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Re: parsing print_r() output with preg_match_all() - question remainsunanswered ...

From "Christoph M. Becker" <cmbecker69@arcor.de>
Newsgroups comp.lang.php
Subject Re: parsing print_r() output with preg_match_all() - question remainsunanswered ...
Date 2016-01-12 15:03 +0100
Organization solani.org
Message-ID <n7312g$f8i$1@solani.org> (permalink)
References (5 earlier) <5694daea$0$23814$e4fe514c@news.xs4all.nl> <87si23ujik.fsf@bsb.me.uk> <5694f3d9$0$23849$e4fe514c@news.xs4all.nl> <n72u2h$3va$1@solani.org> <56950070$0$23766$e4fe514c@news.xs4all.nl>

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R.Wieser wrote:

> Christoph,
> 
> First off, thanks for the explanation.

You're welcome.

>> However, as the regex is not anchored, it also matches
>> "the brown fox", for instance
> 
> "not anchored" ?   Can you explain what you mean with that please ?

Anchors are assertions about the position of a matching point.  For
instance, ^ at the beginning and $ at the end of a pattern make sure
that the complete subject string has to match.

> I do
> not quite understand how the pattern could both match "the fox" as well as
> "the brown fox" (and presumably "the quick fox" too).   I took it as  given
> *all* words need to appear in the text (in the correct order) for a pattern
> to match it (only one of an ORed set ofcourse).

Indeed, "all words need to appear in the text (in the correct order)",
but without anchors, additional "words" may appear in the text.  Compare

  preg_match('/the quick|brown fox/m', 'the brown fox');

vs.

 preg_match('/^(?:the quick|brown fox)$/m', 'the brown fox');

The former returns 1 (i.e. matches), while the latter returns 0 (i.e.
doesn't match).  That is because the first preg_match() is content to
match only part of the subject string.

