(PHP 5 >= 5.1.0)
ReflectionMethod::invokeArgs — Invoke args
Invokes the reflected method and pass its arguments as array.
Returns the method result.
   A ReflectionException if the object
   parameter does not contain an instance of the class that this method was declared in.
  
A ReflectionException if the method invocation failed.
Example #1 ReflectionMethod::invokeArgs() example
<?php
class HelloWorld {
    public function sayHelloTo($name) {
        return 'Hello ' . $name;
    }
}
$reflectionMethod = new ReflectionMethod('HelloWorld', 'sayHelloTo');
echo $reflectionMethod->invokeArgs(new HelloWorld(), array('Mike'));
?>
The above example will output:
Hello Mike
Note:
If the function has arguments that need to be references, then they must be references in the passed argument list.