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This page is a translated version of the page Manual:Random page and the translation is 25% complete.
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A random page can be viewed via Special:Random. This uses the wfRandom() function, which is capable of avoiding duplicate values for up to approximately 4,611,686,014,132,420,609 (i.e., ≈ ) articles, and the page.page_random values from the page table. The SpecialRandomGetRandomTitle hook can be used to modify the selection criteria.

In MysqlUpdater.php , the RAND() function is used to populate page_random.

By default, selection will be limited to pages from namespaces in $wgContentNamespaces . The user can choose which namespace to look in. For example, if they wanted to view a random file they could go to Special:Random/file. If they wanted to view a random mainspace page they could go to Special:Random/main, etc.

The file that implements this feature is SpecialRandompage.php. SpecialRandomredirect.php (Special:Randomredirect) directs the user to a random redirect page (minus the second redirect). There is an array, $extra, that allows for adding extra SQL statements to the query for selecting a random page from the database.