June 2005
Intermediate to advanced
794 pages
18h 27m
German
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8.6 Eigene Filter schreiben
Problem
Sie würden gern einen Stream filtern, aber PHP hat nicht den passenden Filter dafür. Zum Beispiel möchten Sie überzählige Leerzeichen und anderen Whitespace aus einem String entfernen, bevor Sie ihn nach php://output ausgeben.
Lösung
Implementieren Sie Ihren eigenen Filter:
class WhitespaceFilter extends php_user_filter { function filter($in, $out, &$consumed, $closing) { while ($bucket = stream_bucket_make_writeable($in)) { $consumed += $bucket->datalen; $bucket->data = preg_replace("/(\s)\s+/","$1",$bucket->data); $bucket->datalen = strlen($bucket->data); stream_bucket_append($out, $bucket); } return PSFS_PASS_ON; } } stream_filter_register("convert.whitespace","WhitespaceFilter"); echo file_put_contents("php://filter/write=convert.whitespace/resource=php://output", ...Become 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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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.