September 2009
Intermediate to advanced
912 pages
48h 11m
German
book
PHP 5 Kochbuch, Third Edition
by David Sklar, Adam Trachtenberg, Carsten Lucke, Matthias Brusdeylins, Ulrich Speidel, Stephan Schmidt
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16.2 Wörter suchen
Problem
Sie möchten alle Wörter aus einem String herausfiltern.
Lösung
Der Schlüssel liegt in der sorgfältigen Definition dessen, was Sie unter einem Wort verstehen. Wenn Sie Ihre Definition haben, erzeugen Sie einen regulären Ausdruck mithilfe der speziellen Zeichentypen:
/\S+/ // alles, was kein Leerraum ist /[A-Z'-]+/i // alle Groß- und Kleinbuchstaben, Apostrophe und Bindestriche
Diskussion
Die einfache Frage: »Was ist ein Wort?« ist überraschend kompliziert. Zwar kennen Perl-kompatible reguläre Ausdrücke einen eingebauten Wort-Zeichentyp, der mit \w angegeben wird, aber Sie müssen genau verstehen, wie PHP ein Wort definiert. Ansonsten sind die Resultate anders, als Sie es erwarten.
Da \w direkt aus Perls Definition eines Wortes ...
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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.