source link Want to remove the “Cannot modify the warning header information” error from your WordPress website?
see url This is a common WordPress error, and it is one of the few WordPress errors that provide details that can be used to remove it from your site.
follow url In this article, we will show you how to read an error Read on to find out what caused it and then the steps you need to take to remove it from your WordPress website.
https://reggaeportugal.com/obcuoc03v Let’s dive into the tutorial.
“Warning Cannot modify header information – headers already sent” causes an error
https://kanchisilksarees.com/bm63g9p The error is caused by faulty code in your page header. It is triggered by reasons like:
- In one of your site’s PHP files “ Including whitespace before or after the php” tag
- to be a
print,echoa statement or an HTML block added before the PHP header function - minor issues such as typos, incorrect software configuration, and header misplacement, among other things
https://etxflooring.com/2025/04/0mcw5bvv6iq You are likely to come across this when installing or updating certain software on your WordPress website.
How to fix the “Cannot modify the warning header information” error in WordPress
https://faroutpodcast.com/rxncverrk To fix the “Cannot modify the warning header information” error, you must first find out the exact cause of the error and then proceed to fix the corrupted file.
https://audiopronews.com/headlines/zywqdqku We will show you the exact steps you need to take. let’s get started.
Step 1: Finding the Cause of the Error
go to site You can find out the exact cause of the error by reading the text of the error message. For example, we encountered the following error on our demo site:
https://semichaschaver.com/2025/04/03/z4rp005ec Warning: Cannot modify header information – headers already sent by (output started at /public_html/wp-content/plugins/redirection/redirection-settings.php:3/) in /public_html/wp-includes/pluggable.php on line 33
Tramadol Visa source Important: Before we go any further, please know this go to link the error will look very different on your website. On our demo site, the error was caused by a plugin called Redirect, but on your website, the error could be caused by a different plugin. Or it could be caused by a theme or one of the WordPress core files. Please know that despite the difference in its source, the structure of the error remains the same.
https://faroutpodcast.com/163ol3djemc So in the following paragraphs, we are going to break down the structure of the error and show you how to read it.
How to read error
https://colvetmiranda.org/hxaadxn5a We’re going to break down the error into three parts:
- go Part – 1:warning: header information cannot be modified – headers have already been sent
- Tramadol To Buy Cheap part 2: (output started at /public_html/wp-content/plugins/redirection/redirection-settings.php:3/ )
- enter part 3: in /public_html/wp-includes/pluggable.php on line 33
https://www.anonpr.net/xpcqluqh Part 1 is the name of the error. Part 2 provides details of the file that is causing the error and needs to be fixed. And part 3 indicates a file that is unable to work properly because of a broken file in part 2.
Tramadol Buy Our focus should be on part 2, as it is the source of the error. Let us break it down to further our understanding of it:
- click here public_html/wp-content/plugins These are the folders of your website. You’ll need to access them in the next section to fix the error.
- https://reggaeportugal.com/3qnw1kmbfxg redirection – it is a plugin as it is located in “plugins” folder
- Ultram Tramadol Online redirection-settings.php – This is a file located inside the “Redirection” plugin and a piece of code or too many white spaces inside this file is causing the error
- Buy Clonazepam Overnight Delivery 3 – This indicates which line inside the “redirection-settings.php” file is causing the error
follow url Do you see how the error is showing you the actual reason for it to appear? Next, you will learn how to fix the error.
Step 2: Fixing the Error
https://www.masiesdelpenedes.com/0fxwp96toha There are two ways to fix the “Cannot modify the warning header information” error on your WordPress website. Let’s take a look at each solution.
https://kirkmanandjourdain.com/kozykegi8 Before you proceed, please back up your entire website. In the following tutorial, you will be asked to convert and edit your WordPress files. And these activities are known to break websites. A backup will be your safety net for when things go wrong. So make sure you have a backup before proceeding.
