How to check which submission button was clicked?

The function submit_button() does generate:

<input type="submit" name="submit" id="submit" class="button button-primary" value="Save Changes"  />

As seen on the codex documentation page. Which gives you the possibility to check for a $_POST or, depending on the form, $_GET or generic $_REQUEST variable – to be exact for $_POST[ 'submit' ] or $_GET[ 'submit' ] or $_REQUEST[ 'submit' ]. The key for the variable is determined by the input tags name attribute value, which you can change for submit_button() by making use of the $name parameter.

Related Posts:

  1. Better extend a class or use add filter/action hooks?
  2. Gutenberg Block – Post Featured Image Filter Hook
  3. WordPress hooks/filters insert before content or after title
  4. How can I edit post data before it is saved?
  5. How to pass/get data to/from the WooCommerce data-product_variations object?
  6. Passing Additional Parameters to add_filter Callable
  7. Custom theme hooks / filters – passing arguments
  8. wp_mail – Remove sitename from email subject
  9. How to hook wp_list_pages?
  10. WP Rest API – Upload media without saving attachment post
  11. How to make post and comment count unclickable with dashboard_glance_items hook
  12. How to use the_excerpt in a filter hook?
  13. Anyway to edit the titlebar of WordPress Widgets in the Admin area?
  14. How to limit the pages displayed for choosing parent page on page attribute’s menu?
  15. How can I hide all posts that don’t have a thumbnail?
  16. How to exclude certain widget from showing up on home/front page? [duplicate]
  17. How can I reliably and globally disable wptexturize?
  18. Customise Jetpack Publicize text
  19. WordPress RSS feed – filter RSS content by custom field value
  20. filter the_title problem in nav
  21. How can I add a fifth option to the alignment picker?
  22. Filter the URL of next_posts_link & previous_posts_link
  23. How to replace any occurence of Gravatars with a local placeholder image?
  24. Sensei LMS Hooks to Remove Content
  25. What hook/filter can I use to add/edit/show/hide the title under (on hover) links on the table view?
  26. Customize user account activation message
  27. Conditionally call add_action depending on post_type?
  28. Is there a filter hook that I can use to change how taxonomy term names are displayed?
  29. Add a header before fields added with the attachment_fields_to_edit() filter
  30. Error when overriding only some audio shortcode HTML output
  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. When to use actions and when to use filters
  35. add_filter to ‘woocommerce_before_main_content’ [closed]
  36. Editing
  37. Is possible dequeue/remove style from wp_footer() hook and add on wp_head() hook?
  38. Same Conditionals Not Working on Two Different Hooks
  39. Filter or Hook to catch pre-rendering of post content
  40. How to call a function or method that is Namespaced using another plugin
  41. check to see if hook is available
  42. Change username before login
  43. Which built-in WordPress files are safe to edit?
  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. When does a function assigned to the content_filtered_edit_pre filter hook fire?
  48. Capture post content before page renders
  49. Remove_action does not work
  50. Add content as soon starts
  51. BBPress changing default group activity
  52. Make an array filterable per hook
  53. I want to allow the use of a data-flw attribute in links in comments
  54. How do I add a checkmark to my-sites save settings hook
  55. Comment search plugin
  56. How to know what filter to use and how to use it?
  57. How to filter backend post list showing only posts having a shortcode
  58. Add Lightbox To WordPress Native Gallery
  59. What hooks to hook onto for automatic cache clearing
  60. Modify Redux Framework Options in Child Theme
  61. How to customize category_description()?
  62. Detect when gutenberg editor title is available in Dom after editor load
  63. How can I output all apply_filters and do_action?
  64. Set default value for “Additional CSS class(es)” for specific block types
  65. Is it possible to bind a function to a filter hook via Ajax?
  66. How do I hook my function to run only after submitting login form
  67. How to add a filter to the get_body_class function?
  68. Prepending character(s) to a custom tag title?
  69. Modify existing plugin function with add_filter
  70. How to override include_once pointed file using add_filter?
  71. Remove tags without a specific meta key from “choose from the most used tags”
  72. What is the action hook to use if you want to capture the new password during password change?
  73. How can I edit comment meta value before it is saved?
  74. an action hook when a post reaches a certain number of views
  75. WordPress overwrites UNC
  76. Action hook to control access to certain parts of my site
  77. Need to return shortcode text instead of the output
  78. Where exactly does the edit_{taxonomy} hook fire?
  79. Replace Data In Post & Update Meta Field Post Is Saved
  80. Filter Media by attached page or blog post in Library
  81. How to make WordPress search page use a relative path
  82. How to add custom media library mime icons?
  83. Add an attribute to the root from functions.php with add_filter
  84. Would like to use hook or filters to customize email templates
  85. Add filter return false not working
  86. Remove image of srcset
  87. Security question – Display a General Custom Login Error Message
  88. Filter wp_mail based on content type
  89. Add HTML to the bottom of each post in a post list
  90. get_the_archive_title hook unwanted changes!
  91. Incrementing content with extra text after save/publish
  92. wp_editor customization
  93. WP Dashboard -> Posts-> Filter by Category -> Form Method Change : Which Hook
  94. Hide H1 Title using the_title filter
  95. Add class to all parent elements inside the_content
  96. Filter dashboard custom post listing by user
  97. Auto append text after the title?
  98. Admin New Order: Autofocus on Search a product
  99. How to filter part of a variable if it is no array?
  100. Can you call a filter hook by “add_action”?