March 2017
Intermediate to advanced
364 pages
9h 45m
Japanese
Content preview from 初めてのPHP
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
150
8
章 情報の保存：データベース
の疑問に対する素晴らしい答えを提供してくれます。
8.2
データベースへの接続
データベースへの接続を確立するには、新しい
PDO
オブジェクトを作成します。接続するデータ
ベースを表す文字列を PDO コンストラクタに渡すと、プログラムの残りの部分で使用してデータ
ベースと情報をやり取りするためのオブジェクトを返します。
例8-1 は、ユーザ名
penguin
とパスワード
top^hat
を使って、
db.example.com
で動作する MySQL
サーバの
restaurant
という名前のデータベースに接続する
new PDO()
の呼び出しを表します。
例
8-1
PDO
オブジェクトを使った接続
$db = new PDO('mysql:host=db.example.com;dbname=restaurant','penguin','top^hat');
PDO
コン ス ト ラ ク タ の 第 1 引数として渡 す 文 字 列 は、 データソース名（DSN：Data Source
Name）と呼ばれます。データソース名は、接続するデータベースの種類を示す接頭辞から始まり、
次に
:
、そして接続方法に関する情報を提供するセミコロンで区切られた
key=value
のペアが続き
ます。データベース接続にユーザ名とパスワードが必要な場合には、
PDO
コンストラクタへの第 2
引数と第 3 引数として渡します。
DSN に設定できる特定の
key=value
のペアは、接続するデータベースの
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.