PHP5.5で入ったarray_column()がとても便利だと言うことを@edvakf@githubに教えてもらった。 DBから取得したデータとか下のような形式になってることがよくある。 <?php $rows = [ 0 => [ 'id' => 40, 'title' => 'dave', 'comment' => 'Hello, world!'], 1 => [ 'id' => 10, 'title' => 'alice', 'comment' => '你好,世界!'], 2 => [ 'id' => 30, 'title' => 'charlie', 'comment' => 'こんにちは、世界!' ], 3 => [ 'id' => 20, 'title' => 'bob', 'comment' => 'Salve , per omnia saecula !' ], ]; こう
![PHPのarray_columnが便利 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/5277fc83b38d1f5979921d7735260ed45ed32144/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9UEhQJUUzJTgxJUFFYXJyYXlfY29sdW1uJUUzJTgxJThDJUU0JUJFJUJGJUU1JTg4JUE5JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LWNsaXA9ZWxsaXBzaXMmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz05NjM4NzMwYTZmZTVkNGU0ZjBiNDIyZmU0YjU1ZmM3NA%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwaGFydWthc2FuJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz1hZDg2NmNkNzgzMWM2ZjM2MjMyZjEyZGFjM2RiZjVjZA%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3Dc57dc232a37213d9146d1e922a4cb808)