AW: [PHP-DEV] Method check - Can someone create a RFC for it?

> -----Ursprüngliche Nachricht----- > Von: Carlos Rodrigues [mailto:carlos.vini@gmail.com] > Gesendet: Mittwoch, 20. März 2013 19:08 > An: internals@lists.php.net > Betreff: [PHP-DEV] Method check - Can someone create a RFC for it? > > Hi, > > I'd like to suggest a new functionality for PHP. I don't know the > internals, and i can't create a patch implementing this. I'm writing > here in case someone likes this idea and write a RFC. > > We've had a problem recently where one of our developers forgot an > "if". > > So instead of writing > if ($obj->image) { > echo $obj->image->getUrl(); > } > > He wrote: > echo $obj->image->getUrl(); > > Here, locally, it was working cause we had the image. But when we > updated the online version we got a "Fatal error: Call to a member > function getUrl() on a non-object" cause someone didn't upload the > image in one of the records that we're on the home page. > > Fatal errors like this can't be catched by a try/catch. And since this > getUrl() was not essential for the page, we'd better output an empty > string then having the site offline. > > One might say: "you guys should have tested it better", or "The image > field should be mandatory in the back end." > And it's true, he should have written that extra "if {}". > > Examining this problem we happened to stumble open Ruby's and > Coffescript's method check. > Something like this: > > $obj->image?->getUrl()?; > > So my suggestion is: > > Create something like $foo->bar?() or $foo->bar()?, where you don't > care whether the function exists, or if $foo is an object. If it > doesn't exist you just return null. > I guess there are plenty of systems out there where it's better to > output an empty string than having your site offline, just cause the > programmer couldn't test it completely. > > Thanks for reading it. > > Carlos Rodrigues > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php Just one question: Is your developer a template designer?