[SOLVED] Is there a difference between Exception and RuntimeException in PHP?

Is there a difference between Exception and RuntimeException in PHP?

What is the exact semantic difference between \Exception and \RuntimeException in PHP? When we should use the former and when the latter?

Solution

Exception is a base class of all exceptions in PHP (including RuntimeException). As the documentation says:

RuntimeException is thrown if an error which can only be found on runtime occurs.

It means that whenever You are expecting something that normally should work, to go wrong eg: division by zero or array index out of range etc. You can throw RuntimeException.

As for Exception, it is a very generic exception and I would call it a "last resort". You can add it as a last one in "try" just to be sure You are handling all exceptions.

Example:

try {
    //code...
} catch(RuntimeException $e) {
    echo ("RuntimeException..."); 
} catch(Exception $e) {
    echo ("Error something went wrong!"); 
    var_dump($e); 
}

Hope it is a clear now.