Both the $myVar assignment in line 1 and the $higher assignment in line 2
are dead. The first because $myVar is never used and the second because
$higher is always overwritten for every possible time line.
It seems like $mimeType defined by \Illuminate\Support\Facades\File::mimeType($file) on line 35 can also be of type false; however, Illuminate\Http\ResponseTrait::header() does only seem to accept array|string, did you maybe forget to handle an error condition?
This check looks for type mismatches where the missing type is false. This
is usually indicative of an error condtion.
This function either returns a new DateTime object or false, if there was an error.
This is a typical pattern in PHP programming to show that an error has occurred without
raising an exception. The calling code should check for this returned false
before passing on the value to another function or method that may not
be able to handle a false.
The expression response('', 404); of type Illuminate\Http\Response...Routing\ResponseFactory adds the type Illuminate\Contracts\Routing\ResponseFactory to the return on line 48 which is incompatible with the return type documented by CodexShaper\PWA\PWA::assets of type Illuminate\Http\Response.
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.