Is there a limit to the number of options you can store in one settings field of wp_options?

The limit is probably not WordPress specific, but caused by PHP.

max_input_vars might be set to 1000, so not all fields might reach WordPress.

You can store 4,294,967,295 or 4GB (232 – 1) characters in one option, so I don’t think this is your problem. If it is, you should consider a separate table.

Related Posts:

  1. How to pass arguments from add_settings_field() to the callback function?
  2. How to pass variable to add_settings_section() callback?
  3. Difference between Option_Group and Option_Name in Register_Settings
  4. Settings API – creating reusable form elements?
  5. Settings API – changing add_settings_field() output?
  6. register_setting() vs add_option()
  7. Settings API – save an array of options as one setting (array_push?)
  8. Setting ‘autoload’ to ‘no’ with Settings API
  9. How to Save Different Settings Options Using Settings API and/or the Theme Optimizer
  10. Serialized settings in rest api
  11. Can’t output do_settings_sections . Can’t understand why
  12. Settings API – how to update multiple options manually?
  13. Single callback with multiple setting fields
  14. Settings API – how to update options manually?
  15. how can I detect that option value has changed?
  16. How to display some settings for super admin user only using Settings API
  17. Settings API get_option best practices
  18. Custom theme options Radio inputs not saving
  19. Settings API: Change position of custom setting field
  20. Tab from Settings API resetting all options with INSERT INTO [closed]
  21. Getting settings saved two times in settings page with tab
  22. get_option array value defaults and best practices
  23. The Settings API – What is the purpose of default value in register_setting?
  24. settings_fields doesn’t appear to be running
  25. Settings API – Separating PHP and HTML
  26. Two settings_fields in one form
  27. Settings API validation callback
  28. How to save custom settings api fields with custom section fuction
  29. How to retrieve the options from this options page?
  30. Add description to custom plugin setting
  31. Settings API and ‘type’ => ‘font’
  32. ‘delete_option()’ only deleting the value, not the key/value pair
  33. How to add a Reset to Defaults button with Settings API?
  34. Retrieve my custom settings in the settings/ API endpoint
  35. Is it possible to have a global parameter page which allows to configure other plugins in the same place?
  36. Multiple checkbox doesn’t work in wordpress settings api
  37. Is there a standard technique or API for getting the site header image?
  38. Help to create the best plugin settings!
  39. How to save Checkbox-Options in Plugin Options Page
  40. Problem with checkbox in Settings API
  41. Options saved and called in wrong order
  42. User specific settings, limited by role
  43. Access saved Options / Settings
  44. Dynamically Update Key in Associative Array When Saving Settings
  45. Incorporating the Settings API in WordPress Themes – by Chip Bennet
  46. How to add options for Pages?
  47. options validator input is false?
  48. Best place to store company address
  49. Where to adjust presets for slider options “auto rotate” (3, 5, 10, 15 seconds)? [closed]
  50. change backend header options
  51. Why does WordPress use serialize rather than json_encode for the options table? [duplicate]
  52. Plugin options will not save in database
  53. How to Create a Custom WordPress Install Package?
  54. Where to hook register_settings for Settings API when also want to update options outside of Settings API?
  55. How much string content can I store in an option?
  56. How should I use register_setting, add_settings_section, & add_settings_field in my plugin’s options page?
  57. Possible to add another setting to ‘Front page displays’ setting for Custom Post Type
  58. Setting the uploads directory
  59. Can I use a space in an option name/key?
  60. display all posts in wordpress admin crashing after 999 screen option
  61. Putting my site live
  62. Can’t get plugin settings page to save data
  63. Settings API – sanitize_callback is not called and it leads to an incorrect behavior
  64. Add an option to a Child theme of Twenty Eleven
  65. How to store a value on WP_option table
  66. Custom blog settings
  67. wp_usermeta wp_usersettings
  68. How to get specific setting by settings_fields()?
  69. How to set wp_editor to be email friendly?
  70. Whitelisting items from custom options page
  71. Work flow for multiple developers
  72. i changed my wordpress address url in SETTINGS – GENRERAL – wordpress address site url. cannot login anymore
  73. Update problem with update_option() in combination with register_setting()
  74. Functions to edit wp-config.php [duplicate]
  75. Show the submitted values in the form when validation fails
  76. Transients API conditional
  77. Is there any other place – besides a theme, a plugin, or a mu-plugin – that an option page might conceivably be used?
  78. Can I use register_settings and unregister_setting once the settings page has loaded?
  79. Issue on Checkbox with Custom Option Page
  80. Which Hook can I use when creating unique post but not update/save/delete
  81. Settings API: Setting default option via ‘get_option’ fails
  82. How to use update_option() without replacing/losing the old value?
  83. Create a counter variable in wp_options that increments when submit button is pressed
  84. WordPress Settings API settings not saving for some users
  85. Sharing Buttons not Working – Sharing Settings [closed]
  86. Character \ appearing before ‘ after saving a settings page
  87. PHP class to add pages and fields in admin panel
  88. How to save Setting pages data to the database?
  89. get_option() and update_option() in a transaction (for an autoincrement value)
  90. display category name based on its equivalent id
  91. Call require_once form admin page with checkbox
  92. How to save the option’s new values plus old value without overwrite old one
  93. WordPress Boilerplate Plugin doesn’t see callback functions for add_settings_field and add_settings_section
  94. add image in dropdown select
  95. WordPress options text format
  96. Caching of SQL queries
  97. Only show theme option if it option exists
  98. Custom general settings (textarea field) don’t output HTML correctly
  99. Using get_option() for check box field
  100. If Home Page Do Nothing, If All Else Show This Content