2018-07-12 19:35:14 +0800 Lauren C.: > Hello, > > My web is powered by Apache and PHP,its access log seems as blow, > > xx.xx.xx.xx - - [12/Jul/2018:19:29:43 +0800] "GET > /2018/07/06/antique-internet/ HTTP/1.1" 200 5489 "https://miscnote.net/"; > "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, > like Gecko) Chrome/67.0.3396.99 Safari/537.36" > > A perl script for stat purpose of this log: > > tail -f /var/log/apache2/access.log|perl -nle 'next unless m{^(\S+) - - > \[(\S+).*\] \"GET (.*?/)\s+}; printf "%-20s%-40s%-40s\n",$1,$3,$2' > > I was totally confused about it. > what does m{...} and its content stand for? > Can you help give a explain?
Hi, Lauren
The m{...} is a regular expression (regexp). If you not familiar with
regexps in Perl, I advise you to read these pages:
- http://perldoc.perl.org/perlintro.html#Regular-expressions
- http://perldoc.perl.org/perlrequick.html
> thanks in advance.
>
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