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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21.9 Eine Datei zeilen- oder absatzweise in rückwärtiger Reihenfolge bearbeiten
Problem
Sie wollen mit jeder Zeile einer Datei etwas machen und dabei am Dateiende beginnen. Zum Beispiel ist es einfach, neue Gästebucheinträge ans Dateiende anzuhängen, indem Sie die Datei im Anhängemodus öffnen. Sie wollen die Einträge aber so anzeigen, dass der neuste am Anfang steht, sodass Sie das Ende der Datei zuerst verarbeiten müssen.
Lösung
Wenn die Datei in den Speicher passt, verwenden Sie file(), um jede Zeile der Datei in ein Array einzulesen, und kehren dann das Array um:
$lines = file('guestbook.txt');
$lines = array_reverse($lines);Diskussion
Sie können ein Array von Zeilen, das nicht umgekehrt ist, in umgekehrter Richtung durchlaufen. Hier sehen Sie, ...
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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.