5 ms·
You can do function ($parameter) use ($data) { ... } to capture stuff from the local environment. Edit: And you can pass by reference: > $stuff = [1
by cess11 1y ago
You can do
function ($parameter) use ($data) { ... }
to capture stuff from the local environment.
Edit: And you can pass by reference:
> $stuff = [1]
= [
1,
]
> $fn = function ($par) use (&$stuff) { $stuff[] = $par; }
= Closure($par) {#3980 …2}
> $fn(2)
= null
> $stuff
= [
1,
2,
]
Never done it in practice, though, not sure if there are any footguns besides the obvious hazards in remote mutation.
- noduerme 1y agoidk if it counts as an obvious hazard, but being able to modify the original input by reference within a chain of piped functions definitely makes it a lot harder to reason about what that sequence might be doing. Particularly since we assume that arrays are passed by reference anyway unless the function you're calling is making a shallow copy of their elements. My feeling is that this makes the code less legible. I'd rather write 5 lines of code that mutate an object or return a copy than do a pipe this way. I'm sort of not excited to start running into examples of this in the wild.