Pluggable.php File Errors in WordPress
Are you looking at the pluggable.php file error on your WordPress site? As we all know, WordPress is a PHP-based Content Management System (CMS) and all of its themes and plugins use PHP as the coding language. Whenever a plugin or theme conflicts, an error occurs, and sometimes it leads to the pluggable.php file error.
Talking about pluggable.php file error, it takes place when you have made an addition of code snippet to the WordPress website, activated a new plugin, or there is an incorrect coding in WP core files. The pluggable.php file error infamously is also termed as WordPress Error: Cannot Modify Header Information – headers already sent.
What is Pluggable.php File Errors in WordPress?
The main reason for the happening a pluggable.php file error is when a new function isn’t able to handle the override of the default WordPress functions. The pluggable.php is one of the core WordPress files, which means there is something else which is conflicting the natural behavior of this file. Never edit the core WordPress file as your first option, even when there is an error pointing to them.
Where is Pluggable.php File Errors in WordPress?
Most of the time it is like the white screen of death in wordpress, pluggable.php file error is invisible on the website. This means that whenever you try to open any page of the website, you are only see a blank white page.
In order to encounter it with a warning message, you must simply enable the wordpress debugging. Edit the wp-config.php file and change the following values from “false” to “true”.
define( 'WP_DEBUG', true );
Fixing Pluggable.php File Errors in WordPress?
Most of the time, the error consists of a path from which it generates. So, you have to understand how the error looks like and what it reflects. Here are some the examples:
Warning: Cannot modify header information – headers already sent by (output started at /home/domain/wp-content/themes/themename/functions.php:1171) in /home/domain/wp-includes/pluggable.php on line 1240
Try to look closely, there is another path which consists of the functions.php file of your WordPress theme. If you added any custom code snippet, you should check it again.
Warning: Cannot modify header information – headers already sent by (output started at /home/domain/index.php:19) in /home/domain/wp-includes/pluggable.php on line 16
If you look closely, there is another path which consists of the index.php file of your WordPress. If you added any custom code, you should check it again.
Warning: Cannot modify header information – headers already sent by (output started at /home/domain/wp-config.php:41) in /home/domain/wp-includes/pluggable.php on line 80
Again look closely, there is another path which consists of the wp-config.php file of your WordPress. If you added any custom code, you should check it again.
Warning: Cannot modify header information – headers already sent by (output started at /home/domain/wp-content/plugins/some-plugin-name/some-plugin.php:144) in /home/domain/wp-includes/pluggable.php on line 1090
This error message is pointing to a plugin on your WordPress site causing the error. You can simply deactivate the plugin.
Conclusion
Solving pluggable.php file error wordpress is very easy if you can make out the reason behind it. As it is already mentioned in the blog, to find the file which generates the error, you need to be familiar with the path.
Forget about the path which points you out to the pluggable.php file because you shouldn’t edit it. WordPress core files work fine, it’s a plugin or theme which conflicts with the core.
