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Re: Removing prepositions [message #174265 is a reply to message #174262]

Mon, 30 May 2011 04:06

richard

Messages: 213
Registered: June 2013

Karma:

Senior Member

On Sun, 29 May 2011 18:32:30 -0700 (PDT), jwcarlton wrote:

> I'm pretty sure that the answer to this is "no", but I thought I'd
> ask, anyway.
>
> Is there a better way to remove prepositions from a string than
> putting them all in an array manually, then using str_ireplace()?
>
> Here's what I'm currently doing, but I'm looking for a way to speed it
> up:
>
> // roughly 200 words and phrases here
> $prepositions = array("a", "an", "as", "at", ...);
>
> // remove non alphanumeric
> $string = preg_replace("/[^a-zA-Z0-9\s]/", "", $string);
>
> // convert \s to -
> $string = preg_replace("/ /", "-", $string);
>
> // remove prepositions
> $string = str_ireplace($prepositions, "", $string);
>
> // shorten $string
> if (strlen($string) > 50)
> $string = substr($string, 0, 50);
>
> If it matters, I'm using this in a message board, and I'm plugging the
> subject into the link to the thread (for search engines). Since I'm
> limiting the length to 50 characters, I want to make sure that as many
> keywords as possible are in there.
>
> TIA,
>
> Jason

Problem is, many common words use those prepositions even though they are
not.

In your example, eliminating "a" would change "about" to "bout".
"reply" becomes "ply".
So why bother?

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[Message index]

		Removing prepositions By: jwcarlton on Mon, 30 May 2011 01:32
		Re: Removing prepositions By: Jerry Stuckle on Mon, 30 May 2011 03:20
		Re: Removing prepositions By: richard on Mon, 30 May 2011 04:06
		Re: Removing prepositions By: jwcarlton on Mon, 30 May 2011 07:08
		Re: Removing prepositions By: Jerry Stuckle on Mon, 30 May 2011 13:00
		Re: Removing prepositions By: jwcarlton on Mon, 30 May 2011 22:13
		Re: Removing prepositions By: Jerry Stuckle on Tue, 31 May 2011 00:15
		Re: Removing prepositions By: jwcarlton on Tue, 31 May 2011 00:36
		Re: Removing prepositions By: Jerry Stuckle on Tue, 31 May 2011 02:47
		Re: Removing prepositions By: jwcarlton on Tue, 31 May 2011 03:35
		Re: Removing prepositions By: Jerry Stuckle on Tue, 31 May 2011 11:43
		Re: Removing prepositions By: jwcarlton on Tue, 31 May 2011 16:28
		Re: Removing prepositions By: Michael Fesser on Mon, 30 May 2011 23:10
		Re: Removing prepositions By: Jerry Stuckle on Tue, 31 May 2011 00:18

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