March 2017
Intermediate to advanced
364 pages
9h 45m
Japanese
Content preview from 初めてのPHP
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2.1
テキスト
23
ダースコアに限られます。ヒアドキュメントの区切りのすべての文字を大文字にすると、ヒアド
キュメントが視覚的にわかりやすくなります。ヒアドキュメントの終わりを示す区切りの行には、
区切りだけを書くようにします。区切りは字下げをしたり、ホワイトスペース、コメント、その他
の文字を後ろに入れたりすることはできません。唯一の例外として、文の終わりを示すためのセミ
コロンを区切りの直後に入れることができます。その場合、同じ行のセミコロンの後ろには何も書
いてはいけません。例2-2 のコードは、このようなルールに従ってヒアドキュメントを出力します。
例
2-2
ヒアドキュメントの出力
print <<<HTMLBLOCK
<html>
<head><title>Menu</title></head>
<body bgcolor="#fffed9">
<h1>Dinner</h>
<ul>
<li> Beef Chow-Fun
<li> Sauteed Pea Shoots
<li> Soy Sauce Noodles
</ul>
</body>
</html>
HTMLBLOCK;
ヒアドキュメントは、二重引用符で囲まれた文字列と同じエスケープ文字と変数置き換え規則に
従います。これは、いくつかの変数が混ざった多くのテキストやHTML を含む文字列を定義した
り出力したりしたいときに特に便利です。この章の後半の例2-22 でその例を示します。
2 つの文字列を結合するには、文字列結合演算子の
.
（ピリオド） ...
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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.