December 2009
Intermediate to advanced
560 pages
15h 5m
German
Content preview from Reguläre Ausdrücke KochbuchBecome 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,
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8.5 Einfachen Text durch Ergänzen von <p>- und <br>- Tags nach HTML konvertieren
Problem
Sie haben einfachen Text, zum Beispiel einen mehrzeiligen Text, der über ein Textarea-Feld in einem Formular eingegeben wurde. Diesen wollen Sie in einen HTML-Text umwandeln, um ihn auf einer Webseite anzuzeigen. Absätze, die durch zwei aufeinanderfolgende Zeilenumbrüche getrennt sind, sollen durch <p>...</p> umschlossen werden. Zusätzliche Zeilenumbrüche sollen durch <br>-Tags ersetzt werden.
Lösung
Dieses Problem kann in vier einfachen Schritten gelöst werden. In den meisten Programmiersprachen profitieren nur die mittleren beiden Schritte von regulären Ausdrücken.
Schritt 1: HTML-Sonderzeichen durch Zeichenreferenzen ersetzen
Wenn wir einfachen Text nach HTML ...
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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.
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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.