The contents of all pages are searched to find links to the current page. The BackLinks function also answers the question: "Which pages contain the title of this page?".

One page links to Length 9:

PHP Warning

lib/DbaDatabase.php:154: Warning: dba_optimize() [<a href='function.dba-optimize'>function.dba-optimize</a>]: You cannot perform a modification to a database without proper access

lib/DbaDatabase.php:160: Warning: DbaDatabase: optimize()

lib/CachedMarkup.php (In template 'browse' < 'body' < 'html'):499: Notice: Only variables should be assigned by reference