original question jalist:
> > I'm trying to grab a string from within a string based on a matching word
> > or phrase.
In the middle of the night i was thinking hey, why not use a regexp,
look for the pattern word-space-word-space-SEARCHWORD-space-word-space-word
something like
$toshow =
regexp ( "( [alphanum]+ [alphanum]+ [$YOURWORD] [alphanum]+ [alphanum]+
)", $totalstring);
I am totally bad with regexps, but that 's the idea. Might be faster than
the array? You'll have to take care of comma's etc.
From: "jalist" <[EMAIL PROTECTED]>
To: "PHP" <[EMAIL PROTECTED]>
Date sent: Thu, 18 Jan 2001 16:12:31 -0000
Subject: RE: [PHP] (Newbie) String within a string
> Excellent, thanks a lot Chris.
>
> Steve
> (jalist)
> [EMAIL PROTECTED]
> http://ls2k.org
>
> -----Original Message-----
> From: Chris Hayes [mailto:[EMAIL PROTECTED]]
> Sent: 18 January 2001 15:43
> To: jalist; PHP
> Subject: Re: [PHP] (Newbie) String within a string
>
>
>
> jalist:
> > I'm trying to grab a string from within a string based on a matching word
> or
> > phrase. Example...
>
> You say you want the middle, not two words before and two words after.
>
> I see several ways.
>
>
> 1. Explode into an word-array and use that:
> 1. prepare string
> a) add spaces after comma's and fullstops by some replace
> operation (replace ',' by ', ').
> b) remove double spaces
> 2. split to an array using explode (space as string separator)
> Now you have every word in a separate place in the array
> 3. Get # of words by count($array)
> 4. Divide by two and get nearest integer (hence floor and +0.5!)
> $mid= floor(count($array)/2 + 0.5)
> OH NO, correction, that's the middle, you wanted a specific word.
> I'm afraid you'll have to walk thorugh the array to find the word
> you need.
>
> for (i=0;i<count($array);i++)
> {
> if ($array[$i]==$searchword)
> { $fragment= "...".
> $array[$mid-2] ." "
> $array[$mid-1] ." "
> $array[$mid] ." "
> $array[$mid+1] ." "
> $array[$mid+2] ."...";
> ##extra job for you: make sure $i >= 2
> ## and $i <= count-2
> ## or you'll get an error
>
> [exit the for loop somehow, maybe drop
> this in a function and RETURN;]
> }
>
> }
>
>
>
> OR
>
> 2. Continue with the strpos and strrpos, organize it a bit better.
> For instance find the middle of the string. Split at nearest
> space in leftstring and rightstring.
>
> Make a function chop_last_word, chop last two or three words from
> leftstring and add to resultstring in right order.
>
> Same for rightstring.
>
> I think the array way is cleaner.
>
> Chris
>
> --------------------------------------------------------------------
> -- C.Hayes Droevendaal 35 6708 PB Wageningen the Netherlands --
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