To open up a file within a browser having a vscode://file/ URL like this:
vscode://file/C:\xampp\htdocs\mycoolapp\app\Models\Membership.php
So it looks like this:
Then save the following as a registry file named vscode.reg:
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Classes\vscode] "URL Protocol"="" @="URL:vscode" [HKEY_CURRENT_USER\Software\Classes\vscode\shell] [HKEY_CURRENT_USER\Software\Classes\vscode\shell\open] [HKEY_CURRENT_USER\Software\Classes\vscode\shell\open\command] @="\"C:\\Program Files\\VSCodium\\VSCodium.exe\" --open-url -- \"%1\""
Double-click it to install into registry.
If you want to know more about this, here's a link to Opening VS Code with URLs.