How i can put $_GET codes in function.php?

function custom_function_redirect() {
if ( isset( $_GET[ 'link' ] ) && $_GET[ 'link' ] != '' ) {
    wp_redirect( $_GET[ 'link' ], 301 );
}else{
    die('test');
 }
}

add_action('template_redirect','custom_function_redirect');

Try this it worked for me.

For redirection you should hook the function in template_redirect

Related Posts:

  1. Upload Multiple Files With media_handle_upload
  2. What is this code in my theme’s functions.php? if (isset($_REQUEST[‘action’]) && isset($_REQUEST[‘password’])
  3. Masking logout URL
  4. Logout/login redirect CSS issue
  5. Paged Single Post doesn’t redirect to the main url after Removing Pagination
  6. redirect wp-login.php to another page
  7. VERY new to coding – keep breaking site trying to add to functions.php
  8. Problem with tag
  9. write in functions.php
  10. How do I redirect upon login a specific user based on role?
  11. Pinterest Integration Using functions.php
  12. Date/time limitation of posts where function must be executed
  13. Completely disable RSS feeds on WP 5.5.2 and show a 404 page instead of die();
  14. Ninja form Redirect depending on text field content [closed]
  15. Redirect specific page in WordPress for first time visit
  16. How do I redirect all 404 error url to Subcategory url
  17. Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘greenday_head’ not found or invalid function name
  18. 404 redirect to previous category
  19. Login Redirect if Logged in from Specific Page
  20. Redirect to another page if the user is logged in when pressing again the login button on menu bar
  21. Incorrect redirect after commenting
  22. How can this crude function be improved?
  23. How to run a function in every page, every device
  24. Why does get_template_directory_uri() not include “www”, only for enqueued stylesheets?
  25. Numbering lines of code with the tag?
  26. Page get parameter doesn’t work with is_single() function
  27. Redirect website domain (including all pages) to external URL after Popup message (few seconds)
  28. Contact Form 7 If Condition
  29. Solved: redirect to another page using functions.php
  30. Redirect to other page if login
  31. Logout Redirect and also WP-login.php Redirect
  32. How to add array [closed]
  33. WordPress website keeps loading the maintenance page
  34. Redirects based on a JSON file
  35. template_redirect action only firing if logged in
  36. How to redirect Subscribers on login to specific page, when logging in from a Page
  37. Save Meta when custom Taxonomy Saves
  38. remove edit link only for published post and pending post
  39. Redirect to one of two pages after data submitted, depending on the current url
  40. Adding a schema code to one specific page using functions.php file
  41. How set a while with a function
  42. Wildcard 301 Redirect Using Theme Function
  43. Competing Login Redirects – Need to be Combined?
  44. Postback redirect through add_action is not triggered
  45. Restrict access if logged out except for homepage
  46. Redirect specific author posts to another url
  47. Drop down list code for sidebar
  48. Custom download page
  49. Some code is added automatically to my site’s header – what is it?
  50. How to include a hyperlink in the body text of a custom password protected form?
  51. How to create a function to redirect a specified page to another page
  52. Language switcher for subdomains
  53. Allow the access over wp-login.php
  54. How to get tags and categories?
  55. How to request login for user but not for bots
  56. How to add a class name to the ancestor of a post?
  57. Making an under maintenance page (without using plugins)
  58. Code in functions.php appearing on front-end and dashboard [closed]
  59. I want to add the alt attribute to all the photos!
  60. Bad value crossorigin for attribute crossorigin on element link
  61. Text before price on WooCom
  62. Template Redirect Function Only Working When Logged In
  63. Convert Image to Webp on upload without plugin
  64. Disable Attachment Page Except for Category
  65. Redirecting after login except for a specific page
  66. Add custom css to specific user
  67. How to redirect using a custom wordpress api endpoint after form submission?
  68. Missing feature image link function
  69. What’s the difference between home_url() and site_url()
  70. Remove “Category:”, “Tag:”, “Author:” from the_archive_title
  71. get_template_directory_uri pointing to parent theme not child theme
  72. How to customize the_archive_title()?
  73. remove empty paragraphs from the_content?
  74. What is the “with_front” rewrite key?
  75. Why use if function_exists?
  76. How to override parent functions in child themes?
  77. wp_enqueue_script was called incorrectly
  78. Add multiple custom fields to the general settings page
  79. Ajax call always returns 0
  80. 400 bad request on admin-ajax.php only using wp_enqueue_scripts action hook
  81. How long does a deprecated function live in core?
  82. Solution to render Shortcodes in Admin Editor
  83. How to add a data attribute to a WordPress menu item
  84. What’s the difference between esc_html, esc_attr, esc_html_e, and so on?
  85. remove_action on after_setup_theme not working from child theme
  86. plugins_url vs plugin_dir_url
  87. Remove type attribute from script and style tags added by WordPress
  88. How to run a function every 5 minutes?
  89. Best way of passing PHP variable between partials?
  90. How to display custom field in woocommerce orders in admin panel?
  91. Adding fields to the “Add New User” screen in the dashboard
  92. Issues with title-tag and document_title_parts
  93. How do I get the current edit page ID in the admin?
  94. How to check if a user exists by a given id
  95. Why isn’t is_page working when I put it in the functions.php file?
  96. Add tags to the section via functions.php
  97. Add image size if page template
  98. How to create a custom order status in woocommerce!
  99. Remove Actions/Filters added via Anonymous Functions
  100. Adding a second email address to a completed order in WooCommerce [closed]
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)