Line 64 of http://svn.php.net/repository/php/php-src/trunk/ext/pcre/php_pcre.c s...

		ars on Aug 3, 2010 \| parent \| context \| favorite \| on: The Prime That Wasn't Line 64 of http://svn.php.net/repository/php/php-src/trunk/ext/pcre/php... shows that they do handle it. And you use the preg_last_error() function to see it. The return false is for php errors (i.e. programming errors, which also raise warnings), not library errors.

Setting a flag and failing silently is still failing silently.