Issue: Undefined index: pageid

In src/addons/vw/vw/_core/controller/proxy/like/comment/vw.php, find:
Replace with:

Now I get:

ErrorException: [E_NOTICE] Undefined index: displayorder src/addons/vw/vw/_core/controller/ui/discussion/vw.php:1437
Generated by: Raigryn Vayd Feb 26, 2020 at 4:30 PM
Stack trace
#0 src/addons/vw/vw/_core/controller/ui/discussion/vw.php(1437): XF::handlePhpError(8, '[E_NOTICE] Unde...', 's...', 1437, Array)
#1 src/addons/vw/vw/_core/controller/ui/discussion/vw.php(323): vw_UI_Discussion_Controller->reply_permissions()
#2 src/addons/vw/vw/_core/controller/ui/discussion/vw.php(124): vw_UI_Discussion_Controller->postcomment()
#3 src/addons/vw/vw/_core/controller/ui/discussion/xf0.php(61): vw_UI_Discussion_Controller->execute()
#4 src/addons/vw/vw/_core/controller/ui/discussion/xf2.php(28): vw_UI_Discussion_Controller_XF0->execute()
#5 src/addons/vw/vw/_core/controller/ui/page/vw.php(889): vw_UI_Discussion_Controller_XF2->execute()
#6 src/addons/vw/vw/_core/controller/ui/page/vw.php(841): vw_UI_Page_Controller->do_comments(true)
#7 src/addons/vw/vw/_core/controller/ui/page/vw.php(215): vw_UI_Page_Controller->comments()
#8 src/addons/vw/vw/_core/controller/ui/stack/vw.php(294): vw_UI_Page_Controller->execute()
#9 src/addons/vw/vw/Pub/Controller/Wiki/Wiki.php(80): vw_UI_Stack_Controller->execute()
#10 src/addons/vw/vw/Mvc/Dispatcher.php(30): vw\vw\Pub\Controller\Wiki\Wiki->_actionIndex(Object(XF\Mvc\ParameterBag))
#11 src/addons/vw/vw/Pub/Controller/Wiki/AbstractController.php(26): vw\vw\Mvc\Dispatcher::dispatch(Object(vw\vw\Pub\Controlle r\Wiki\Wiki), 'index', Object(XF\Mvc\ParameterBag))
#12 src/XF/Mvc/Dispatcher.php(350): vw\vw\Pub\Controller\Wiki\AbstractController->actionIndex(Object(XF\Mvc\ParameterBag))
#13 src/XF/Mvc/Dispatcher.php(257): XF\Mvc\Dispatcher->dispatchClass('\\vw\\vw\\Pub\\Cont...', 'Index', Object(XF\Mvc\RouteMatch), Object(vw\vw\Pub\Controller\Wiki\Wiki), NULL)
#14 src/XF/Mvc/Dispatcher.php(113): XF\Mvc\Dispatcher->dispatchFromMatch(Object(XF\Mvc\RouteMatch), Object(vw\vw\Pub\Controller\Wiki\Wiki), NULL)
#15 src/XF/Mvc/Dispatcher.php(55): XF\Mvc\Dispatcher->dispatchLoop(Object(XF\Mvc\RouteMatch))
#16 src/XF/App.php(2184): XF\Mvc\Dispatcher->run()
#17 src/XF.php(391): XF\App->run()
#18 index.php(20): XF::runApp('XF\\Pub\\App')
#19 {main}
Request state
array(4) {
["url"] => string(34) "/Folklore/Kaska-Sample?do=comments"
["referrer"] => string(58) "https://chroniclesrp.net/Folklore/Kaska-Sample?do=comments"
["_GET"] => array(2) {
["/Folklore/Kaska-Sample"] => string(0) ""
["do"] => string(8) "comments"
}
["_POST"] => array(12) {
["quickreply_html"] => string(11) "<p>Test</p>"
["do"] => string(8) "comments"
["action"] => string(11) "postcomment"
["fromquickreply"] => string(1) "1"
["attachment_hash"] => string(32) "4cb9c863b39901360c32d1b6791b985b"
["attachment_hash_combined"] => string(131) "{"type":"vwcomment","context":{"contentid":1566,"content typeid":1,"areaid":6,"userid":8},"hash":"4cb9c863b3990136 0c32d1b6791b985b"}"
["last_date"] => string(1) "0"
["last_known_date"] => string(10) "1582734613"
["_xfToken"] => string(8) "********"
["_xfRequestUri"] => string(34) "/Folklore/Kaska-Sample?do=comments"
["_xfWithData"] => string(1) "1"
["_xfResponseType"] => string(4) "json"
}
}

That has been resolved as part of: https://www.vaultwiki.org/issues/5970/
Which is a bundle of undefined index errors (the error messages may be slightly different in PHP 7.4).

Under PHP 7.4, we expect that a lot more of these will be found. It seems like PHP 7.4 is a lot more strict when it comes to missing indexes than previous PHPs were.

Yes I'm on 7.3 for clarity.