To send HTTP headers just do it early enough. On the action wp_loaded for example. Don’t forget to call exit; when you are done, so WordPress doesn’t send its own headers later.
Related Posts:
- How do I force wp_enqueue_scripts to load at the END of ?
- How do I make my plugin load before the headers are output so I can redirect wordpress?
- Add code into on a per page/post basis
- How to remove/hide action links cluttering under specific plugins’ names
- Trying to avoid including wp-load.php
- Change My Basket text in the header of WooCommerce Artificer theme
- How to send “Location” header on plugin form submit event?
- Meteor Slides as header only for homepage and Use featured image of each page as header for respective pages
- do_action and hook methods
- Strip HTML comments from plugins in header/footer
- send_headers don’t work on wordpress multisite
- adding meta data using plugin to top of head
- Open Post Thumbnail in New Child Theme File in WordPress
- WordPress Redirect Not Working – AJAX Callback Response Not Picked Up
- Issue using wp-load.php in WordPress Plugin Development
- Headers already sent when I try to add headers via a shortcode
- Use wordpress functions in another PHP file
- WordPress repository forbids me call wp-load.php in non-WordPress file
- Show an image in my header.php
- Headers Content-Security-Policy CSP Major Issue
- How to debug error message: Cannot modify header information
- Object method calling for global $wpdb in header.php
- Using wpdb without loading all plug-ins via wp-load.php
- What does making sure “that your theme is WordPress header and footer tag enabled” mean?
- Know which plugin is calling JS in wp_head()?
- My single.php page does not show the related data to the post which is clicked
- Enqueue stylesheet in plugin for wp-login.php
- wp-load.php redeclares classes
- Get ‘Headers already sent’ error for the plugin I am creating when I try to login
- Custom Login Page — wp_signon Headers Already Sent?
- Adding Plugin Assets to Header
- Content-Security-Policy Headers are there and showing the correct settings, but still getting a refused connection
- echo get_option in header template
- Cannot access WP admin because plugin returns 204
- PHP mobile redirect Endless loop
- force jQuery to load in the head
- Edit page header on a custom plugin
- How do i ‘deactivate’ a plugin only on a certain page template?
- how would I include some html in the header section of a wordpress plugin? I get an error
- How do I fill the Home Description?
- Hook for plugin to insert into entry-meta
- sliding/fading header plugin or approach suggestion
- How to make a slider hearder?
- Hook from plugin doesn’t fire up from external PHP script
- Prevent WordPress from sending set-cookie http header
- I created a plugin with ‘view page’ that uses MYSQL + PHP. When I use wp_insert_post(), it turns everything to HTML
- how to define a html folder to make it work with WordPress commands
- Getting Fatal error: Uncaught Error: Call to undefined function plugin_dir_path() when linking to another file within my wordpress plugin
- How to change the width of certain paragraph or header blocks?
- Modifying server’s response to API endpoint
- How to fix shifting header after installing speed / cache plugins?
- Cannot modify header information – headers already sent during plugin activation
- Debug in WP backend
- How to overlay a webcomic plugin on top of a header image?
- Set Content-Type header in do_parse_request filter
- Primary Menu doesn’t show because of w3 cache
- Insert Plugin on a custom page
- Retrieve data from multiple WordPress sites using PHP script
- Problems with installing and deleting plugins
- Change text “My Basket” in woocommerce artificer theme
- Get Core Functionality from Within a (Secondary) Plugin File
- How to laod wp_enqueue_style to another header i created my self
- Cannot modify header information – headers already sent by
- Footer option is missing in Customiser
- No Google Analytics code rendered in the header?
- all plug-ins load scripts on all pages
- Location dependent rendering of locations? [closed]
- Creating a widget and missing jQuery
- SMTP Error: Could not authenticate [closed]
- How to add support for caching plugins for my own plugin?
- My custom php file keeps 404’ing in WordPress when I call it. What am I missing?
- Use $variable from file1.php in file2.php (different file paths)
- How to import WordPress site to new WordPress site?
- How can I automatically download all images from all imported posts, place them on my new host, and replace all the links
- Need to replace Currency Shortforms
- Looking for a free quiz plugin which saves the candidates answers for review [closed]
- wp_enqueue_scripts
- Why Does The `auto_update_plugin` Hook Disable Management?
- Return multiple values in a shortcode attribute
- Allowing .rfa Files In Media Upload [duplicate]
- Sanitizing file & directory form input
- What’s my optimal choice for remote access to my localhost sites?
- Some WordPress Posts are automatically becoming comments on other Posts
- List category posts displaying limited posts
- Get Every Key & Value from Array then Display All in New Line
- What are admin hooks
- disabling ftp on wordpress
- Woocommerce Coupon Menu and Marketing Menu missing After “Coupons can now be managed from Marketing > Coupons.” [closed]
- Is there a way to add custom endpoint to specific page only
- “uagb/section and uagb/columns block”
- IF condition based on wp_remote_get output
- shortcode not return any thing in Gutnburg
- Fatal error on some pages after cancelling WPSTAGING cloning process
- Always get creating a new table with foreign key
- Progmatically adding menu links to the default (Top) or Footer menu
- Add text to variable
- Where is my google maps on my page? [closed]
- standard custom page template hierarchy for plugins
- get specific value of a array | PHP
- How do I add $_SESSION[”] to my wordpress page?