string similarity comparison

This is a discussion on string similarity comparison within the PHP Language forums, part of the PHP Programming Forums category; Chung Leong wrote: > "Ewoud Dronkert" <firstname@lastname.net.invalid> wrote in message > news:426b606b$...


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  #11 (permalink)  
Old 04-26-2005
R. Rajesh Jeba Anbiah
 
Posts: n/a
Default [OT] PHP mirrors (Was Re: string similarity comparison)

Chung Leong wrote:
> "Ewoud Dronkert" <firstname@lastname.net.invalid> wrote in message
> news:426b606b$0$187$e4fe514c@dreader4.news.xs4all. nl...
> > R. Rajesh Jeba Anbiah wrote:
> > > <http://in2.php.net/sqlite>

> >
> > To avoid having everyone over for a party at _your_ local server,

you
> > should trim your url: <http://php.net/sqlite> (it then jumps to a

local
> > server appropriate for the visitor).

>
> I usually use the server in Finland. Less traffic than the stateside
> servers.


I think, the mirror redirection is random and buggy. For me, it
often redirects to heavy traffic mirror.

--
<?php echo 'Just another PHP saint'; ?>
Email: rrjanbiah-at-Y!com Blog: http://rajeshanbiah.blogspot.com/

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  #12 (permalink)  
Old 04-27-2005
Bosconian
 
Posts: n/a
Default Re: string similarity comparison

"Nicholas Sherlock" <n_sherlock@hotmail.com> wrote in message
news:d4etgm$71b$1@lust.ihug.co.nz...
> Bosconian wrote:
> > "Nicholas Sherlock" <n_sherlock@hotmail.com> wrote in message
> > news:d4cpp0$1jc$1@lust.ihug.co.nz...
> >
> >>Bosconian wrote:
> >>
> >>>I'm looking for a method to compare two strings and grade them for
> >>>similarity.
> >>
> >>http://docs.php.net/en/function.levenshtein.html
> >>
> >>or
> >>
> >>http://docs.php.net/en/function.similar-text.html

> >
> >
> > BTW, would you happen to know if this can be done at the query level?

>
> Ah, do you want to something like this made up query:
>
> SELECT * FROM mytable WHERE text IS SORT OF SIMILAR TO $mysearch ?
>
> If so, you can't do this with PHP functions. You may be able to find an
> add-on for your database server which will add functionality like this,
> but I don't think that it comes standard with any databases.
>
> Cheers,
> Nicholas Sherlock


Something like your mock query makes sense... kind of a LIKE clause on
steroids. I'm surprise MySQL doesn't support it.

In my case it's not a big deal. I'm only dealing with a couple hundred
records at the most. I can simply loop through the recordset (like the
levenshtein php.net example) and find any/all similarities with a value of
less than 10 or whatever.


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