+
+ /**
+ * Prepends a given string $prepend to $str with a given total length
+ *
+ * @param $str Given original string which should be prepended
+ * @param $prepend The string to prepend
+ * @param $length Total length of the final string
+ * @return $strFinal Final prepended string
+ */
+ protected function prependStringToString ($str, $prepend, $length) {
+ // Set final string to original string by default
+ $strFinal = $str;
+
+ // Can it devided
+ if (strlen($str) < $length) {
+ // Difference between total length and length of original string
+ $diff = $length - strlen($str);
+
+ // Prepend the string
+ $prepend = str_repeat($prepend, ($diff / strlen($prepend) + 1));
+
+ // Make sure it will definedly fit
+ assert(strlen($prepend) >= $diff);
+
+ // Cut it a little down
+ $prepend = substr($prepend, 0, $diff);
+ //* DEBUG: */ $this->debugOutput('prepend('.strlen($prepend).')='.$prepend.',diff='.$diff.',length='.$length);
+
+ // Construct the final prepended string
+ $strFinal = $prepend . $str;
+ } // END - if
+
+ // Return it
+ return $strFinal;
+ }
+
+ /**
+ * Checks wether the given encoded data was encoded with Base64
+ *
+ * @param $encodedData Encoded data we shall check
+ * @return $isBase64 Wether the encoded data is Base64
+ */
+ protected function isBase64Encoded ($encodedData) {
+ // Determine it
+ $isBase64 = (@base64_decode($encodedData, true) !== false);
+
+ // Return it
+ return $isBase64;
+ }