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How To Fix Cannot Modify Header Information In WordPress

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How To Fix Cannot Modify Header Information In WordPress

How To Fix Cannot Modify Header Information In WordPress:

From time to time, the smallest things may cause errors to WordPress (Warning: Cannot modify header information). Headers that are earlier transmitted via WordPress issues are really the most concerned. Because of it, you may not be able to log in from the dashboard of a user. As a result, it impedes the proper management of the site.

The problem is most of the time seen in a vacant page in a mistake log hinting to the headers early sent by error, in the condition that WP_DEBUG is determined “true” (more info down). A path of a file and the exact line are behind this issue. Hence, on the screen, your eye will see such a thing displayed:

Warning: Cannot modify header information – headers already sent by (output started at /some/file.php:12) in /some/file-2.php on line X.

The causes of this issue are numerous. However, whitespaces are the utmost ordinary problems, whether they exist after the ?> or before <?PHP segment of the code.

Step By Step On How To Fix Cannot Modify Header Information In WordPress:

First, Beforehand, you need to reach the error log. Via a File Transfer Protocol (FTP) client such as FileZilla, accessing the error log can be done. All you have to do is to look for the wp-config.php file, then set WP_DEBUG on true.

How To Fix Cannot Modify Header Information In WordPress

Second, head to your login page that is commonly your-site-URL/wp-admin then check the shown error message. 

Below, there is a model:

Warning: Cannot modify header information – headers already sent by (output started at wp-contentthemestheme_nameframeworkmoduleswoocommercewidgetswoocommerce-dropdown-cartwoocommerce-dropdown-cart.php:121) in /wp-includes/pluggable.php on line 922

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The above lines convey a message: Via FTP you should go to this path:

 wp-contentthemestheme_nameframeworkmoduleswoocommercewidgetswoocommerce-dropdown-cart

Then,  in that file, locate the said 121st line of code.

The majority of the issues will be solved the moment, in the specified file, you eliminate the vacant space after or before this line.

Third move: Save the file then employ it to nullify the current one after the modifications have already taken place. Accept a ticket that clarifies the issue and allow our assistance team to help you if you find yourself in unease doing these modifications by yourself. Hence, your FTP credentials should take part in your ticket.