The `php` command cannot be found. Please verify that PHP is installed, or set the `php.executables` setting.
Open Settings.json and put this codes below: for wamp users
"php.validate.executablePath": "C:wamp64inphpphp7.1.9php.exe",
"php.executablePath": "C:wamp64inphpphp7.1.9php.exe"