My php header() function is not working [closed]

I figured it out. Hours and hours of banging my head against a wall and it turns out all this needed was one simple line:

ob_clean();

Somewhere in some included file there’s probably one line of whitespace that is screwing things up. ob_clean() will work for now. Thanks for the effort everyone who helped!

Related Posts:

  1. Echo URL of large version of Featured Image
  2. Is this a correct usage of ob_start() in my WordPress project?
  3. WP_REST_Response – How to return Gzip answer and add Content-encoding header?
  4. Encode text string being appended as query to URL [closed]
  5. Is it safe to use $_SERVER[‘REQUEST_URI’]?
  6. The correct method to pass query vars in AJAX using ajaxurl
  7. How to check if feed URL was requested?
  8. What is the best practice for escaping data URIs?
  9. urlencoding of the_title() doesn’t work?
  10. How to stop loading multiple copies of jquery
  11. Creating a WordPress form with a PHP script and default header
  12. Why isn’t my if/elseif/else working correctly here?
  13. StudioPress: add meta tag to every page [closed]
  14. Concatenate site_url and string doesn’t work
  15. What’s the proper way to use wp_enqueue_script/style?
  16. Using PHP to toggle stylesheet and header image, set in cookie
  17. Mysterious HTTP 404 header in my own scripts
  18. Continue execution after WP REST API response
  19. Extract subdomain and relative address from a url
  20. Remove query string specific key value
  21. Why does WordPress remove my variables in the URL?
  22. add_image_size for header_image
  23. Responsive Header for Phone
  24. Dynamic content based on a URL parameter
  25. Using WP-API and SSE not authenticating user ID
  26. How to change redirection route to a php page for making it only accessible by logged-in members?
  27. How to use $_GET function WordPress backend
  28. Extend PHP regex to cover “srcset” and “style” attributes
  29. Create custom permalinks to show Custom Post Type’s relationship?
  30. wp-comments-post.php file returns a blank page
  31. Get URL Parameters from referer
  32. Insert custom PHP head above in WP pages
  33. Headers already sent in Pluggable.php / homepage and wp-login error
  34. Is_front_page inside header.php is always returning true
  35. Does wordpress templates always in files or in database?
  36. Adding Meta Tags to a Post using its Tags, Excerpt and content
  37. Moving code from theme header to functions.php
  38. WordPress wp_redirect error
  39. Having Issue on Redirecting With Session in WordPress
  40. Why is $wp->request empty in WordPress 6.0?
  41. Get the URL of the page from which an ajax request has been launched within ajax callback
  42. linking stylesheets and scripts with functions.php
  43. How to pass a PHP $_GET variable and fetch/output it?
  44. Location of core code for database connection and get_header
  45. Clickable image link sends people to wrong URL
  46. Post’s ID pattern?
  47. Custom route and query
  48. How to add a rewrite endpoint to unattached media?
  49. change default RSS feed URL
  50. How do i add slugs to a URL, but still redirecting to the same page
  51. Custom CSV exporter – Cannot modify header information – headers
  52. Nginx WordPress and another Web app URL structure
  53. how to get attached file url for current post?
  54. Call featured image url
  55. Creating customized php files in theme folder
  56. Use an anchor link to open an iframe inside a WordPress page
  57. Comment_author_url doing nothing
  58. Modifying WP URL handing code?
  59. How to deal with a GET variable of ‘name’?
  60. Custom functions for string data calculations
  61. WordPress is removing query variables like page, p from the URL of a custom static page
  62. Workaround for og:image unsupported webp image type, Yoast SEO?
  63. How to define a rule in functions.php that ONLY disables the default wp functionality that undesirably changes ‘&’ to ‘#038;’?
  64. How do you remove header sitewide from mobile only?
  65. Allow two posts (from different categories) to have the same slug
  66. Prepend to all image URLs with PHP, only for mobile devices
  67. Reliable way to add nonce to HTTP Header in WordPress?
  68. how can i redirect dynamic URL in worpress base on ID in htaccess or wp-config or function.php
  69. How to remove get_header From all single pages in wordpress with functions.php without plugin?
  70. Display values of current POST request on page
  71. php code for outputting a custom page in my account
  72. Add Link to PHP message
  73. Current WordPress Page Title as Search Parameter into A Tag
  74. Rewrite rule not working, but only when parameter is text
  75. Changing ALT-tag for logo in wordpress
  76. Get WordPress username to customize url
  77. WordPress/NGINX not respecting the category URL for new posts
  78. How does one make a URL return dynamic JSON with custom Content Type?
  79. Need to forward Data from WooCommerce Webhook sent to same site WordPress REST API custom endpoint
  80. Meta inserted through wp_insert_post gets messed up
  81. Premature end of script headers: wp-mail.php?
  82. setcookie() issues on running with HTTPS on WordPress
  83. Need to Echo A Url path to show on a wordpress page
  84. How to include different html tags in the header for different pages?
  85. I want url from a file in media using title file
  86. changing static link to relative link
  87. Create a dynamic buddupress tab
  88. my site show this symbol (::) between site title and tagline
  89. Removing all my hardcoded URLs with get_site_url()
  90. Passing multiple variables through url (php)
  91. Changing 2011 theme header image based on user dropdown
  92. Warning: Cannot modify header information (with a twist)
  93. Cannot get custom javascript to execute on page
  94. Cannot modify header information – headers already sent
  95. Whats wrong with my code? Need To add String to shortcode? [closed]
  96. Remove /category/ from category (archive) page URLs (without using a plugin)
  97. WPMU – How to echo only one URL
  98. append special url end of my website urls
  99. How to create a WordPress PAGE in another folder?
  100. Create a custom plugin with dynamic child pages listing database records