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psalm/docs/running_psalm/issues/AssignmentToVoid.md
Tom Klingenberg ea52b9d23a
Fix minor typos in docs (#3956)
While I was searching for some code, ran across these.
2020-08-08 08:09:41 -04:00

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# AssignmentToVoid
Emitted when assigning from a function that returns `void`:
```php
<?php
function foo() : void {}
$a = foo();
```
## Why this is bad
Though `void`-returning functions are treated by PHP as returning `null` (so this on its own does not lead to runtime errors), `void` is a concept more broadly in programming languages which is not designed for assignment purposes.
## How to fix
You should just be able to remove the assignment entirely:
```php
<?php
function foo() : void {}
foo();
```