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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4.1 Ein Array anlegen, das nicht mit dem Element 0 beginnt
Problem
Sie möchten einem Array mehrere Elemente auf einmal zuweisen, dabei soll aber der erste Index nicht 0 sein.
Lösung
Veranlassen Sie array() dazu, einen anderen Index zu benutzen, indem Sie die Syntax mit => verwenden:
$presidents = array(1 => 'Washington', 'Adams', 'Jefferson', 'Madison');
Diskussion
Wie in den meisten, wenn auch nicht in allen Computersprachen beginnen PHP-Arrays beim ersten Eintrag mit dem Index 0. Manchmal geben aber die im Array gespeicherten Daten mehr Sinn, wenn die Liste bei 1 beginnt. (Dies erwähnen wir hier nicht nur, um Pascal-Programmierer zu gewinnen.)
In der obigen Lösung ist George Washington der erste Präsident und nicht der nullte; wenn Sie also eine Liste ...
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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.
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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.