Laravel/select検索

//menu.blade.php
form name="pf" class="m10 displayIb">
	select name="ps" onchange="pSelectlink()" class="select-border">
		option>住所検索/option>
		optgroup label="呉東">
			option value="search?place=富山市">富山市/option>
			option value="search?place=魚津市">魚津市/option>
			option value="search?place=滑川市">滑川市/option>
			option value="search?place=黒部市">黒部市/option>
			option value="search?place=上市町">上市町/option>
			option value="search?place=立山町">立山町/option>
			option value="search?place=入善町">入善町/option>
			option value="search?place=朝日町">朝日町/option>
		/optgroup>
		optgroup label="呉西">
			option value="search?place=高岡市">高岡市/option>
			option value="search?place=氷見市">氷見市/option>
			option value="search?place=砺波市">砺波市/option>
			option value="search?place=小矢部市">小矢部市/option>
			option value="search?place=南砺市">南砺市/option>
			option value="search?place=射水市">射水市/option>
		/optgroup>
	/select>
/form>

script>
	function pSelectlink() {
		location.href = document.pf.ps.value;
	}
/script>

//Controller
public function search(Request $request) {
	$keyword = $request->input('place');
	$unoccupieds = Unoccupied::where('address', 'LIKE', "%{$keyword}%")->get();
	return view("index", ["unoccupieds"=>$unoccupieds]);
}

//Route
Route::get('/search', 'UnoccupiedController@search');