preg_replace option unknown

Anon

In PHP 3.0.15 I try to code the following

$cat = preg_replace ("/%(\w\w)/e", "'%'.strtolower('\1')", $cat);

because of a problem with the fact that urlencode()d strings contain uppercase hex characters. I get the following

Warning: Unknown option 'e' in /web2/kor/html/odp/catspider.php3

and the result is blank. Otherwise preg_replace works fine, for instance in

$cat = preg_replace ('¤%FF¤', '%ff', $cat);

Any suggestions as to what is wrong? The example from the manual doesn't work either.

Anon

i think it's your version of php. i've used /e in php4 with no trouble.

<pause>

yup. according to php.net, /e was added in php4. 🙁

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rad

Anon

Thank you for your answer. I checked in php.net documentation before posting my question here (in fact even before trying the /e option at all) and I read it as preg_replace available in 3.0.9 - 3.0.16 and 4 - with nothing special stated about the /e option.

So I'm curious about where you find that information.

Werner

Anon

one of the pdf manuals has extra revision information about when features were added:

http://www.php.net/distributions/manual.pdf

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rad

Anon

What does /e do anyway?
Manual says that it evaluates string as a php code. I've tried using is - without luck.
Maybe someone can post a simple example?