63     private $sortKey;  variable in helper_plugin_pagelist
109         $this->sortKey = $this->getConf('sortby'); //string
110         if($this->sortKey) {
299                 $this->sortKey = substr($flag, 7);
322         if ($this->sortKey === '' && $this->sort) {
323             $this->sortKey = $this->defaultSortKey;
465         $sortKey = $this->getSortKey($id);
466         if (!blank($sortKey)) {
468             $sortKey = $this->uniqueKey($sortKey, $this->pages);
469             $this->pages[$sortKey] = $this->page;
940         $sortKey = '';
941         if ($this->sortKey !== '') {
942             $sortKey = $this->page[$this->sortKey] ?? false;
943             if ($sortKey === false) {
945                 if ($this->sortKey == "draft") {
949                 if ($this->sortKey == "pagename") {
952                 if ($this->sortKey == "ns") {
963                 if ($this->sortKey == "date") {
966                 if ($this->sortKey == "desc") {
969                 if ($this->sortKey == "summary") {
972                 if ($this->sortKey == "user") {
977                         if ($this->sortKey == $col) {
984 …$sortKey = $this->page[$this->sortKey] ?? 9999999999999999; //TODO mostly used for non-existing pa…
987         return $sortKey;