#controller
    public function log(Request $request)
    {
        $email = $request->input('email');
        $user = DB::table('users')->where('email', $email)->first();
        dd($user); //return null
    }

#route
        Route::post('/log', ['as'=>'log' , 'uses'=>'usercnt@log']);

#form
                     <form action="{{ route('log') }}" method="post">

						{{ csrf_field() }}

						<div class="form-group">
						    <label for="email">Email address:</label>
						    <input type="text" name="email" class="form-control" id="email">
						</div>

						<div class="form-group">
							<label for="pwd">Password:</label>
							<input type="password" name="pwd" class="form-control" id="pwd">
						</div>

					  	<button type="submit" class="btn btn-default">Submit</button>

					</form>