How to keep users unique id stored in session in addition to IP in WordPress plugin?

It depends how you want to uniquely identify users. Some options to uniquely identify people might be the:

  • The WordPress User ID. If people are logged in then using their WP User ID is a good option.
  • The WordPress session ID. This is unique to the session; People will get a new session after some amount of time, and if they change browser or clear their cache, etc.
  • The Browser User Agent. This is another option that will change less frequently but still might change, but will solve your problem quickly

Whatever you choose, you can simply change both of these lines in your code to user more specific method. E.g. I would suggest trying IP + User Agent:

$user_IP = $_SERVER['REMOTE_ADDR'] . $_SERVER['HTTP_USER_AGENT'];

This will mean each like is then unique to IP plus browser user agent string, which should solve the problem you stated.

Related Posts:

  1. Where the Nickname is being used in WordPress
  2. Confusing problem with displaying message recipient metadata
  3. Building a scalable WordPress favouriting plugin – one serialised meta value array or many meta records
  4. delete_user_meta Delete one value out of array
  5. Upload files programmatically to users
  6. Current user in plugin returns NULL
  7. update_user_meta add value on the top on existing value
  8. Set user ID at time of wp_create_user
  9. Average Account Age
  10. How to get current post user id
  11. New User Form – Custom Menu Page
  12. Modifying Author Link to add Author Meta in URL
  13. How can I change the meta_key for a particular piece of information?
  14. Shortcode to update user meta
  15. How to get all posts belongs to a user between a certain date
  16. Add User Role: Pre-saved in User-Meta [SOLVED]
  17. Search users with custom meta data
  18. WordPress /users/me endpoint request forbidden
  19. Disable Author Archive just for certain roles in bulk
  20. Auto populate a user custom field from another user custom field
  21. Access remote SFTP server via WordPress login?
  22. User updating their profile wipes my custom fields
  23. How To Export User’s Custom Fields in CSV or XLSX
  24. Get all user meta_keys and then group users by matching values
  25. Does a plugin’s “main” file need to be named the same as the folder containing it?
  26. Symlinked plugin directory doesn’t appear in Admin
  27. How do I unlock a post programmatically?
  28. Customizing subject in comment notification e-mails
  29. User-Specific Timezones? Hack? Plugin?
  30. enqueue script only if it is not already enqueue
  31. How can I limit functionality in one version of a plugin?
  32. Plugin child folder?
  33. merging an array to an existing array using add_filter
  34. Is it possible to set up multistore in Woocommerce? [closed]
  35. Displaying a Welcome Message to a Woocommerce User
  36. Retrieving plugin options value saved through setting
  37. How to ‘clone’ a wp plugin to make small changes
  38. Simple ajax call not working in wordpress plugin
  39. How to save post change url youtube link?
  40. __callStatic method handler passed to add_action causes bug in PHP
  41. New databes tables with – WooCommerce – for developers [closed]
  42. Plugin-generated pages use Not Found or Pages Archive templates?
  43. 306 MB of wp_options occupied by WordPress SEO Plugin, is that normal? [closed]
  44. How can I copy all users to newly created site on a multisite network in WordPress?
  45. Perform internal redirect in WordPress?
  46. How to prevent plugins from loading jQuery
  47. Display custom content using page.php from theme
  48. WordPress error: Options page Setting_ not found in the allowed options list
  49. What is wordpress way to access a plugin’s classes/models to load custom post type data?
  50. Associate multiple email addresses with the same user account, so they can log in with either
  51. Translations for my plugin don’t show up
  52. flush_rewrite_rules() not working with update_option_{$option}
  53. Update a user profile via frontend
  54. How to ignore extra whitespaces in translation functions like _e?
  55. How does translation (gettext) work for translating config file of plugin?
  56. Is there a better way of handling AJAX requests in WordPress?
  57. how to add a comment button to be displayed only for the posts in the home page [closed]
  58. Plugin permissions for Editor role
  59. The “Child Pages Shortcode” plugin, block template
  60. using wp_footer hook in a plugin
  61. How to get a custom page through plugin?
  62. How to data add to table when update post wordpress? when we clicked!
  63. can’t unzip file
  64. WooCommerce – I want to add functionality of one plugin to another plugin — best approach?
  65. Want to create custom design of progress indicator in wpforms
  66. Check if theme supports sidebar
  67. Change plugin descriptions
  68. How to display the custom post related blog by category?
  69. WP Forms not displaying,becomming an fatal error
  70. How to create a page with the selected template after activating the plugin
  71. I enabled debugging but I still get the same message: There has been a critical error on your website
  72. wp_mail function not working in WordPress Plugin Boilerplate
  73. When/where would want to attach other classes to the base class in a WordPress plugin?
  74. Using foreach loop for `$instance` of form and update array widget iteration
  75. How to call a function from inside class to outside class
  76. Use Case: Multiple Shipping Methods per Order
  77. Showing how many times is plugin activated or deactivated
  78. Could someone maybe point me in the direction of a decent tutorial on how to create a wordpress plugin that is compatible with another plugin please?
  79. Custom plugin which downloads updates from custom endpoint, extracts new version zip into a new name
  80. wp meta_query meta_value compare =REGEXP delimited by space
  81. Create shared actions for admin and users with plugin bolierplate
  82. How to insert variable which contain array value in wp_options table?
  83. How to Insert images in WordPress using code
  84. shortcode which is introduced into entry the blog, and appears in side bar
  85. Multiselect value in wp_query
  86. How to Overwrite validate_plugin function
  87. how to load a file from a plugin when a url is passed
  88. Is it possible to cancel a post status transition?
  89. Form data to wordpress DB
  90. Register additional wp plugin directory
  91. WordPress User Portal
  92. How to include a custom thumbnail with my WordPress plugin?
  93. How to display blog posts only authored by the administrator
  94. Send email notification when meet the condition
  95. Create Unique and Customized User ID for Website Members in WordPress
  96. Cannot edit Sidebar in any theme in wordpress
  97. how to update wordpress plugin programmatically using plugin path
  98. Testing Plugin – Install plugin dependencies in testing enviroment
  99. Email notification when registred user clicks a link/visits page
  100. Automatically download dependent plugins from WordPress.org?