Teach you how to enable PHP's error_log log

In PHP programming, for some PHP pages that do not have obvious error prompts when accessed, you can use error_log to make further judgments. However, for various reasons, some servers do not enable PHP's error_log function.

You can open it for testing or other needs. The method is as follows.

Edit php.ini and set log_errors to on:

Then, just restart apache.

If it is successfully opened, you can track the corresponding error message:

[Mon Sep 24 16:57:01 2012] [error] [client 218.5.80.210] PHP Warning: fsockopen() has been disabled for security reasons in /home/bccgi-bin/fsockopen.php on line 2

[Mon Sep 24 16:57:02 2012] [error] [client 218.5.80.210] PHP Warning: fsockopen() has been disabled for security reasons in /home/bccgi-bin/fsockopen.php on line 2

[Mon Sep 24 16:57:03 2012] [error] [client 218.5.80.210] PHP Warning: fsockopen() has been disabled for security reasons in /home/bccgi-bin/fsockopen.php on line 2

[Mon Sep 24 16:57:04 2012] [error] [client 218.5.80.210] PHP Warning: fsockopen() has been disabled for security reasons in /home/bccgi-bin/fsockopen.php on line

In addition, note that in the Windows environment, in addition to setting log_errors to on, you also need to define the path and file name of error_log:

(This directory needs to be granted modification permissions to the php identity user, otherwise the log file cannot be generated) IIS does not have the concept of error_log, so it needs to be defined separately.

Whether it is PHP programming or system-based operation and maintenance, log files are very important. Develop the habit of collecting and analyzing logs. Sometimes it will be of great help in solving problems.