Checks if the class has been defined and Checks if the class method exists

class_method_exists.php

/**
 * Checks if the class has been defined and Checks if the class method exists
 * @param $class_object
 * @param $method_name
 * @return bool
 */
function class_method_exists($class_object, $method_name)
{
	return class_exists($class_object) && method_exists($class_object, $method_name);
}