Warning: Cannot modify header information

Well, the error says exactly what’s going on.

You’re outputting content, before the data is finished being manipulated. It’s like you’re trying to echo something but WordPress still has to do some stuff and it’s telling you “No, no, let me do my thing first”. You’re calling the echo too early.

In short, you’re 99% outputting before wp_head.

So, go to header.php and after the body div, put your

WPCFSSearchForm::show_form($preset,"preset-$id");

Or

require_once preset-display.php

Should work.

Thing is, this is really bad to do, so I suggest hooking show_form to an action and outputting it anywhere you want.

Related Posts:

  1. Illegal string offset Warning PHP
  2. Error Warning: Declaration of description_walker::start_el after PHP upgrade [duplicate]
  3. “Warning: count()” error on php 7.2
  4. PHP contact form returns warning in text widget [closed]
  5. Warning: array_pop() expects parameter 1 to be array, boolean given
  6. Get rid of this Strict Standards warning [closed]
  7. Illegal string offset in PHP function
  8. Warning message (re. php) on the blog page
  9. How to fix this warning:call_user_func_array() expects exactly 2 parameters, 1 given in D:\wamp\www\…….\wp-includes\class-wp-hook.php on line 286
  10. Error while setting role
  11. How to fix this PHP warning in WP-Admin after upgrading to 3.1.2?
  12. I am receiving a pluggable.php warning sign on my only http:// page
  13. class ‘wphpc_PAnD’ not found
  14. PHP Warning: Missing argument 2
  15. Cannot modify header information – server cache
  16. PHP warning – Use of undefined constant ‘FORCE_SSL_LOGIN’ ‘FORCE_SSL_ADMIN’ on wp-config.php
  17. PHP warning with code for nav menu walker [duplicate]
  18. Warning: preg_replace(): Compilation failed: unknown option bit(s) set at offset -1
  19. Warning: Illegal string offset ‘post’ and ‘page’
  20. Trying to add taxonomy terms to search results page
  21. PHP Warning: Undefined array key “HTTP_REFERER”
  22. Warning: Array to string conversion in /css/base.php on line 500 [closed]
  23. Issue with fetching mysql data and displaying results via shortcode in webpage
  24. wp_insert_post() with HTML tags using PHP
  25. How to rename woocommerce-billing-fields
  26. Any ideas why I am getting “I’m getting “wp-admin/admin-ajax.php 401 (Unauthorized)”
  27. InnerBlocks with allowedBlocks not working with acf_register_block
  28. Can a plugin redirect product page based on IF condition?
  29. Cant register rest routs from class instance
  30. Hierarchical taxonomy list with modificated term links
  31. How can i change variable if condition is not met
  32. Shortcode not staying inside div tag
  33. if isset not working for undefined index, how to fix
  34. HTML showing after PHP code in tag
  35. What’s a good way to allow overwriting files within a child theme if I want the same folder structure?
  36. Decoded malware code [closed]
  37. Double Curly Brackets in Php
  38. Line breaks inside shortcode variable
  39. How to return site_url() without https://
  40. WordPress filter load_textdomain_mofile not working inside a child theme’s functions.php but works form inside a plugin
  41. How set a custom URL for a new theme file in WP?
  42. PHP-warning in post-template.php and no loading content on pages
  43. How to unlink all posts from tracking same amount of views
  44. Connecting to another server database from the wordpress plugin
  45. Site Health says I’m running an older version of PHP even after I upgraded to 7.4.4
  46. Login redirect. Check user meta and redirect accordingly
  47. PHP Notice: Undefined offset: -1 – Navigation Previous/Next
  48. WordPress REST API register_rest_route give a 500 error
  49. How to use wordpress function wp_enqueue_script() in php?
  50. Where to insert redirect code based on http_referer?
  51. Add class to website based on post taxonomy
  52. Form Submission Not Working In Custom Theme
  53. Need php code’s output to display underneath a Divi Module
  54. Where is the PHP code generating an element?
  55. How do I check or test a WordPress Auto Year Change Script?
  56. Parse error: syntax error, unexpected ‘,’
  57. Prevent redirect to wp-login.php
  58. Extending WP_Customize_Media_Control to return filename
  59. Insert page content into another page with a changed variable
  60. Decimal values via get_option() with custom local (decimal point = comma)
  61. WP_Query | IF within $args array | Help me only add specific arguments if the argument is not blank
  62. Noindex Posts From Certain Authors In WordPress
  63. In WordPress, how do I get the number of posts next to single_cat_title(”); in the category.php file?
  64. Use get() method to grab all categories and output inside another method
  65. Seo Friendly Filter URLs
  66. Include only posts with meta key “add_in_rss” in RSS Feed
  67. Pass Variables or Variable Place-Holder from Editor to PHP
  68. Convert a string into a decimal number for use in query
  69. Is there a built-in function to generate multiple paragraph tags based on a string with new line separators?
  70. Issue with custom loop in Archive page
  71. Use custom template on custom post type
  72. How to display SQL query that ran in WC_Order_Query?
  73. Site downloads files instead of loading them
  74. get_the_ID() doesnt work
  75. How to get specific attribute from DB
  76. Saving data from custom form in wordpress database
  77. PHP contact form not redirecting [closed]
  78. WooCommerce pages looks unstyled
  79. customize woocommerce templates and display store on home
  80. Add value to new attribute inside WordPress menu items
  81. Do I always need to call wp_get_current_user() before accessing $current_user?
  82. Please show me how to use an if/else statement in combination with wp_enqueue
  83. How to make function appear in sentence?
  84. Accessing values from ACF sub field (flexible content area) in PHP
  85. Save html content of a widget textarea
  86. Creating an image from a custom field
  87. Widgets not showing on custom theme
  88. How to disable delivery on certain date at checkout page in WooCommerce?
  89. How to add no follow to specific links?
  90. Loop over Array and get the distinct ids
  91. WordPress transient not working with WP Engine
  92. How to define a variable already defined in a plugin function?
  93. Basic wpdb update question
  94. Plugin development and composer
  95. WC_Customer delete function returns error
  96. Only show size attributes in product box woocommerce when available
  97. Array to string conversion on array_map
  98. Store metakey value as an array
  99. Increment paged on WP_Query
  100. Target post_date_gmt if it’s empty or not set
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)