Move to XML

move functions from text to xml

src/Util/XML.php

@@ -462,4 +462,43 @@ class XML
 
 		return $first_item->attributes;
 	}
+
+	/**
+	 * escape text ($str) for XML transport
+	 * @param string $str
+	 * @return string Escaped text.
+	 */
+	public static function xmlify($str)
+	{
+		$buffer = htmlspecialchars($str, ENT_QUOTES, "UTF-8");
+		$buffer = trim($buffer);
+
+		return $buffer;
+	}
+
+	/**
+	 * undo an xmlify
+	 * @param string $s xml escaped text
+	 * @return string unescaped text
+	 */
+	public static function unxmlify($s)
+	{
+		$ret = htmlspecialchars_decode($s, ENT_QUOTES);
+		return $ret;
+	}
+
+	/**
+	 * apply xmlify() to all values of array $val, recursively
+	 * @param array $val
+	 * @return array
+	 */
+	public static function arrayXmlify($val)
+	{
+		if (is_bool($val)) {
+			return $val?"true":"false";
+		} elseif (is_array($val)) {
+			return array_map('XML::arrayXmlify', $val);
+		}
+		return self::xmlify((string) $val);
+	}
 }