Code Inspection: Multiple classes declarations in one file
Reports multiple class declarations in a single file, which violates the PSR-0/PSR-4 standards.
See PSR-0/PSR-4 standards (php-fig.org) 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.