I found this at
http://www.php.net/manual/en/regexp.reference.subpatterns.php
(?|(Sat)ur|(Sun))day
this mean (Sat) and Sun will be matched at same order
but When I test with regexbuddy it occurr a error abt syntax Thanks
This should work fine with a recent version of PCRE - did you make sure to switch regexbuddy into PCRE mode?
You'll need a pretty recent version too. My PHP 5.2.6 install is too old (PCRE 6.6 2006-02-06), while PHP 5.2.17 (8.02 2010-03-19) is fine.
This test PHP program:
$a = "it is Sunday tomorrow";
preg_match('/(?|(Sat)ur|(Sun))day/', $a, $m);
print_r($m);
Outputs this:
Array
(
[0] => Sunday
[1] => Sun
)
If your version of PCRE is too old, you'll get this error:
Compilation failed: unrecognized character after (? at offset 2