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
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