דניאל דנון wrote:
> Lets assume I have the string "cats i saw a cat and a dog"
> i want to strip everything except "cat" and "dog" so the result will be
> "catcatdog",
> using preg_replace.
>
>
> I've tried something like /[^(dog|cat)]+/ but no success
>
> What should I do?
>
Capture everything but only replace the backreference for the words:
$r = preg_replace('#.*?(cat|dog).*?#', '\1', $s);
--
Thanks!
-Shawn
http://www.spidean.com
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