Exception slipping exception handler

问题

I got the following exception in my page:

Fatal error: Call to a member function someFunction() on a
    non-object in seomfile.php on line 15

My code near line 15 is:

try
{
    return getObject()->someFunction(); // line 15
}
catch(Exception $e) { }

I know getObject() returns null, but why isn't the try block catching it?

回答1:

PHP mixes Exceptions and Errors. You could use set_error_handler() to throw an exception on error.

回答2:

You can try to use something like this:

try {
    $object = getObject();
    If (!is_object($object)) {
        throw new Exception();
    }

    return $object->someFunction();
catch (Exception $e) {
}

回答3:

Because it's not an exception, it's a standard old-fashioned error.

来源：https://stackoverflow.com/questions/7180263/exception-slipping-exception-handler