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psalm/docs/running_psalm/issues/UnusedVariable.md

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2020-03-19 17:32:49 +01:00
# UnusedVariable
Emitted when `--find-dead-code` is turned on and Psalm cannot find any references to a variable, once instantiated
```php
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<?php
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function foo() : void {
$a = 5;
$b = 4;
echo $b;
}
```
Can be suppressed by prefixing the variable name with an underscore:
```php
<?php
$_a = 22;
```