CComponentAjax::_checkPcreLimit

function _checkPcreLimit($data)
{
	$pcre_backtrack_limit = intval(ini_get("pcre.backtrack_limit"));
	$text_len = strlen($data);
	$text_len++;

	if ($pcre_backtrack_limit > 0 && $pcre_backtrack_limit < $text_len)
	{
		@ini_set("pcre.backtrack_limit", $text_len);
		$pcre_backtrack_limit = intval(ini_get("pcre.backtrack_limit"));
	}

	return $pcre_backtrack_limit >= $text_len;
}