1. Uninstall or replace software (recommended)
https://musicboxcle.com/2025/04/tzcicriws5 In Step 1 we showed you how to find out the cause of the error. So by now, you must have come to know which software is causing the error on your website.
https://reggaeportugal.com/riv2g6clv8e We recommend uninstalling the software and reinstalling it.
https://www.psychiccowgirl.com/kuyshqg If the error persists, download a fresh copy of the software and install it on your website. The previous copy will be automatically replaced with the new one. Just make sure you are installing the same software version.
https://lavozdelascostureras.com/foehfsw6zo If you can’t access your WordPress admin, you’ll need to go to the backend of your website to replace the software.
https://kanchisilksarees.com/f1ryv6fsd The backend of your site can be accessed through your hosting account cPanel or an FTP client like Filezilla. We’ll show you how to use cPanel. If you prefer to use an FTP client, we have a separate FTP guide on that.
Uninstall or replace software using cPanel
go To access cPanel, use your go to site hosting account and choose https://kirkmanandjourdain.com/qizegh5bqrr cPanel, The location of cPanel will be different for each hosting. Check your hosting’s help docs to locate cPanel.
https://www.villageofhudsonfalls.com/4vbc7nm Select in cPanel https://www.annarosamattei.com/?p=8ya5ykouw file manager Located in the Files section.
follow link On the next page, select the http://jannaorganic.co.uk/blog/2025/04/03/3sfy0u89ej public_html folder from the left-hand menu and then go to https://kanchisilksarees.com/3u6mut5q5w9 wp-content,
follow url inside the Buy Soma Online Usa wp-content folder, you will find the folders containing the plugins and themes installed on your site. open a see url plug-in Or https://semichaschaver.com/2025/04/03/b606ubp Subject matter folder, depending on what software you plan to convert.
https://townofosceola.com/u5v0obn4gx Now you have to download a fresh copy of it https://townofosceola.com/jmzdjx9 plugin or theme on your local computer. Premium plugins and themes are purchased from the Market or the official website of the software. free plugins available HereMore free themes can be found Here,
After downloading a fresh copy of the software, make sure https://etxflooring.com/2025/04/t4y1tfzrtob open or remove it,
then go to the go here plugins or themes folder on the file manager and here upload the software in the folder.
At this point, your hosting provider will give you a warning because you are trying to upload a file that already exists. Bypass the warning by selecting the follow link Correct Or https://www.masiesdelpenedes.com/cshjdjm Change button.
To replace WordPress core, you’ll need to take a different set of steps and reinstall WordPress manually.
Once done, visit your website and check if the “Cannot modify the warning header information” error is gone.
Buy Clonazepam 0.5Mg Tablets ImportantStill seeing the error? Sometimes, errors appear even after the site has been served due to caching. Before trying the next solution, make sure you clear your cache and check again.
2. Edit the Corrupted File
Back in Step 1, we showed you how to identify the file that’s causing the error. You can use that information to edit the file and repair it.
For example, on our demo site, we know that the problem originates from a file named “redirection-settings.php” located in the redirection plugin folder. We also know that line number 3 in that file is causing the error.
Similarly, point to the file causing the error on your website and then click Open the file Via file manager or FTP client.
We used a file manager to open the culprit file on our demo site. all we had to do source link right click on the file and choose the more https://aalamsalon.com/bs9jcubgp38 edit button.
One must be technically savvy to locate the error in the WordPress file. So it’s perfectly fine if you can’t find the problem in your culprit file.
Take a screenshot of the file and error, contact the plugin or theme developers, and get help. Leave a comment if any error is caused by the WordPress core file WordPress support forum, Make sure you are not revealing your site name or URL to avoid security risks.
Conclusion
The “Warning Cannot modify header information” is a common WordPress error, and unlike other WordPress errors, it tells us what caused the error to appear on the site.
The solution involves either replacing the culprit software with a newer copy or going to the backend of the site to edit the culprit file. Needless to say, editing WordPress file is risky, and a backup should be taken before taking such steps.
For some other tips on solving WordPress errors, you can also check out our general guide to WordPress troubleshooting.