-- 
Christoph M. Becker

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Thread

parsing print_r() output with preg_match_all()  "R.Wieser" <address@not.available> - 2016-01-06 17:18 +0100
  Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-06 19:28 +0000
    Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-06 20:50 +0100
      Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-06 21:12 +0000
        Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-06 16:20 -0500
          Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 02:23 +0000
            Re: parsing print_r() output with preg_match_all() Matthew Carter <m@ahungry.com> - 2016-01-06 21:48 -0500
              Re: parsing print_r() output with preg_match_all() Matthew Carter <m@ahungry.com> - 2016-01-06 21:52 -0500
                Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 10:20 +0100
                Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 10:56 +0000
                Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 12:55 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-07 08:36 -0500
                Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 13:58 +0000
                Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 15:33 +0100
                Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 15:31 +0000
                Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 18:23 +0100
            Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-06 22:50 -0500
            Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 10:10 +0100
          Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 10:03 +0100
            Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-07 08:38 -0500
              Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 14:05 +0000
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-07 13:42 -0500
                Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 20:24 +0000
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-07 15:27 -0500
        Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 09:51 +0100
          Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 11:18 +0000
            Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 14:00 +0100
              Re: parsing print_r() output with preg_match_all() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-07 14:00 +0000
              Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 16:19 +0100
      Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-11 09:11 +0100
        Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-11 08:04 -0500
          Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-11 23:48 +0100
            Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-12 00:41 +0100
              Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-11 20:53 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-12 05:40 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 09:12 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-12 21:43 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 16:12 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-12 22:28 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 16:35 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-13 06:39 +0100
                Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-13 08:26 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 08:10 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-13 14:49 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 10:08 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-13 18:50 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 15:06 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-13 23:11 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 17:18 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-13 23:27 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 19:17 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 01:30 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 20:52 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 08:13 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-14 09:18 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 20:07 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-14 16:06 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 22:41 +0100
                Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-14 22:35 +0100
                Re: parsing print_r() output with preg_match_all() Ian Collins <ian-news@hotmail.com> - 2016-01-14 10:24 +1300
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 17:20 -0500
                Re: parsing print_r() output with preg_match_all() Ian Collins <ian-news@hotmail.com> - 2016-01-14 12:14 +1300
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-13 19:18 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 08:34 +0100
                Re: parsing print_r() output with preg_match_all() Anders Wegge Keller <wegge@geostat.dk> - 2016-01-14 09:20 +0100
                Re: parsing print_r() output with preg_match_all() Ian Collins <ian-news@hotmail.com> - 2016-01-14 21:56 +1300
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-14 16:08 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 22:55 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-14 16:59 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-14 23:09 +0100
                Re: parsing print_r() output with preg_match_all() Ian Collins <ian-news@hotmail.com> - 2016-01-15 11:17 +1300
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-14 19:15 -0500
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-14 19:14 -0500
            Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-11 20:50 -0500
              Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-12 05:42 +0100
                Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-12 08:41 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 09:13 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-12 21:44 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 16:13 -0500
                Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-12 22:29 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 16:33 -0500
        Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-12 00:49 +0100
          Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-11 20:54 -0500
  Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 11:17 +0100
    Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 13:49 +0100
      Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 14:20 +0100
        Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 15:31 +0100
          Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 16:00 +0100
          Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-07 13:45 -0500
            Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-07 20:18 +0100
              Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 20:52 +0100
                Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-07 15:29 -0500
            Re: parsing print_r() output with preg_match_all() Tim Streater <timstreater@greenbee.net> - 2016-01-07 22:42 +0000
              Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-08 10:43 +0100
  Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-11 09:07 +0100
    Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-11 08:05 -0500
      Re: parsing print_r() output with preg_match_all() Arno Welzel <usenet@arnowelzel.de> - 2016-01-11 23:51 +0100
        Re: parsing print_r() output with preg_match_all() Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-12 00:31 +0100
        Re: parsing print_r() output with preg_match_all() Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-11 20:55 -0500
        Re: parsing print_r() output with preg_match_all() "R.Wieser" <address@not.available> - 2016-01-12 11:11 +0100
          Re: parsing print_r() output with preg_match_all() - question remains unanswered ... "R.Wieser" <address@not.available> - 2016-01-12 11:54 +0100
            Re: parsing print_r() output with preg_match_all() - question remains unanswered ... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-12 11:25 +0000
              Re: parsing print_r() output with preg_match_all() - question remains unanswered ... "R.Wieser" <address@not.available> - 2016-01-12 13:41 +0100
                Re: parsing print_r() output with preg_match_all() - question remains unanswered ... "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-01-12 14:11 +0100
                Re: parsing print_r() output with preg_match_all() - question remainsunanswered ... "R.Wieser" <address@not.available> - 2016-01-12 14:34 +0100
                Re: parsing print_r() output with preg_match_all() - question remainsunanswered ... "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-01-12 15:03 +0100
                Re: parsing print_r() output with preg_match_all() - questionremainsunanswered ... "R.Wieser" <address@not.available> - 2016-01-12 15:50 +0100
                Re: parsing print_r() output with preg_match_all() - questionremainsunanswered ... "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-01-12 16:36 +0100
                Re: parsing print_r() output with preg_match_all() - Solved. "R.Wieser" <address@not.available> - 2016-01-12 21:28 +0100
                Re: parsing print_r() output with preg_match_all() - question remains unanswered ... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-01-12 14:02 +0000
            Re: parsing print_r() output with preg_match_all() - question remains unanswered ... "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-01-12 12:42 +0100
              Re: parsing print_r() output with preg_match_all() - question remainsunanswered ... "R.Wieser" <address@not.available> - 2016-01-12 14:20 +0100
            Re: parsing print_r() output with preg_match_all() - question remains unanswered ... Jerry Stuckle <jstucklex@attglobal.net> - 2016-01-12 09:43 -0500
              Re: parsing print_r() output with preg_match_all() - question remainsunanswered ... "R.Wieser" <address@not.available> - 2016-01-12 16:11 +0100

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