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LaravelでJSONを返す

Last updated at Posted at 2020-05-10

目次

Laravelの記事一覧は下記
PHPフレームワークLaravelの使い方

Laravelバージョン

動作確認はLaravel Framework 7.19.1で行っています

前提条件

eclipseでLaravel開発環境を構築する。デバッグでブレークポイントをつけて止める。(WindowsもVagrantもdockerも)
本記事は上記が完了している前提で書かれています
プロジェクトの作成もapacheの設定も上記で行っています

Controllerにメソッド追加

(1) /sample/app/Http/Controllers/SampleController.phpにjson1メソッド、json2メソッドを追記

    public function json1(Request $request)
    {
        return view('sample.json');
    }

    public function json2(Request $request)
    {
        $data = [
            'a' => $request->input('a'),
            'b' => $request->input('b')
        ];
        return $data;
    }

配列をreturnするようにします

(2) /sample/routes/web.phpに下記を追記
Route::get('sample/json1', 'SampleController@json1'); Route::post('sample/json2', 'SampleController@json2');

viewの作成

/sample/resources/views/sample/json.blade.phpファイル作成

json.blade.php
<html>
    <head>
        <title>sample</title>
        <script type="text/javascript">
            function ajax(){
            	var form = document.getElementById("sampleForm");
            	var req = new XMLHttpRequest();
            	req.open(form.method, form.action);
            	req.responseType = 'json';
            	req.send(new FormData(form));
            	req.onload = function () {
            		var json = req.response;
            		alert("a:" + json['a'] + "\n" + "b:" + json['b']);
            	}
            }
        </script>
    </head>
    <body>

        <form id="sampleForm" action="{{ url('sample/json2') }}" method="post"  onsubmit="ajax(); return false;">
            @csrf
            <input type="text" name="a" >
            <input type="text" name="b" >
            <input type="submit" >
        </form>

    </body>
</html>

動作確認

http://localhost/laravelSample/sample/json1

インプットフォームに値を適当に入力して送信ボタンをクリック
インプットフォームに入力した値がalertで表示された

a.png

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