return $return;
}
+ /**
+ * Checks, if the given string is a valid hexadecimal code
+ *
+ * @param string $hexCode
+ *
+ * @return bool
+ */
+ public static function isHex($hexCode)
+ {
+ return @preg_match("/^[a-f0-9]{2,}$/i", $hexCode) && !(strlen($hexCode) & 1);
+ }
+
/**
* @brief This is our primary input filter.
*