WordPress error logs are one of the most important tools for diagnosing and resolving problems on any WordPress site. When a website starts loading slowly, shows errors or stops working entirely, the error log entries provide valuable information about the cause. In this article we look at what WordPress error logs are, why they matter, and how to enable WordPress Debug Mode step by step in order to access the debug.log file and analyse the problems that have occurred.
What Are WordPress Error Logs?
An error log is a text file in which all errors, warnings and notices generated by WordPress, its themes, plugins or the server environment (such as PHP) are recorded. This file acts as a kind of journal of the technical problems that occur on your site. Each entry contains: the date and time, the type of error (Warning, Notice, Fatal error) and the file and line of code where it occurred.
Why Are WordPress Error Logs Important?
Error logs are a fundamental tool for technical diagnosis. Rather than relying on guesswork or deactivating plugins one by one without a clear reason, the error log file provides specific data about what is not working correctly. They help identify: whether the problem is related to a specific plugin; whether there is an incompatibility between a theme and the PHP version; whether a file or resource is missing; whether a function is causing a fatal error. Without debug mode enabled and access to the error log, troubleshooting can be significantly more difficult and time-consuming.
Common Problems That Can Be Diagnosed
- Improper plugin behaviour;
- Site crash;
- White Screen of Death;
- PHP errors;
- Memory limit exhaustion;
- File upload errors;
- Theme and plugin update errors;
- Version compatibility issues.
How to Enable WordPress Debug Mode
To access error logs, you need to enable debug mode. This allows WordPress to write errors to a debug.log file. There are two main methods for enabling debug mode: via a plugin or by editing the wp-config.php file.
Enabling WordPress Debug Mode via a Plugin
This method is suitable for beginners who do not want to edit files manually.
Step 1: Log In to WordPress Admin
Access /wp-admin and enter your credentials.
Step 2: Install the WP Debugging Plugin
In the menu, go to Plugins → Add New, search for "WP Debugging", then click Install Now and Activate.
Note: If you are installing the plugin on a live site, we recommend enabling the option "Set WP_DEBUG_DISPLAY to false, default is true".
Step 3: Debug Mode Activates Automatically
After activating the plugin, WordPress debug mode is enabled automatically. The plugin adds the necessary directives to the wp-config.php file without requiring manual editing. Important: Once you have finished diagnosing, deactivate the plugin to avoid unnecessary logging.
Enabling WordPress Debug Mode via Code
Step 1: Connect to Your Hosting Account
You can use File Manager in cPanel or an FTP client such as FileZilla.
Step 2: Find the wp-config.php File
The file is located in the root directory of your WordPress installation (public_html or the corresponding folder for your domain).
Step 3: Edit the File
Open wp-config.php and find the line:
define( 'WP_DEBUG', false );Replace it with:
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );Save the changes. This will enable debug mode and start recording errors in a debug.log file.
How to Find and Access WordPress Error Logs
After enabling debug mode, WordPress begins recording errors in the debug.log file. Steps to access it: trigger the problem again to generate a log entry; connect to the site via FTP; enter your FTP credentials; navigate to the /wp-content/ directory; find the debug.log file; download it locally and open it with a text editor. Important: If the file does not exist, make sure debug mode is active and that you have reproduced the error.
How to Analyse WordPress Error Logs
The debug.log file serves as the primary reference for diagnosis. Each entry contains a date, time and error description. Example entry:
[12-Jan-2026 14:32:10 UTC] PHP Fatal error: Uncaught Error...How to read the messages: the timestamp shows when the error occurred; the error type (Warning, Notice, Fatal error) indicates its severity; and the file and line number indicates exactly where in the code the problem is located. Understanding these elements is key to accurate diagnosis.
Common error examples: PHP Fatal error — stops script execution; Allowed memory size exhausted — PHP memory limit reached; Undefined function — missing function; Cannot redeclare function — duplicated function.
Important: Never edit the debug.log file directly to "fix" the problem. This file is for diagnostic purposes only.
How to Disable WordPress Debug Mode
Once the problem has been resolved, debug mode must be turned off. Leaving it active can generate a large log file, reduce performance and expose sensitive information.
IMPORTANT! Please do not skip this step. Your site will be at risk if you do not disable debug mode.
If you used a plugin: Log in to WordPress admin, open Plugins, find WP Debugging and click Deactivate.
If you used code: Open wp-config.php and change to:
define( 'WP_DEBUG', false );
define( 'WP_DEBUG_LOG', false );Save the file.
Professional WordPress Support From Jump.BG
If your site continues to show errors or load slowly, professional support can prevent further risks. The Jump.BG team offers specialist WordPress support, including error diagnosis, performance optimisation, plugin conflict resolution, crashed site recovery and security improvements.
Conclusion
WordPress error logs are a tool for identifying technical problems on a WordPress site. By enabling Debug Mode you gain access to specific information about errors, enabling fast and accurate diagnosis. Correct use of debug mode, analysis of the debug.log file and timely disabling of debug mode guarantee a more stable, secure and reliable website.
If you have questions or need assistance, contact us at support@jump.bg or via the chat on our site.
