Manual:$wgDebugComments

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Debug/logging: $wgDebugComments
Include portions of log output in page HTML comment
Introduced in version: pre 1.1.0
Removed in version: still in use
Allowed values: boolean
Default value: false
Other settings: Alphabetical | By function

Details[edit]

If on, some debug items may appear in comments in the HTML output. As of MediaWiki-1.8.2, function outputPage() writes one HTML comment near the beginning of the page body with the template:

<!-- Wiki debugging output: ... comment debug text ... -->

Debug text passed to function wfDebug() is included in the text of this debug comment unless an optional second parameter (named logonly) is passed to wfDebug() which evaluates as true.

Use on production sites is not recommended. Debug comments reveal information in page views which could potentially expose security risks.

See also[edit]