Update .phpmd.cleancode.xml file

Author: richan-fongdasen

.phpmd.cleancode.xml

@@ -129,6 +129,28 @@ function createArray() {
         </example>
     </rule>
 
+    <rule name="ErrorControlOperator"
+          message="Remove error control operator '@' on line {0}."
+          class="PHPMD\Rule\CleanCode\ErrorControlOperator"
+          externalInfoUrl="http://phpmd.org/rules/cleancode.html#errorcontroloperator">
+        <description>
+            <![CDATA[
+Error suppression should be avoided if possible as it doesn't just suppress the error, that
+you are trying to stop, but will also suppress errors that you didn't predict would ever occur.
+Consider changing error_reporting() level and/or setting up your own error handler.
+            ]]>
+        </description>
+        <priority>1</priority>
+        <example>
+            <![CDATA[
+function foo($filePath) {
+    $file = @fopen($filPath); // hides exceptions
+    $key = @$array[$notExistingKey]; // assigns null to $key
+}
+            ]]>
+        </example>
+    </rule>
+
     <rule name="MissingImport"
           since="2.7.0"
           message="Missing class import via use statement (line '{0}', column '{1}')."
@@ -140,6 +162,9 @@ Importing all external classes in a file through use statements makes them clear
             ]]>
         </description>
         <priority>1</priority>
+        <properties>
+            <property name="ignore-global" value="false" description="Ignore classes in the global namespace" />
+        </properties>
         <example>
             <![CDATA[
 function make() {
@@ -148,4 +173,28 @@ function make() {
             ]]>
         </example>
     </rule>
-</ruleset>
+
+    <rule name="UndefinedVariable"
+          since="2.8.0"
+          message="Avoid using undefined variables such as '{0}' which will lead to PHP notices."
+          class="PHPMD\Rule\CleanCode\UndefinedVariable"
+          externalInfoUrl="https://phpmd.org/rules/cleancode.html#undefinedvariable">
+        <description>
+            Detects when a variable is used that has not been defined before.
+        </description>
+        <priority>3</priority>
+        <example>
+            <![CDATA[
+class Foo
+{
+    private function bar()
+    {
+        // $message is undefined
+        echo $message;
+    }
+}
+]]>
+        </example>
+    </rule>
+
+</ruleset>