Convert three Community Builder extionsions from J2.5 to J3.6+

I am migrating a website from J2.5 to J3.6 and experiencing issues with several custom extensions. I have one custom, admin only Community Builder plugin and two custom, admin only components for Community Builder that need to be converted to run on Joomla 3.6+, CB 2.1.+, PHP 7+

The plugin is a simple incremental membership number assignment plugin that generates a sequential number on membership registration.

The plugin is throwing these errors:

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'WHERE (cb_memnum='' or cb_memnum=0 or cb_memnum=1 or cb_memnum is NULL) and use' at line 1

and

Deprecated: Non-static method CBfield_memnum::generateID() should not be called statically, assuming $this from incompatible context in F:\xampp5.6\htdocs\2017-vcoa\components\com_comprofiler\plugin\user\plug_cbmemnum\[login to view URL] on line 50

The first CB component is list generator that will pull a list of members depending on field selections and generate a CSV file for postal mailing.

The second CB component is similar to the first, but will print membership expiration reminder post cards or address labels.

Both components are throwing “Component not found” errors and I believe issues with these statements:

$session =& JFactory::getSession();

$db =& JFactory::getDBO();

global $mainframe,$option;

$limit = $mainframe->getUserStateFromRequest( '[login to view URL]', 'limit', $mainframe->getCfg('list_limit'), 'int' );

$limitstart = $mainframe->getUserStateFromRequest( $option.'limitstart', 'limitstart', 0, 'int' );

These extensions have been used since J1.5, converted to J2.5 and now need to be upgraded to run on J3.6+. I believe all of the issues involve fairly simple changes to update deprecated syntax.

MySQL PHP

プロジェクトID: #13488723

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