White screen in WordPress – causes and methods of problem analysis

The White Screen of Death (WSOD) is one of the most frustrating problems that WordPress users can face. It manifests itself in the absence of any content on the website – the user only sees a white screen. Below we discuss the most common causes of this problem and effective methods to fix it.

What is a white screen in WordPress?

The White Screen of Death is when the browser does not display any content on the page. This can be the whole site or parts of it, such as the admin panel. The problem is usually due to code errors, plugin or theme issues, as well as server limits.

The most common causes of a white screen in WordPress

1. PHP code errors

Improperly written PHP code in a theme, plugin, or custom functions can lead to fatal errors that result in a white screen.

2. Plugin conflicts

Installing a new plugin or updating an existing one can cause conflicts with other plugins or the theme, leading to crashes.

3. Theme issues

An incompatible or corrupted WordPress theme can generate errors that result in a white screen. Often, the problem arises after updating the theme.

4. PHP Memory Limit

WordPress and its components require a certain amount of server memory. If the PHP memory limit is exceeded, the site may stop working.

5. Server Issues

Server configuration errors or temporary failures can lead to content not being displayed on the page.

How do I fix a white screen problem in WordPress?

1. Check the plugins

• Disable all plugins: Log in to the server using FTP and rename the /wp-content/plugins folder to a different one, e.g. /wp-content/plugins-deactivated.
• Activate plugins one at a time: Restore subsequent plugins to identify which one is causing the problem.

2. Change the theme

• Switch to the default theme: If you have access to the admin panel, change the theme to one of the default ones, such as Twenty Twenty-Three. If you don’t have access, do this via FTP by renaming the folder of the current theme.

3. Increase PHP Memory Limit

• Edit the wp-config.php file: Add the following code in the wp-config.php:
  define('WP_MEMORY_LIMIT', '256M');
  use the parameter change in the .htaccess file.

4. Enable debugging

• Activate Debug Mode: Add the following code in the wp-config.php file:
  define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);
  When you enable debugging, errors will be written to the /wp-content/debug.log.

5. Check Server Logs

Review the server logs to find details about the issue. The logs are usually available in the hosting management panel.

6. Restore Backup

If the above methods don’t work, restore your website from a backup. Make sure your backup is up-to-date and reliable.

How to prevent a white screen?

• Update WordPress and its components: Regular updates reduce the risk of errors.
• Test changes on the test page: Before you roll out new plugins or updates on the production site, test them on a test copy.
• Use plugins and themes from trusted developers: Always check reviews and ratings before installing new add-ons.
• Back Up Regularly: Backups will make it easier to restore your site in case of problems.

Summary

White screen in WordPress is a common problem, but with the tips above, it can be effectively resolved. It is crucial to understand the potential causes and implement appropriate corrective actions. Regular updates, tests and backups are essential preventive measures that help avoid this type of failure.