hook that when page is starting to load

Well, when exactly do you consider the page to be “starting to load”?

get_header() is typically the first function to fire as the html of a theme is starting to generated. It fires the get_header action. Numerous hooks fire prior to that, at different points, the very earliest being muplugins_loaded I believe.

wp_loaded, by the way, is not when the page has fully loaded but only after WordPress has loaded. There is a difference. A number of things happen before the page is created and sent to the browser.

Related Posts:

  1. WordPress and event-driven programming – what is it about?
  2. Receiving Stripe Webhooks on a wordpress website
  3. Change the footer text on the login page
  4. How to remove a metabox from menu editor page?
  5. Multiple wp_schedule_event cron jobs in plugin cause multi-execution
  6. Audio Player not loading when the content is loaded through Ajax, MediaElement.js no applied
  7. Hooking new functions to actions + passing parameters
  8. Find variables available at a given hook
  9. Passing data between two hooks in separate HTML requests
  10. Replace existing content from specific WooCommerce admin orders list column
  11. enqueue hover function
  12. How To Change The Html of Products filtration sidebar in Woocommerce?
  13. Insert all post IDs in new database table
  14. WooCommerce: Add Payment Gateway Field to Webhooks [closed]
  15. action hook wp_head higher priority as all other plugins/hooks
  16. using add_action for a header hook that has an additional parameter
  17. How to call function at the bottom of post using plugin?
  18. Randomise upload filenames (or another solution to hide the original image URL from theft?)
  19. Setting up 2 SMTP accounts: 1 for wordpress and 1 for woocommerce
  20. wp_loaded hook block script enquequing
  21. Remove an action hook within a Class
  22. How to pass arguments to add_action() or retrieve return value of called function?
  23. ajax, right way to do it and make it works?
  24. Sending data from custom inputs in WordPress comment form in the admin notification email
  25. Edit incorrect password message WordPress
  26. Reload part of checkout on changed shipping method
  27. Contact Fom 7 – how to add custom HTML inside span.wpcf7-form-control-wrap AND IMMEDIATELY AFTER input.wpcf7-form-control?
  28. Woocommerce: hook action/filter I could use to add variation id and price with each attribute opt on WooCommerce Rest api
  29. Remove metabox from WordPress menu editor page?
  30. Remove a div from RSS feed
  31. Is it possible to intercept all ajax requests and get the parameters and the returns?
  32. Set meta field to publish date + 2 weeks
  33. How to add an arrow to menu items has submenus
  34. WordPress Gravatar filter is removing my custom attributes
  35. Error in custom php function doesn’t exist
  36. Generating an nonce for Content Security Policy and all scripts – How to make it match/persist for each page load?
  37. Don’t insert if permalink is the same?
  38. Adding widgets to my plugin page instead of WordPress dashboard
  39. Modify custom field input data before creating a new post
  40. how to make custom ajax handler?
  41. Are all hooks/functions tied to Kses meant for sanitization?
  42. Why does wp_head hook my functions to the beginning of my source code?
  43. Pass argument to event hook
  44. How to remove woocommerce_breadcrumb() from do_action( ‘woocommerce_before_main_content’ ); [closed]
  45. Omit custom post type from wp-sitemap.xml based on meta key using wp_sitemaps_posts_query_args
  46. How to remove the message ‘We could not find any results for your search’ without changing template files and without adding posts/pages?
  47. Get access to variable from previous pageview, excluding ajax-calls
  48. How to catch wordpress post ID when it’s published
  49. Why does the post_type_link hook everything twice?
  50. How to have different site identity logos on each page on Astra Theme [closed]
  51. How can I hook into the wp_mail function used by BackWPup?
  52. Send notification email to admin for every new post published
  53. Adding function to child theme’s function.php
  54. Comapare get_user_meta value
  55. Add a custom class to the body tag using custom fields
  56. Why doesn’t global $wp_query not get hooked?
  57. Creating customized php files in theme folder
  58. How to pass hook variable to function?
  59. save_post trigerred twice
  60. How to sort WooCommerce products page by latest in-stock items first?
  61. Replace a single variable with add_filter
  62. Removing “There is no account with that username or email address.” error message in “/wp-login.php?action=lostpassword”
  63. How do I add a function to parent theme
  64. Prevent header and footer from loading on specific pages with template or plugin
  65. Contain multiple page templates in one PHP custom template file in WordPress?
  66. Show full post instead of excerpt
  67. Use wp_head hook on template page
  68. Adding custom field to product category and show it to shop/category shop page
  69. Trouble Accessing Gravity Forms API (GFAPI)
  70. How to edit post meta data before publishing the post it self wordpress?
  71. Fatal error: Uncaught Error: Class ‘WP_Block_Styles_Registry’
  72. Custom meta box is not displaying value showing tag as empty
  73. using filter and hook inside class
  74. Get original value in save_post action hooka
  75. get Woocommerce product format json for WP_Query
  76. Register/enqueue scripts only on certain admin pages
  77. How do I get the value of a current user’s custom field?
  78. Is there an option to execute javascript file only on plugin activation
  79. How do I remove an action hook inside a class that is called by another class?
  80. Need to forward Data from WooCommerce Webhook sent to same site WordPress REST API custom endpoint
  81. Help hooking into user_register
  82. add_filter() inside another add_filter()
  83. Hook into all password resets in WordPress and get password before hashing?
  84. Getting page / post URL on publish and / or update
  85. Fatal error when using array_diff() function inside of wp_update_nav_menu hook?
  86. Why transition_post_type hook is called twice for the same post?
  87. How can I move the posted-on date above the post and below the entry-header?
  88. Post formating on Home page
  89. WordPress HTML Helper
  90. calling a function from a class in your template
  91. Cannot modify header information – headers already sent
  92. Change Checkout “Place Order” text if cart has a specific product
  93. Send a custom notification to customer on WooCommerce cancelled order status
  94. Add/alter image attribute before render
  95. transition_post_status hook, works – but not if the post is new
  96. php was updated – critical error [closed]
  97. Facing Problem While Running WordPress Hook For Archive, Categories, Author, Date Pages Only
  98. Woocommerce – add tracking code to another email template
  99. how to append ACF field data using one of the following filter/ hooks
  100. Add Imports to Existing WordPress Import Map