A Step-by-Step Guide to Fix Internal Server Error in WordPress

WordPress is a powerful platform that allows you to create and manage your website with ease. However, sometimes you may encounter internal server errors that can cause your site to be unavailable. In this article, we’ll provide you with a step-by-step guide on how to fix internal server errors in WordPress.

Step 1: Identify the Problem

The first step in fixing an internal server error in WordPress is to identify the problem. The error message may not always provide you with the exact cause of the issue. Therefore, you need to check the error log to find out the underlying issue.

To do this, you can access your website’s error log through your hosting control panel or via FTP. Once you have identified the issue, you can proceed with the next steps.

Step 2: Increase PHP Memory Limit

One of the most common causes of internal server errors in WordPress is a low PHP memory limit. WordPress requires a minimum of 64 MB of PHP memory to function correctly. If your site is using more memory than what is allocated, it can cause an internal server error.

To increase the PHP memory limit, you need to add the following code to your wp-config.php file:

define( ‘WP_MEMORY_LIMIT’, ‘256M’ );

This code will increase your PHP memory limit to 256 MB. You can increase or decrease this value based on your website’s requirements.

Step 3: Disable All Plugins

Plugins are a great way to extend the functionality of WordPress. However, sometimes a plugin can cause an internal server error. To find out if a plugin is causing the issue, you need to disable all plugins and then re-enable them one by one to find the culprit.

To disable all plugins, you can rename the plugins folder in your WordPress directory. This will deactivate all plugins on your site.

Step 4: Switch to the Default Theme

Another common cause of internal server errors in WordPress is a faulty theme. If you have recently installed or updated a theme, it may be causing the issue. To find out if the theme is causing the error, you need to switch to the default WordPress theme.

To switch to the default theme, you can rename your current theme folder in your WordPress directory. This will activate the default theme.

Step 5: Re-upload WordPress Core Files

If none of the above steps work, you can try re-uploading the WordPress core files. Sometimes, a corrupted or missing file can cause an internal server error.

To re-upload the WordPress core files, you need to download the latest version of WordPress from the official website. Then, unzip the files and delete the wp-config.php and wp-content folders. Finally, upload the remaining files to your WordPress directory using FTP.


Internal server errors in WordPress can be frustrating, but they are usually fixable. By following the above steps, you can identify and fix the issue quickly. However, if you are still facing the issue, you should contact your hosting provider for assistance.

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