How to enable display of error details in PHP

When developing PHP programs, you may sometimes encounter errors. Errors are generally divided into two types: grammatical errors and logical errors. When an error is encountered, PHP automatically saves the error information in a log file. However, developers often need to view detailed error messages when debugging. In this article, I will show you how to turn on error details display in PHP.

1. Modify the PHP configuration file

The PHP configuration file (php.ini) contains many PHP runtime settings. In order to display PHP error details, three settings in the configuration file need to be modified. Please use your own text editor to open the configuration file (php.ini) and change the following three settings:

a. Open the error report

and change it to:

error_reporting = E_ALL

This setting tells PHP to report all errors and warnings, including E_NOTICE, E_STRICT and E_DEPRECATED level warnings.

b. Display error information

display_errors = On

This setting tells PHP to output error information to the browser for easy viewing and debugging.

c. Record error information

Change to:

log_errors = On

This setting tells PHP to save error information to a log file for later viewing and analysis.

2. Restart Apache Server

After completing the above steps, please restart your Apache server for the changes to take effect.

3. View Error Details

When you access the application, you will see PHP error details if a syntax error or logic error occurs. Error messages provide valuable context that can help you quickly locate the problem and fix it.

During the actual development process, it is recommended to use the above method to enable error detailed information display and logging in the local environment. But in a production environment, it is not recommended to output error details to the browser. At this time, it is recommended to save the error information to the log file and turn off the output of the error information.

Summary

Turning on the display of PHP error details can help developers quickly locate errors and solve problems. Printing error details to the browser can be a great help during debugging, but should be used with caution in a production environment. We recommend that developers choose an appropriate method to record error information so that they can be quickly located and resolved when needed.

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