1
0
mirror of https://github.com/danog/psalm.git synced 2024-12-05 13:10:49 +01:00
psalm/docs/running_psalm/issues/UnusedVariable.md
Bruce Weirdan e496aa406f
Documented using underscore to suppress unused(param/variable) issues (#3580)
Previously it was undocumented, as pointed out in vimeo/psalm#3574
2020-06-13 00:31:37 -04:00

22 lines
314 B
Markdown

# UnusedVariable
Emitted when `--find-dead-code` is turned on and Psalm cannot find any references to a variable, once instantiated
```php
<?php
function foo() : void {
$a = 5;
$b = 4;
echo $b;
}
```
Can be suppressed by prefixing the variable name with an underscore:
```php
<?php
$_a = 22;
```