Didn't seem to make it the first time. Shawn McKenzie wrote: > 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); -Shawn -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php