Can I use register_settings and unregister_setting once the settings page has loaded?

Better to avoid such a thing. The settings API has two “faces”, one the UI, and the other is handling the form submission. The form submission is handled on a different URL than the UI (/wp-admin/options.php) and therefor your “user action” depended code will not run and the handling of storing the setting in the DB might fail.

You need to register properly all fields, and then you can use CSS or JS to show/hide the relevant UI.

Related Posts:

  1. Custom plugin settings: clicking “save changes” does not display success message
  2. How to get specific setting by settings_fields()?
  3. How to make sure settings are not lost when plugin is updated?
  4. How to save Setting pages data to the database?
  5. How to save the option’s new values plus old value without overwrite old one
  6. WordPress Boilerplate Plugin doesn’t see callback functions for add_settings_field and add_settings_section
  7. How do I add a textarea (multirow) option to my WordPress plugin?
  8. Validating values using Settings API?
  9. move setting data from wordpress api to codestar freamwork
  10. When to store store plugin options as a single database record?
  11. Where can I find a schema of wordpress plugin core architecture?
  12. How to Loop Plugin Option Field Set?
  13. How to find out if option exists but is empty?
  14. How should I use register_setting, add_settings_section, & add_settings_field in my plugin’s options page?
  15. How to handel multiple checkbox field in the admin settings page with Settings API
  16. How can I include a setting that has a variable number of values in a settings page using register_setting?
  17. Saving Plugin settings to the database
  18. How to fetch serialized data from wordpress options
  19. Get all options saved by another plugin
  20. Add a Custom Permalink option in the Permalink Admin Screen?
  21. Settings API – input always updates over validation
  22. add action wp_head not working
  23. Wp die causing 500 Internal Server Error?
  24. Why is the Settings API is not saving my array of options
  25. Can’t get plugin settings page to save data
  26. Default Plugin Settings Not Writing to Database
  27. Update Option Error: Notice: Undefined index
  28. Why this global array is returning NULL from a callback function
  29. Serialize data for wp options
  30. How can I add an options page for my class based plugin?
  31. Get plugin option in another PHP file
  32. Add Plugin options as subpage to Theme options page
  33. Show admin notice on incorrect value on form field
  34. php page not found for plugin options menu
  35. Checkbox conflict in my custom plugin admin page
  36. add tabs in rdp-plugin/includes/settings.php and get settings saved
  37. Change the display of Settings API (do_settings_sections)
  38. Redirect to another page using contact form 7? [closed]
  39. Settings API saved values not getting shown in the dropdownbox
  40. WordPress error: Options page Setting_ not found in the allowed options list
  41. update_option_{$option} not showing old value
  42. How to prevent plugins from sniffing/stealing other plugins’ options?
  43. get_option / wp_localize_script Not Working in OOP Plug In
  44. Update WP option by plugin
  45. How to save plugin custom settings page fields
  46. Need to add/remove group of options and display them as rows
  47. How to get values from network settings panel?
  48. wp_options not returning value for logged out users?
  49. Problem with MEMCACHE and Redis with wp_options
  50. Plugin Options Page and Subpage
  51. WP options plugin setting not saving the selected checkboxes
  52. Echo custom admin field into a is_single()
  53. Protect WordPress option value
  54. Why is the WordPress update_option not working in this code?
  55. How to create a new database table whenever user changes options
  56. Option page not updating multiple records in settings api
  57. Create Array from data in the OPTIONS table
  58. Saving an array to get_options
  59. Building a simple “settings” plugin to change textstrings on the home page
  60. My first plugin doesn’t save the data in options
  61. How to access values from your own settings page in javascript?
  62. Uninstall, Activate, Deactivate a plugin: typical features & how-to
  63. Best way to initiate a class in a WP plugin?
  64. Upgrade 4.5.2 to 4.5.3 deleting row in wp_options table
  65. How do you debug plugins?
  66. How to structure a plugin
  67. What’s the preferred method of writing AJAX-enabled plugins?
  68. Add multiple plugin directories
  69. What are the differences between WPINC and ABSPATH?
  70. How to add a shortcode button to the TinyMCE editor?
  71. Where do I put the code snippets I found here or somewhere else on the web?
  72. What Plugins Demonstrate Great WP Plugin Development? [closed]
  73. is_plugin_active function doesn’t exist
  74. ‘Global’ settings page for multisite plugin
  75. Delete WordPress plugin Repository
  76. Custom pages with plugin
  77. How to change a user’s password programatically
  78. “Error: Options Page Not Found” on Settings Page Submission for an OOP Plugin
  79. Is get_option function cached?
  80. Who are the most trusted plugin developers? [closed]
  81. How can I find plugins’ slug?
  82. List all sidebar names?
  83. What are the common security flaws I need to look for? [closed]
  84. How to add field for new site-wide option on Network Settings screen?
  85. Get plugin_dir_url() from one level deep within plugin
  86. Pass PHP variable to javascript
  87. Contact form 7 select box different value-text than content-text in option [closed]
  88. Where is the best place to use add_filter
  89. Can a developer adopt a plugin marked as “not updated in over 2 years”?
  90. Conditionally enqueue a widget’s script/stylesheet in HEAD (only when present on page!)
  91. What are the advantages to the Settings API?
  92. How to implement WordPress plugin update that modifies the database?
  93. What is difference between get_bloginfo(‘url’) and get_site_url()?
  94. Custom media upload content for inserting custom post shortcode
  95. Stop a plugin in the activation process when a certain WP version is not met then show error message in admin_notices action hook
  96. Where to store plugin settings fields
  97. How to Add a Third Level Sub Menu to the WordPress Admin Menu
  98. How to Add an Index to Plugin Database table
  99. Does the number of downloads displayed for a plug-in in the WordPress.org plug-in directory include automatic updates?
  100. how to create child WordPress plugin
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)