PHP 7.0.20: Exception has Code 0

Question

I get an exception with errorcode 0 but I don't why? The text/message of the exception is "Call to a member function getId() on null" but the attribute "code" is 0. Why is it 0 and not a real number? All other exception has a correct errorcode.

Is it a bug or a misconfiguration in my php.ini?

Has anybody an idea?

In a class there is that error and in my own exceptionhandler I want to handle all exceptions which there thrown in my application. In the handler I use $exception->getCode() and $exception->getMessage() — user3388366
– user3388366, Commented Sep 14, 2017 at 18:56
Call to member function foo on null is a fatal error. See: stackoverflow.com/questions/277224/… — ficuscr
– ficuscr, Commented Sep 14, 2017 at 19:00
Ah, so I've no chance that a fatal error has a code? or how can I check if it's a fatal error? I use in my fatalhander the function "error_get_last()" but this is always null, but in my old php version 5.6 it works fine :) — user3388366
– user3388366, Commented Sep 14, 2017 at 19:02
You can check that the object you're trying to use, isn't null before using it. If it is, you can throw an exception. — Qirel
– Qirel, Commented Sep 14, 2017 at 19:06

ceejayoz · Accepted Answer · 2017-09-14 19:07:20Z

7

Exceptions don't always have codes. When one is not explicitly defined, the error code defaults to 0. See http://www.php.net/manual/en/exception.construct.php - an exception will default to a message of "", a code of 0, and a previous exception of NULL.

try {
    throw new Exception('Hello!');
} catch(Exception $e) {
    echo $e->getCode(); // prints 0
}

Same thing with things like PHP errors:

try {
    $foo = new stdClass;
    $foo->fooBar();
} catch(Error $e) {
    echo $e->getCode(); // prints 0 too
    echo $e->getMessage(); // prints "Call to a member function fooBar() on null"
}

edited Sep 14, 2017 at 19:07

answered Sep 14, 2017 at 18:49

ceejayoz

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7 Comments

user3388366 Over a year ago

okey, but it in my case it is a php exception, so I hoped that I get an errorCode or an ExceptionType like "E_ERROR". But nothing :)

ceejayoz Over a year ago

@user3388366 PHP's built-in Error class has the identical signature. php.net/manual/en/class.error.php The error code for a fatal error appears to be 0.

user3388366 Over a year ago

Ah, so I've no chance that a fatal error has a code? or how can I check if it's a fatal error? I use in my fatalhander the function "error_get_last()" but this is always null, but in my old php version 5.6 it works fine :)

ficuscr Over a year ago

Nice. I didn't realize that was a recoverable error.

ceejayoz Over a year ago

Yep, this one's recoverable. I misspoke - you can't catch a fatal error, but this one's non-fatal. Edited an example of it into my answer.

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