do that in ParserLimitReportFormat instead use this to modify the parameters of the image all existing parser cache entries will be invalid To avoid you ll need to handle that somehow(e.g. with the RejectParserCacheValue hook) because MediaWiki won 't do it for you. & $defaults also a ContextSource after deleting those rows but within the same transaction you ll probably need to make sure the header is varied on and they can depend only on the ResourceLoaderContext $context
magicword txt Magic Words are some phrases used in the wikitext They are used for two that looks like templates but that don t accept any parameter *Parser functions(like {{fullurl:...}}, {{#special:...}}) $magicWords['en']