What exactly do this function declared into functions.php file of a WP theme?

The last line tells WP to run this function on the pre_get_posts hook. That hook is the ideal place to modify the main query that will be run in order to build the page. In this case, exclude_featured_tag() checks whether WP is loading the home page, and whether it’s about to call the main query for the page (as opposed to any other secondary queries being run). Then it modifies the query ($query->set()) to NOT include any post that has tag of ID OF THE FEATURED TAG.

For more on the pre_get_posts hook, see the codex.

Related Posts:

  1. How to obtain the current website URL in my theme?
  2. Function to return true if current page has child pages
  3. List of all theme customizer control types?
  4. Set the transport of the Customizer ‘header_image’ core setting to ‘postMessage’
  5. Why WordPress architecture is not pure object oriented and it don’t use MVC pattern? [closed]
  6. PHP can I add line numbers to file_get_contents()
  7. Create another “Display Site Title and Tagline” checkbox, “Header Text Color” setting and control
  8. Converting HTML Template to WordPress Theme
  9. what is the best practice to add new field to an api route
  10. Retrieve $_POST data submitted from external URL in WordPress(NOT API)
  11. Compare the old get_theme_mod($name) to the new get_theme_mod($name) return value
  12. Redirect to another page using contact form 7? [closed]
  13. Is there a hack for using is_page() within the function.php file?
  14. How to change basename url for wp-admin?
  15. Where can I find the declaration of `$_wp_theme_features`?
  16. A Customizer checkbox control that sets the setting to “” or to “blank” and show() or hide() a color control
  17. My customizer’s setting doesn’t set to the default and needed to click the control’s “Default” button before it’ll be set
  18. WordPress causing all code to be displayed on line 1. Receiving multiple errors after cleaning cookies and cache
  19. How to add button to top of theme customizer?
  20. WP Custom tables query
  21. Capture the Selected Radio Button Value between two files in wordpress theme
  22. Why have on every line
  23. Cleaning up WordPress to improve performance?
  24. Proper use of Output Buffer
  25. Include a external PHP file into a WordPress Custom Template
  26. Need help setting default setting value for radio button in theme customizer
  27. Get author full name
  28. How to remove hardcoded characters from playlists?
  29. function_exists call in function.php
  30. Fatal error: Call to undefined function plugin_dir_path()
  31. How to preserve PHP modifications while upgrading WordPress?
  32. Is it possible to get a theme customizer setting from wp.customize using jquery?
  33. Debugging an error: wp_enqueue_style was called incorrectly
  34. How to get the registered sidebar’s name by its id?
  35. is there a simple way to list every templates / php files used to generate a specific page?
  36. Dynamic URL to reference custom PHP files
  37. Dynamically change feature image in customiser
  38. One button to change all settings in theme customizer?
  39. Change comments form title on a page by page basis
  40. Hide a menu-item and its submenus and display a ‘Log in’ link if the user is logged out
  41. The best way to customize “nav-menu-template.php” to add if the ‘link_before’ is “checkbox”
  42. How to use copy() function and paste file in /wp-content/themes directory
  43. Setting up the child theme so as to enable right-to-left WordPress?
  44. Design view breaking on Pages
  45. Authenticating to WordPress, using my own authentication two-factor system
  46. delete an array element when its date expires
  47. Understanding WordPress child theme custom JS loading
  48. Why is PHP Cookie via plugin only set when logged in as Admin and not regular users? and other questions
  49. How can I loop into two different DIVS without repeating the DIVs
  50. Removing unnecessary wordpress files
  51. How to add default images into theme customizer image control?
  52. Disable External Pingacks on WordPress Posts and Only Allow ‘Self Pings’
  53. Remove css styles from specific page
  54. Is the regular ajax request method safe or I should use admin-ajax.php?
  55. Custom plugin issue when trying to use the shortcode twice on a page [closed]
  56. do not show web page section when using advanced custom fields pro
  57. Overriding a theme redux file in child theme
  58. Widgets not showing in my custom theme
  59. Using wp_get_image_editor in a standalone script
  60. How do I list the_tags() into HTML data-attribute
  61. New Plugin Review
  62. Am I not understanding plugins?
  63. Using Font Awesome as post thumbnail
  64. Can I change a variable in a content part while calling it?
  65. How to make thumbnail image fit into a div where image dimentions are completely different?
  66. How to break down importing of feeds
  67. Custom Logo URL | Help me print the URL of the custom logo I inserted into my theme
  68. Making Quote Plugin more efficient
  69. How to access function from outside of a class within this class in WP plugin?
  70. What is the fastest way to load PHP functions that are only used in one theme template?
  71. My Own layout in WooCommerce pages [closed]
  72. Differences when using the the_time and the_date functions
  73. custom shortcode will not display the wrapped content
  74. Can’t load WP function into external function
  75. Displaying theme options in css
  76. Set WordPress Default Template
  77. Setting custom canonical urls
  78. Trigger popup in a php if/else statement
  79. Customizer: Output default value in Customizer CSS
  80. Adding Default Settings to Theme My Login plugin
  81. How can i upload images in an admin page?
  82. Swapping wp_dropdown_categories function with wp_category_checklist
  83. How to customize a permalink (URL) structure?
  84. How to access global variable $menu inside a class function
  85. How to remove the cufon script from Dzonia Lite theme [closed]
  86. Edit Yoast SEO breadcrumbs output [closed]
  87. Hide categories that are not used in the post type
  88. How can I remove a function that has been added to wordpress with add_filter?
  89. How do I add custom bulk actions to multiple custom post types?
  90. How to set up VS Code for WP plugin/theme development in 2021? [closed]
  91. How to check if a meta value has already been assigned to any user?
  92. filter default query to show just selected level of child pages in wordpress
  93. How to pick the default selected value in wordpress dropdown?
  94. Improve page speed loading using CDN and async or defer attribute
  95. How to call plugin function per site in a multisite?
  96. Error in custom php function doesn’t exist
  97. Customizer: active_callback and sanitize_callback incompatibility?
  98. Populate editor with some content of a page with a page template
  99. Catchable fatal error: Object of class stdClass could not be converted to string after WP 4.7
  100. Menu jumping when calling it via PHP
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)