using `require` in my functions.php breaks the site

Related Posts:

1. get_template_directory_uri pointing to parent theme not child theme
2. Include PHP file in Content using [shortcode]
3. Adding extra SVGs to TwentyNineteen child theme using class TwentyNineteen_SVG_Icons
4. What is the most efficient method for loading widgets in functions.php
5. PHP files included in functions.php don’t seem to work
6. Include files in child themes, declare in functions.php
7. Calling a Function in Functions.php from an external PHP script
8. Automatically include all php files in a child theme directory
9. Impossible to call wordpress function inside an include?
10. Can I have an additional functions.php file in WordPress?
11. wp_star_rating() – Adding a 5 star rating system to theme
12. Unable to point the child theme directory even using get_stylesheet_directory()
13. Can I include a custom PHP function in a WordPress function?
14. file.php not loaded?
15. Why should I use get_template_directory() when include files?
16. WordPress functions.php conditional include another functions file
17. Including admin-options.php file in Child Themes
18. Undo a function that is not (seemingly) hooked to an action?
19. paginate_links() don’t properly work in search.php?
20. How to influence the information displayed on widget inside wp-admin
21. Remove Container Element From wp_nav_menu() Markup
22. WordPress function like is_category for subcategory? is_subcategory?
23. How can I get $id variable in widget’s form function?
24. Using a private method as an action callback from within a class
25. Auto close (hide) custom metabox / set default state
26. How to activate “Description” metabox for menu item programmatically?
27. Make WordPress size and name images for Retina.js
28. Pinterest Integration Using functions.php
29. Adding WooCommerce to a Custom Theme – not working [closed]
30. WooCommerce add_action hook results in 500 error
31. Advice: Template structure – php blocks in sidebar or someting else?
32. Changing itemprop from logo to image on custom logo?
33. wp_get_post_terms() returns WP_Error in functions.php but in template it works
34. Move jQuery and Migrate to footer?
35. Make menu structure match page heirarchy on page parent change
36. Change Rating range in Link Manager
37. function to erase swear words
38. str_replace function in theme
39. Problem only while using require_once() within functions.php
40. How to force field validation first, then its values saved durning edit profile?
41. Filter out other users comments. Visualize only own comments and editor role users’ comments
42. How to properly remove style for non logged in and front page only
43. WordPress converts media extention URL automatically to video player
44. How do you Permanently Delete Sidebars
45. Allow Contributor to edit their own posts after Adm aproval
46. help I changed one currency in woocommerce and everything is ruined [closed]
47. How to run a function in every page, every device
48. Which function required?
49. How to ignore posts in pre_get_posts?
50. How to retrieve the values of a sub-field in the first and last row of an (ACF) repeater inside function?
51. New functions in separate directory — better, portable way
52. WordPress Migration error phpupdate_option is not a function
53. Custom Query Not Paginating
54. Solved: redirect to another page using functions.php
55. Getting the teaser text without overriding global variables
56. Ajax resetting my global variable
57. Problem enqueuing scripts on not single posts
58. referencing the current user in a page i created in wordpress
59. is_main_query() always returning false
60. How to show ACF value under post/page title in wp-admin
61. Undefined variable issue for wp_get_attachment_image_url
62. Counting posts and trigger it [closed]
63. ACF Flexible in TCPDF
64. How do i tweak my wp Post title base on category of the post
65. Why isn’t comment validation working?
66. modifying every other element’s class inside while loop
67. Adding Custom Body Class for Page: Shop
68. “Conditional query tags do not work before the query is run. Before > then, they always return false. “
69. Change ‘Categories’ to ‘Topics’
70. Is it possible to use ‘wp_insert_post’ function within a for loop?
71. save_post function keeps triggering: Warning: array_map(): Argument #2 should be an array… when restoring from trash
72. More than one search results page template for two searches on site
73. Code I am placing in the wp_footer is going outside the entire HTML frame!
74. Restoring pages in wordpress
75. Redirect after login to current URL
76. Restrict certain roles registrations by domain
77. Replacing term/taxonomy archive pages with search queries
78. Return ACF Field value function
79. Different body image backgrounds on different pages, posts and categories
80. Hide certain post types from editors
81. Language switcher for subdomains
82. Function to draw random image from specified category destroys site logic – why?
83. Issues with add_query_arg() not passing a variable
84. Add Function For Instances of Custom Text in Multiple Category IDs to display in post content
85. Move captions under gallery images in twenty fourteen theme
86. Force changing the Site Title and add link
87. create submenu page – error function not found or invalid function name
88. How to add a class name to the ancestor of a post?
89. Undefined offset: 2
90. is_user_logged_in() isn’t working
91. Retrive post by tags PHP code
92. Sorting date results from a query
93. Using is_plugin_active within functions.php
94. Button generate a random URL [closed]
95. Shortcode to include PHP file, pass various parameters to include?
96. Add custom css to theme
97. How do I add functionality to images?
98. Why don’t ‘wp_nav_menu’ CSS classes work until a menu is created?
99. Load script only on selected Pages
100. Using input_attrs() Multiple Times Within One Customizer Control