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psalm/docs/running_psalm/issues/MixedAssignment.md
2020-03-20 19:13:56 -04:00

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# MixedAssignment
Emitted when assigning an unannotated variable to a value for which Psalm
cannot infer a type more specific than `mixed`.
```php
<?php
$a = $_GET['foo'];
```
## How to fix
The above example can be fixed in a few ways by adding an `assert` call:
```php
<?php
$a = $_GET['foo'];
assert(is_string($a));
```
or by adding an explicit cast:
```php
<?php
$a = (string) $_GET['foo'];
```
or by adding a docblock
```php
<?php
/** @var string */
$a = $_GET['foo'];
```