/**
* Registers a function to be called on output
*
* This function can be used to manipulate the final output before it is
* displayed. It can be used to create a caching system, compress output
*
* The handler should be a callable function or array of object/method as
* defined in is_callable php function. It should accept 1 arguments:
* 1. The reference to the init class instance
*
* Note that the Nexista_Init::$_info property contains the current cache value
* from the sitemap if set.
*
* This function should call:
* $output = Nexista_Init::run();
* to get the final output. The function is responsible for displaying it.
*
* @param mixed $handler a function or an array of class=>method
*
* @return null
*/
public static function registerOutputHandler($handler)
{
if (is_callable($handler)) {
self::$_outputHandler = $handler;
} else {
Nexista_Error::init('Init Output Handler is not callable!');
}
}
