AlphaDC
How to Fix a Fatal Error on WordPress
Irwan
Last update: November 29, 2024
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Fatal errors in WordPress can be daunting, especially if they prevent access to your site. However, these issues are often fixable with the right approach. In this guide, we’ll explore the common causes and solutions to resolve fatal errors on your WordPress website.

Understanding a Fatal Error in WordPress

A fatal error occurs when WordPress encounters a problem it cannot process, resulting in a site crash. These errors often display a message like:
“Fatal error: Uncaught Exception…” or similar.

Common Causes of Fatal Errors

  1. Plugin conflicts.
  2. Theme compatibility issues.
  3. Insufficient PHP memory limit.
  4. Corrupt WordPress core files.

Step-by-Step Guide to Fix a Fatal Error

1. Identify the Cause

Check the error message displayed on the screen. It usually provides clues such as the file name or line number causing the problem.

  • Enable Debugging Mode:
    Add the following line to your wp-config.php file:phpCopy codedefine('WP_DEBUG', true); define('WP_DEBUG_LOG', true); The error log file will be saved in wp-content/debug.log.

2. Disable Plugins

Faulty plugins are a common culprit.

  • Access your site files using FTP or your hosting file manager.
  • Navigate to wp-content/plugins.
  • Rename the plugin folder to something like plugins-disabled to deactivate all plugins.
  • Check if the error is resolved.

3. Switch to a Default Theme

If the error persists, it might be theme-related.

  • Navigate to wp-content/themes via FTP.
  • Rename your active theme folder (e.g., theme-old).
  • WordPress will automatically switch to a default theme like Twenty Twenty-Three.

4. Increase the PHP Memory Limit

A low memory limit can cause fatal errors.

  • Open wp-config.php and add:phpCopy codedefine('WP_MEMORY_LIMIT', '256M');
  • Save and refresh your site.

5. Reinstall WordPress Core Files

If none of the above works, reinstall WordPress core files.

  • Download the latest WordPress version from wordpress.org.
  • Replace all files except the wp-content folder and wp-config.php.

Preventing Future Fatal Errors

1. Regular Updates

Keep WordPress, themes, and plugins up-to-date to avoid compatibility issues.

2. Use Reliable Plugins and Themes

Only install plugins and themes from reputable sources.

3. Monitor Server Performance

Ensure your hosting provider meets WordPress requirements, such as PHP version and memory limits.

Need Help Fixing WordPress Errors?

If this guide seems too technical or overwhelming, I can help! I specialize in fixing WordPress errors, including fatal errors, quickly and efficiently. Contact me today to get your site back up and running without hassle!