Manual:$wgDebugLogGroups

Debug/logging: $wgDebugLogGroups
Direct wfDebugLog() output for certain groups to files other than $wgDebugLogFile.
Introduced in version:	1.5.0 (r10598)
Removed in version:	still in use
Allowed values:	array of log group keys to filenames
Default value:	empty array

Other settings: Alphabetical | By Function

Details

Set to an array of log group keys to filenames. If set, wfDebugLog() output for that group will go to that file instead of the regular $wgDebugLogFile. Useful for enabling selective logging in production.

Example

$wgDebugLogGroups = array(
	'ConfirmEditExtension'	=> $IP . '/ext_confirmedit.log',
	'FCKeditor'		=> $IP . '/ext_fckeditor.log',
	'FCKeditorExtension'	=> $IP . '/ext_fckeditor.log',
);

This example logs debug messages of group "ConfirmEditExtension" to "ext_confirmedit.log" and those of groups "FCKeditor" and "FCKeditorExtension" to "ext_fckeditor.log".