Hi,

I think there's a problem with the modifier "i" in php4.0.4 up to the latest CVS, try the following code snip:

$x = "TEST ?BER TEST";
if(preg_match("!\b?BER\b!",$x))
 echo "matched";
else
 echo "unmatched";

It returns false (== unmatched) even if I change "!\b?BER\b!i" to "!\b?ber\b!i" , but in fact it has to return true (== matched).

I tested this bug down to 4.0.4.
When I tested 4.0.3, the string matched.

My os is SuSE Linux 6.4 with Kernel 2.2.14, my configure-string is
./configure \
  --disable-debug \
  --with-mysql \
  --with-apxs=/usr/sbin/apxs \
  --enable-force-cgi-redirect \
  --enable-discard-path \
  --with-config-file-path=/etc/httpd \
  --enable-ftp \
  --with-gd=/usr/local \
  --with-ttf \
  --with-pdflib=/usr/local \
  --with-zlib=/usr/local \
  --with-jpeg-dir=/usr/local \
  --with-png-dir=/usr/local \
  --with-zlib-dir=/usr/local \
  --with-jpeg-dir=/usr/local \
  --with-png-dir=/usr/local \
  --with-tiff-dir=/usr/local \
  --enable-track-vars \
  --enable-trans-sid

mfg
 CK