I am using SphinxSearch 0.9.1 for MediaWiki 1.31 LTS. I am trying to customize the advanced search (searching using namespaces) that is included in my Special:Search page. I have found the following manual for altering the default namespace: Manual:$wgNamespacesToBeSearchedDefault. However, the changes I make on my LocalSettings.php does not seem to be reflecting on the Special:Search page.
Specifically, I have included the following code:
$wgNamespacesToBeSearchedDefault = [NS_HELP => false, ];
in LocalSettings.php to see if it would disable the "Help" namespace from the advanced search, but there was no change to the page.
Is there something I am doing wrong? Please help. I am new to MediaWiki and php in general, hence I understand that I may be missing a big point. Thank you!