How to Remove a Website from Google

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There are two methods to fix the “Cannot modify header information – headers have already been sent by” error. The first method does not require you to leave the WordPress dashboard.

However, the second strategy uses FTP/SFTP if you can't access the dashboard or use WordPress.

Let's start with the first troubleshooting method.

1. Fix the Error with the Plugin/Theme Editor or Replace a Plugin
The first thing you should do when you encounter the error “Cannot modify header information – headers have already been sent by” is to open the file that is causing the problem. Then, locate the line that indicates the message.

For example, if you see an error that says the following, it means you need to look inside your theme's functions.php file:


In this case, you can get to the root of the problem by using the WordPress theme editor . To access it, go to Appearance > Theme Editor .

Once inside, use the menu on the right to select the file you malaysia whatsapp number data need to access.


If you look closely, you'll see that there are several whitespace characters before the tag <?php. The error message itself points to line number one. So this tells you that the whitespace characters are the source of the problem.

In this example, all you have to do is remove the blank spaces and click Update File . Now try reloading your website, and the error should go away.

You can apply the same process using the WordPress plugin editor ( Plugins > Plugin Editor ). This method is applicable if the error message points to a faulty plugin file.

Alternatively, you may encounter an error indicating one of the files within your WordPress plugins directory is missing. In this case, you can delete and reinstall that plugin. In most cases, this will fix the problem.

However, please note that you may lose the settings for that plugin, depending on the tool you use. Therefore, you may need to reconfigure the plugin.

2. Edit the Problem File Using FTP/SFTP
In some cases, the source of the “Cannot modify header information – headers have already been sent by” error is not in a file that you can access through WordPress theme or plugin editors. It’s also possible that you’re using a non-WordPress site.