register_compiler_function() dynamically register a compiler function plugin boolregister_compiler_function stringname mixedimpl boolcacheable Pass in the compiler function name, followed by the PHP function that implements it. The php-function callback impl can be either: a string containing the function name an array of the form array(&$object, $method) with &$object being a reference to an object and $method being a string containing the mehod-name an array of the form array(&$class, $method) with $class being a classname and $method being a class method of that class. cacheable can be omitted in most cases. See Controlling Cacheability of Plugins' Output on how to use it properly. See also unregister_compiler_function() and Plugin Compiler Functions.