp_filter object hold multiple values with the same key
  42. check to see if hook is available
  43. apply_filters/do_action tag characters limit
  44. How do I target a single page to modify the comment form of only that page?
  45. How to removes all instances of thumbnails displayed in my theme?
  46. Insert term when page is published – avoid duplicates after edits
  47. How to modify core when there is no hook?
  48. When does a function assigned to the content_filtered_edit_pre filter hook fire?
  49. Capture post content before page renders
  50. Remove_action does not work
  51. Better extend a class or use add filter/action hooks?
  52. Add content as soon starts
  53. Make an array filterable per hook
  54. How do I add a checkmark to my-sites save settings hook
  55. Comment search plugin
  56. How to filter backend post list showing only posts having a shortcode
  57. Add Lightbox To WordPress Native Gallery
  58. Issue understanding and using WordPress filters and actions
  59. How can I replace an oEmbed URL in post with actual embed HTML
  60. Woocommerce “added to cart” message on main(home) page
  61. Detect when gutenberg editor title is available in Dom after editor load
  62. Change custom post type GUID in RSS
  63. filter hook to load a different post/page on current post/page
  64. Remove tags without a specific meta key from “choose from the most used tags”
  65. Redirect to woocommerce checkout after adding to cart – item already in cart
  66. How can I edit comment meta value before it is saved?
  67. How To Get Search Term and Use in Function
  68. Action hook to control access to certain parts of my site
  69. Where exactly does the edit_{taxonomy} hook fire?
  70. Is there any reason for the nested filters to be applied on the first case and not in the second one?
  71. Best practice: Custom Post Type / Filter / Load more
  72. Filter Media by attached page or blog post in Library
  73. How do I add a line break to a string that is output by PHP?
  74. Filter the title to only affect the_title() template function
  75. style_loader_tag not changing stylesheet to preload
  76. AJAX Post Filter
  77. Right filter for rewriting page statuscode
  78. Add filter return false not working
  79. Security question – Display a General Custom Login Error Message
  80. Display post after choice two taxonomy terms
  81. Ajax Filtering Pagination
  82. Filter wp_mail based on content type
  83. get_the_archive_title hook unwanted changes!
  84. How to filter wp_get_recent_posts() to only posts that have thumbnails?
  85. Change add_filter based on Ajax
  86. Hook inside a hook
  87. Code restricted to dashboard, running unexpectedly in the frontend (pre_get_post and admin-ajax.php)
  88. Adding user filter – Not updating data in URL
  89. How to check which submission button was clicked?
  90. Why none of xmlrpc filters work
  91. WP Dashboard -> Posts-> Filter by Category -> Form Method Change : Which Hook
  92. Hide H1 Title using the_title filter
  93. Add class to all parent elements inside the_content
  94. Getting entry ID from frm_email_message filter in formidable
  95. Auto append text after the title?
  96. Better way to change the default password reset url with the woocommerce one?
  97. Hooking/Filtering theme name to add theme directory
  98. Replacing text using add_filter
  99. Passing value from one hook to another
  100. Change password reqts with NO plugin without breaking resetpass link?
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)