How to read php error log

Viewing method: 1. Configure the "php.ini" file; 2. Use the phpinfo() command to view the error log address; 3. Use the "vi /etc/php.ini" command to view the log location; 4. Use "tail -f -50 /var/php_errors.log" to view the log.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

For our PHP developers, on In the production environment, be sure to turn off related debug, display_errors error prompts, etc. Who can’t help but make a mistake? This can prevent non-fatal errors from leaking information such as project paths and databases. So the question is, how do we check PHP and other related errors in production? In fact, you can check it in the error log (error.log or send it directly to syslog).

The following is a brief description of how to configure and view logs.

1. Related configuration

You need to modify the configuration instructions in php.ini as follows:

error_reporting=E_ALL;//将会向PHP报告发生的每个错误   
display_errors=Off;//不显示满足上条 指令所定义规则的所有错误报告   
log_errors=On;//开启错误日志   
log_errors_max_len=1024;//设置每个日志项的最大长度   
error_log=/var/php_errors.log;//指定产生的错误报告写入的日志文件位置

PHP’s configuration file is as above After the settings are completed, restart the web server. In this way, when executing any PHP script file, all error reports generated will not be displayed in the browser, but will be recorded in the error log /usr/local/error.log that you specify. .

In addition, not only can all errors that meet the rules defined in error_reporting be recorded, but also the error_log() function in PHP can be used to send a user-defined error message.

2. Check the storage address

1. Check the error log storage address through php.ini

 echo &#39;<?php phpinfo(); ?>&#39; | php 2>&1 |grep -i error_log

Or output it in a php file phpinfo();View the error log storage location

2. View the log storage location

vi /etc/php.ini

3. View the log:

tail -f -50 /var/php_errors.log

In addition to general error output, PHP also allows s## to the system Send customized messages in #yslog. Although customized messages can also be sent to syslog through the error_log() function introduced earlier, PHP provides 4 dedicated functions for this feature that need to be used together. It will not be introduced here.

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