How to find error logs in php

In PHP development, errors are very common, and in order to facilitate developers to find problems, PHP provides an error logging mechanism. In a production environment, error logging is critical for troubleshooting problems. This article will introduce you to the method of finding error logs in PHP.

1. Error level

First of all, in PHP, errors are divided into multiple levels, including fatal errors, serious errors, warning messages, etc. Depending on the error level, PHP will handle it differently. Developers can set the error level to be recorded by modifying the error_reporting parameter of PHP.ini.

In terms of error level settings, it is generally recommended that developers set error logging to E_ALL, so that all levels of errors can be recorded.

2. Error log file

PHP’s error log is saved in a specified file. By default, the file path of the error log is set to /usr/local/php/var/log/php-fpm.log in PHP.ini, but in actual development, developers can set this path as needed. for other locations.

3. Find errors

When an error occurs in the PHP program, the corresponding error information will be recorded in the error log file specified above. Therefore, when we need to find an error, we only need to open the error log file and search according to the error prompt information.

When looking for errors, you can search the error log file based on the keywords of the error message. After finding the corresponding error message, you can find the code where the error occurred based on the file name and line number in the error message. Location.

Of course, when looking for errors, we can also use some auxiliary tools to help us find errors more conveniently, such as using the grep command.

4. Improve error log

Although error logging is very important in development, in a production environment, due to the large number, it is easy to fill up the disk space. full, thus affecting system performance. Therefore, in order to effectively manage error logs, we can take some improvement measures, as follows:

• Error log file rotation: Error log file rotation can back up or delete older log files for release disk space.
• Clean up useless log information: Some error messages or warning messages may not be very meaningful. We can reduce the amount of recorded information by adjusting the level of error logging and other measures.
• Scheduled cleaning: We can set up regular cleaning of error logs to maintain the stability of disk space and efficient operation of the system.

In short, in the PHP development process, it is very important to master error logging and search methods. Only by correctly using the error log mechanism and improving it can we effectively troubleshoot errors and improve system stability and performance.

The above is the detailed content of How to find error logs in php. For more information, please follow other related articles on the PHP Chinese website!