Code Inspection: Unnecessary pass-by-ref
Reports the variables that are passed by reference to a function/method but are not modified in the function/method body. In such cases, the
& in parameter's declaration can be safely removed.
See Passing by Reference (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.