March 2017
Intermediate to advanced
364 pages
9h 45m
Japanese
Content preview from 初めてのPHP
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12
1
章 オリエンテーションとはじめの一歩
in_array($POST['meal'], $meals)
という文は、サブミットされたフォームパラメータ
meal
（
$_
POST['meal']
の値）が
$meal
配列にあるかどうかを確認します。なければ、実行はこの例の最後の
else
の後に飛び、プログラムは
Unknown meal
を出力します。
条件を満たした食事がサブミットされたら、
prepare()
と
execute()
でクエリをデータベースに
送ります。例えば、食事が
breakfast
の場合、送られるクエリは以下のようになります。
SELECT dish,price FROM meals WHERE meal LIKE 'breakfast'
SQLite やその他のリレーショナルデータベースへのクエリは、構造化問い合わせ言語（SQL：
Structured Query Language）と言われる言語で書かれています。「8 章情報の保存：デー
タベー
ス」で SQL の基本を解説します。
prepare()
関数は、クエリについてさらに情報を入手できる識別
子を返します。
fetchAll()
関数は、その識別子を使ってクエリがデータベース内で見つけたクエリと一致する
食事をすべて取得します。当てはまる食事がない場合、プログラムは
No dishes available
と出力
します。それ以外の場合には、一致した食事についての情報を表示します。
このプログラムは HTML テーブルの先頭部分を出力します。そして、 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.