preg_match("/^#[01-9A-F]{6}$/", $sColor)
Bu durumda sadece iki sınırlayıcı eklemeniz gerekir.
In perl you can write something like
if ( s =~ /x.+y/ )
{ print "match"; }
As you can see the actual regular expression is encapsulated in //. If you want to set an option on the regular expression you put it after the second /, e.g. switching the expression to ungreedy by default /x.+y/U
pcre now emulates this behaviour. Though you have to call a function you also have to provide the delimiters and set the options after the second delimiter. In perl the delimiter has to be /, with pcre you can chose more freely
preg_match("/^#[01-9A-F]{6}$/", $sColor)
preg_match("!^#[01-9A-F]{6}$!", $sColor)
preg_match("#^\#[01-9A-F]{6}$#", $sColor) // need to escape the # within the expression here
preg_match("^#[01-9A-F]{6}$
", $sColor)
all the same to pcre, best to chose a character that doesn't appear within the expression.