Exception encountered, of type "Error"
[ff862eac6ec6e21400d52b89] /class-wiki/index.php/Signals_and_systems Error from line 197 of /var/www/class-wiki/includes/MagicWordArray.php: Call to undefined function each()
Backtrace:
#0 /var/www/class-wiki/includes/MagicWordArray.php(231): MagicWordArray->parseMatch()
#1 /var/www/class-wiki/includes/parser/Parser.php(5587): MagicWordArray->matchVariableStartToEnd()
#2 /var/www/class-wiki/includes/parser/Parser.php(2287): Parser->makeImage()
#3 /var/www/class-wiki/includes/parser/Parser.php(2039): Parser->replaceInternalLinks2()
#4 /var/www/class-wiki/includes/parser/Parser.php(1271): Parser->replaceInternalLinks()
#5 /var/www/class-wiki/includes/parser/Parser.php(446): Parser->internalParse()
#6 /var/www/class-wiki/includes/content/WikitextContent.php(331): Parser->parse()
#7 /var/www/class-wiki/includes/content/AbstractContent.php(497): WikitextContent->fillParserOutput()
#8 /var/www/class-wiki/includes/poolcounter/PoolWorkArticleView.php(139): AbstractContent->getParserOutput()
#9 /var/www/class-wiki/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#10 /var/www/class-wiki/includes/page/Article.php(666): PoolCounterWork->execute()
#11 /var/www/class-wiki/includes/actions/ViewAction.php(44): Article->view()
#12 /var/www/class-wiki/includes/MediaWiki.php(503): ViewAction->show()
#13 /var/www/class-wiki/includes/MediaWiki.php(288): MediaWiki->performAction()
#14 /var/www/class-wiki/includes/MediaWiki.php(745): MediaWiki->performRequest()
#15 /var/www/class-wiki/includes/MediaWiki.php(519): MediaWiki->main()
#16 /var/www/class-wiki/index.php(43): MediaWiki->run()
#17 {main}