There is now a new way to use functions in eoCMS.
Instead of using them like sql_query("SELECT * FROM whatever"); they are now called like
call('sql_query', "SELECT * FROM whatever");
As you can see we are now using a new function called call(). This allows you to create and define a function in its own file which can then be called by the CMS without the need to edit any files, just upload the file containing the function eg
whatever.php

to the functions/ folder and you can then use that function like
call('whatever', "Hello World");

To call a plugin function you must state as the first argument in the call() function, plugin_the plugin folder_the plugin function/file. Due to this format, you shall not be able to use _ in the plugin folder name!!