Newbie Question: breaking a substr() string on a space

[Jackson Linux <jackson.linux@xxxxxxxxx>]

Hi, everyone, I apologise if this posts twice; I'm having issues with 
my outgoing email server.

I'm making 'teasers' of the first, say 200 to 250 characters of some 
articles. This works great:

    $content = strip_tags($article['content']);
    $striptease = substr($content, 0, 275);

but cuts off words right in the midd ...

I'd like to find a way to take $content, look at the first 250 
characters, then count backwards to the last space and chop it there.

Does anyone have an ideas/scripts for this?

Thanks in advance,
Jack

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