Situation is as follows:
There is a separate object that is responsible for generating page content, we can call it Content. Another object is its' parent - Core object. Content object calls Core method *Check_parameters_count($parameters_count)*, so Core has to check if given parameters count in the URI equals to the integer given while executing this method ($parameters_count), if not - Core should generate error page and stop executing Content's rendering method.
Is there any way I can do this without using if statement? Just using *$core->Check_parameters_count(2)* in the content class in order to simplify job of the specific rendering engine programmers.
Everything should look similar to this:
class Core {
public function Check_parameters_count($parameters_count) {
if (count($this->parameters) != $parameters_count) {
$this->Show_error(404);
$this->Stop_executing($content, 'Render');
//or
stop($content->Render);
//or something similar..
}
}
}
class Content {
public function Render() {
//check given parameters so we could know which page should be rendered and how many parameters should be given
//...
//lets say we should have exactly 2 parameters
$parameters_count = 2;
//check it
$core->Check_parameters_count($parameters_count);
//if parameters count matched - continue method execution
//...
}
}
Throw an exception.
You have 3 scopes:
If you throw an exception in Function B, and make a try/catch block in caller of function A, function A execution will be interrupted by the exception. In fact - all code execution will be interrupted, up to a level which is enclosed in a corresponding try/catch block.