Hey Denyl, Simple workaround ... you can use ereg_replace insted of preg_replace http://www.weberdev.com/get_example.php3?Function=ereg-replace You can sort out your PCRE installation/configuration later. Thanks, Richard On 1/26/06, Denyl Meneses Guillén <dmeneses@xxxxxxxxxxx> wrote: > > When I try to use preg_match(), I get this... > > Fatal error: Call to undefined function preg_match() in > /usr/home/www/library/defines.php on line 25 > > I have php5.0.4 ,web server Apache (Linux) . > > as I can solve it? > > Thanks, > Denyl. > > > > > > > >