[5.3] Adds an Intersect Method on the Request Class

[AdenFraser]

Allows intersection of request input with provided array of input keys or method arguments.

[taylorotwell]

Is this different than $request->only($keys)?

[AdenFraser]

$request->only($keys) returns null for $keys which are not provided by the form (either due to the inputs not existing, checkbox not being filled, disabled or whatever other reason).

Returning null for values which shouldn't be updated isn't particularly helpful on update methods as the existing value is then nulled.

[taylorotwell]

So could the implement of intersect under the hood simply be:

return array_filter($this->only($keys));

[AdenFraser]

That's a lot cleaner actually!

[GrahamCampbell]

Please send to 5.2. ;)

[AdenFraser]

There you go - #13167

[GrahamCampbell]

Keeping this open incase Taylor wants this on 5.3 only.

[athahersirnaik]

Great PR. Had done this in base DB repository of my codebase.