$s = "a(b(c)d)e(f)g";
$p = "/\( ( ( (?>[^()]+) | (?R) )* ) \)/xU";
if (preg_match_all($p, $s, $x)) {
   echo "match";
   // see what's in $x
} else {
   echo "no match";
}


This example pattern is taken straigh out of the PCRE docs, but I don't get the desired result, whatever I try. I haven't been able to succesfully use the experimental (?R) so I was wondering if anyone ever has.

In perl, recursive patterns seem to work fine by the way.


Regards,
Martijn