I noticed the following code in CirrusSearch:
$term = trim( $term );
// No searching for nothing! That takes forever!
if ( !$term ) {
return null;
}In PHP, '0' converts to false. That means that although https://en.wikipedia.org/w/index.php?search=1&title=Special%3ASearch&fulltext=1 returns plenty of results, https://en.wikipedia.org/w/index.php?search=0&title=Special%3ASearch&fulltext=1 returns none.
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Handle '0' search query | mediawiki/extensions/CirrusSearch | master | +1 -1 |
Finding 0 now works. For example:
[0 prefix:mathie](//en.wikipedia.org/wiki/Special:Search/0 prefix:mathie) shows the 68 of the 183 pages in that prefix.
For use in regexp use one of the three escape mechanisms for the zero 0 character or @ character
I filed this report specifically to track a bug I had spotted in the CirrusSearch code while reviewing a change to MediaWiki core, not because I was unable to search for "0" at all. The particular link I provided in the description still leads to no results. If I can search for "1", without any punctuation, and get results, I should be able to do the same for "0". However, I am prevented from doing so by the bug I pointed out.
If this is not, as I am thinking, merely the result of a PHP misfeature, I would appreciate an explanation.
Change 272311 had a related patch set uploaded (by Gergő Tisza):
Handle '0' search query