What is an Error Log?
An error log is a server-generated file that records application errors, warnings, and diagnostic messages, providing a critical resource for troubleshooting problems with websites and web applications.
How Does Error Log Work?
Web servers like Apache and Nginx maintain error logs that capture details about failed requests, PHP errors, permission issues, missing files, and other problems that occur during server operation. Each log entry typically includes a timestamp, error severity level, the specific error message, and the file or URL that triggered the error. These logs are essential for diagnosing why a website is malfunctioning.
Regularly reviewing error logs is an important part of website maintenance because errors can degrade performance, break functionality, or expose security vulnerabilities. Most hosting control panels provide access to error logs through a file manager or a dedicated log viewer. Developers often configure custom error logging within their applications to capture additional diagnostic information beyond what the web server records.