Description:
------------
The documentation for the x (PCRE_EXTENDED) modifier states:
"characters between an unescaped # outside a character class and the next newline character, inclusive, are also ignored"

Yet this is not the case in my test example:
The "/" in the regex comment "# firstname/alias" is seen as a regex delimiter.

Test script:
---------------
<?php
$fullname = 'Joe Blow';
if (preg_match('/^
	(\S+)	# firstname/alias
	\s+
	\S+	# surname
$/x', $fullname, $matches)) {
	print $matches[1] . "\n";
}


Expected result:
----------------
Joe

Actual result:
--------------
PHP Warning:  preg_match(): Unknown modifier 'a' in /home/cmanley/t.php on line 8