Safely handle fatal missing plugin/function errors?

Hi everyone,

Maybe I'm missing something somewhere, but is there any way to  
gracefully handle the fatal errors if a requested template function  
doesn't exist? For example, if {myfunc} is written into the template  
but function.myfunc.php doesn't exist there is a fatal error that  
kills the remainder of the page render. Is there any built-in  
functionality  in Smarty (though I didn't find it doesn't mean it  
doesn't exist) that would allow the script  to catch that error and  
treat it almost as if the {myfunc} function was never requested in  
the first place? I could see it being as simple as returning NULL for  
functions, or returning the text contained within the block function  
tags. If there's nothing like that in Smarty, is it something the dev  
team could/would consider implementing in a future release?

For me it matters because I'm writing an app that allows users/ 
content editors to add small page plugins to content areas. At the  
moment I simply plan on using a wrapper function that safely handles  
the above problem, but is still not my ideal work-around.
For example  (forgive any errors - this is just off the top of my  
head for demonstration purposes... and it's pretty late at night :-)

{* in the template *}
{callfunc name="weather"}

//---- function.callfun.php --
smarty_function_callfunc($params, &$smarty){
	 if(function_exists("smarty_function_".$params['name']) {
		// call the function and continue
		// return output to template
	} else {
		return NULL;  //there would be an empty spot where that plugin was  
placed.
	}
}

//---- function.weather.php --
smarty_function_weather($params, &$smarty){
	//get local weather
	//fetch template & return
}

Any input is appreciated!

Thanks,
Cameron

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