Functional utility function to wrap a declared function in a passable variable for chaining (PHP 5.3- version)

lib.lambdafy.53.php

function lambdafy($funcname) {
    if (function_exists($funcname)) {
        return function() use ($funcname) {
            return call_user_func_array($funcname, func_get_args());
        };
    }
    
    throw new ErrorException('Catchable fatal error: Argument 1 passed to lambdafy() must be callable, string given', E_RECOVERABLE_ERROR);
}