Code Inspection: Unused local variable
Reports the variables that are considered unused in the following cases:
The value of the variable is not used anywhere or is overwritten immediately.
The reference stored in the variable is not used anywhere or is overwritten immediately.
By default, the inspection is disabled for global space. To enable it, select the Enable inspection in global space checkbox below.
See global space (php.net) for details.
Suppress an inspection in the editor
Position the caret at the highlighted line and press Alt+Enter or click .
Click the arrow next to the inspection you want to suppress and select the necessary suppress action.