Lightning round
There are many topics in Elgg development that have not yet been covered in this guide. This section includes brief descriptions along with pointers of where to look in the code for more information.
Authentication
Elgg uses a simple version of pluggable authentication modules (PAM). The default authentication module uses the username and password available from the ElggUser class and stored in the database. Additional authentication modules can be registered through plugins.
See: /engine/lib/pam.php and pam_auth_userpass() in /engine/lib/sessions.php
Caching
There are several types of caches in Elgg. There are memory caches for database queries and loaded objects to reduce the number of database queries. Views can be cached to files ...
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