是否可以将php.ini设置为使用多个错误日志?

My current php.ini reads: error_log = error_log

And it is fine, it logs the errors of all scripts into separate files, depending on what folder they are in. So it gives a result like this:

public_html/error_log
public_html/folder1/error_log
public_html/folder2/error_log

But is it also possible to, in addition to this, make it log to one general error_log? Like below?

public_html/general_error_log_for_all_folders
public_html/error_log
public_html/folder1/error_log
public_html/folder2/error_log
error_log = /absolute/path/to/error_log

if you want to setup different error logs for some applications, use runtime config, .htaccess for example

php_value error_log = /absolute/path/to/public_html/certain/app/error_log