PHP exception Handling vs C#

Question

this is a really basic question (I hope). Most of the exception handling I have done has been with c#. In c# any code that errors out in a try catch block is dealt with by the catch code. For example

try
{
 int divByZero=45/0;
}
catch(Exception ex)
{
 errorCode.text=ex.message();
}

The error would be displayed in errorCode.text. If I were to try and run the same code in php however:

try{
    $divByZero=45/0;
    }
catch(Exception ex)
{
  echo ex->getMessage();
}

The catch code is not run. Based on my limeted understanding, php needs a throw. Doesn't that defeat the entire purpose of error checking? Doesn't this reduce a try catch to an if then statement? if(dividing by zero)throw error Please tell me that I don't have to anticipate every possible error in a try catch with a throw. If I do, is there anyway to make php's error handling behave more like c#?

Answer 1

You could also convert all your php errors with set_error_handler() and ErrorException into exceptions:

function exception_error_handler($errno, $errstr, $errfile, $errline )
{
    throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
}
set_error_handler("exception_error_handler");

try {
    $a = 1 / 0;
} catch (ErrorException $e) {
    echo $e->getMessage();
}

Answer 2

PHP's try-catch was implemented later in the language's life, and so it only applies to user-defined exceptions.

If you really want to handle actual errors, set your own error handler.

To define and catch exceptions:

function oops($a)
{
    if (!$a) {
        throw new Exception('empty variable');
    }
    return "oops, $a";
}

try {
    print oops($b);
} catch (Exception $e) {
    print "Error occurred: " . $e->getMessage();
}