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Posted by frizzle on 06/23/06 14:25
Chung Leong wrote:
> frizzle wrote:
> > frizzle wrote:
> > > Andy Hassall wrote:
> > > > On 22 Jun 2006 13:21:50 -0700, "Chung Leong" <chernyshevsky@hotmail.com> wrote:
> > > >
> > > > >Andy Hassall wrote:
> > > > >>
> > > > >> There are undoubtably faster, more concise and cleverer ways of doing this.
> > > > >
> > > > >Which would involve, of course, regular expression :-)
> > > > >
> > > > >preg_match_all('/(?P<name>[^,]+),(?P<url>[^,]+)/', $list, $m,
> > > > >PREG_SET_ORDER);
> > > >
> > > > Ah ha, was trying to work out how to get it with PCRE, knew it was possible
> > > > :-)
> > > >
> > > > --
> > > > Andy Hassall :: andy@andyh.co.uk :: http://www.andyh.co.uk
> > > > http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool
> > >
> > > I'm sorry, but i don't completely understand the logics in the
> > > Disny-function, and i don't completely understand the logics in the
> > > pattern of the preg_match_all part.
> > >
> > > Could someone please explain a little bit more ?
> > >
> > > Frizzle.
> >
> > Especially the "?P" - part in the pattern i cannot figure out ...
> >
> > Frizzle.
>
> The use of (?P<> ... ) indicates named capturing. It only affects how
> the captured texts are referenced. Neither the P, the angle brackets,
> or the text inside them are a part of the pattern. Thus
>
> /(?P<name>[^,]+),(?P<url>[^,]+)/
>
> is the exact same pattern as
>
> /([^,]+),([^,]+)/
>
> Compare the results from using the two and you'll see the difference.
> Here a code snippet:
>
> <?php
>
> header('Content-Type: text/plain');
> $list = "Google,http://www.google.com";
> preg_match_all('/([^,]+),([^,]+)/', $list, $m1, PREG_SET_ORDER);
> preg_match_all('/(?P<name>[^,]+),(?P<url>[^,]+)/', $list, $m2,
> PREG_SET_ORDER);
> var_dump($m1);
> var_dump($m2);
>
> ?>
>
> Look in the manual for how preg_match_all() works.
Ok, thanks, this named capturing is new to me, but looks kind of ideal!
Thanks a lot guys!
I have one little question left, not really essential, but to clean
things up:
can the preg-match-all be adjusted that output would be
[0] => Array
(
[name] => Google
[url] => http://www.google.com
)
instead of (current):
[0] => Array
(
[0] => Google,http://www.google.com
[name] => Google
[1] => Google
[url] => http://www.google.com
[2] => http://www.google.com
)
per name/url -set ?
Frizzle.
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