PhpGacl
Since OpenEMR version 3.0.0, access controls (php-GACL) is included in OpenEMR, thus requiring no separate installation or configuration. Administration of access controls is performed within OpenEMR in the admin->acl menu.
In OpenEMR versions 2.9.0 and earlier, php-GACL was actually installed separately.
The below information is detailed and for developers to learn how php-GACL was integrated and how to use it when modifying code.
Within the OpenEMR directory, check out:
openemr/Documentation/README.phpgacl
openemr/INSTALL
openemr/library/acl.inc
openemr/acl_setup.php
openemr/acl_upgrade.php
There are several threads at the forums on SourceForge:
http://sourceforge.net/forum/forum.php?thread_id=1844870&forum_id=202506
http://sourceforge.net/forum/forum.php?thread_id=1899619&forum_id=202506
http://sourceforge.net/forum/forum.php?thread_id=2045980&forum_id=202506