Built-In Web Server
PhpStorm has a built-in web server that can be used to preview and debug your application. This server is always running and does not require any manual configuration. All the project files are served on the built-in server with the root URL http://localhost:<built-in server port>/<project root>, with respect to the project structure.
Open a file in a web browser
Right-click a file and select Open in Browser.
From the main menu, select View | Open in Browser.
Use the browser popup in the top right part of the editor window. Click the browser button to open the web server file URL, or Shift+Click it to open the local file URL.
If a Deployment server is defined for this project and marked as default, the file will be served from this server instead. If necessary, you can still open the page via the PhpStorm built-in web server. To do this, open the desired browser and type the URL of the file with respect to the project structure, using http://localhost:<built-in server port>/<project root> as the root URL.